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Sikorsky Aircraft Corporation patents


Recent patent applications related to Sikorsky Aircraft Corporation. Sikorsky Aircraft Corporation is listed as an Agent/Assignee. Note: Sikorsky Aircraft Corporation may have other listings under different names/spellings. We're not affiliated with Sikorsky Aircraft Corporation, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "S" | Sikorsky Aircraft Corporation-related inventors


Power drive transistor resonance sensor

A transistor resonant characteristic sensor (trecs) includes a sensing element positioned along electronic equipment so that the sensing element is electromagnetically coupled to the electronic equipment. The sensing element includes a coil. ... Sikorsky Aircraft Corporation

Knob to latch interface, method of interfacing a knob to a rotatable latch

According to one embodiment of the disclosure, a knob to latch interface includes a body, a latch in operable communication with the body movable between a latched position and an unlatched position, and a knob longitudinally positionable between a first position and a second position relative to the body and in operable communication with the latch, an outer radial extent of the knob being operationally engagable only while in one of the first position and the second position.. . ... Sikorsky Aircraft Corporation

Core material for composite structures

A unitary core panel for a composite sandwich structure includes a plurality of cell walls defining a plurality of core cells, the plurality of cell walls extending across a thickness of the core, the plurality of core cells including one or more defined structural nonuniformities resulting in nonuniform properties of the core panel. A method of forming a core panel for a composite sandwich structure includes determining structural requirements of the core panel, designing the core panel to satisfy the structural requirements with one or more local nonuniformities in the core panel, and manufacturing the core panel as a unitary core panel with the one or more local nonuniformities.. ... Sikorsky Aircraft Corporation

Rotorcraft structural fault-detection and isolation using virtual monitoring of loads

A system, method, and computer program for detecting and isolating structural faults is provided. To detect and isolate structural faults, a plurality of sensed features that corresponds to sensor data from the monitoring sub-system and a plurality of estimated features that corresponds to the plurality of sensed features can be generated. ... Sikorsky Aircraft Corporation

Systems and methods for integrated, multi-functional, fault tolerant sensing and communication

A fiber-optic sensor system includes a structure having a fiber-optic cable operatively connected thereto. The system includes a network controller with an interrogator operatively connected to the fiber-optic cable to receive optical energy indicative of a characteristic of the structure therefrom and convert optical energy to electrical energy and electrical energy to optical energy for data communication. ... Sikorsky Aircraft Corporation

Pneumatic actuators for severable linkage assemblies

A de-linking assembly includes an actuator defining a chamber and an inlet, a piston slideably disposed within the chamber, link coupled to the actuator, and a ram disposed between the piston and the link. The link defines a stress concentration features and a load point on a side of the link on a side of the stress concentration feature opposite the actuator. ... Sikorsky Aircraft Corporation

Systems and methods for diagnosing turboshaft engine bleed valves

A method for diagnosing the function of an anti-ice/start bleed valve (aisbv) includes determining an operating mode of an engine and retrieving current engine system data associated with the operating mode. The method includes indicating whether the aisbv is functioning properly based on the current engine system data. ... Sikorsky Aircraft Corporation

Weights for water immersion testing

A method and apparatus for securing a rotor blade is disclosed. The apparatus includes a base and an offset member configured to maintain the base at a selected distance from a set point. ... Sikorsky Aircraft Corporation

Crashworthy wheelchair assemblies

A seat base assembly for a wheelchair includes a dock configured to be mounted to a vehicle frame. An attenuating mechanism is operatively connected to the dock to absorb impact between the vehicle frame and a wheelchair. ... Sikorsky Aircraft Corporation

Systems and methods to assess corrosion risk

A method of assessing airframe corrosion risk includes determining a component corrosion stress based on data from at least one of a corrosivity sensor, an aircraft exposure history, a climate database, or an aircraft configuration. The method includes generating a component corrosion risk based on the determined component corrosion stress. ... Sikorsky Aircraft Corporation

Systems and methods for determining aircraft center-of-gravity

A method for determining a center-of-gravity of an aircraft in three dimensions includes determining a first center-of-gravity location for an aircraft in a first plane defined by a first axis and a second axis. The method includes positioning the aircraft in a tilted position by rotating the aircraft and determining a second center-of-gravity location for the aircraft in the first plane in the tilted position. ... Sikorsky Aircraft Corporation

Low infrared signature exhaust through active film cooling active mixing and acitve vane rotation

An exhaust infrared signature reduction arrangement includes an exhaust duct, a first vane support disposed within the exhaust duct and a second vane support disposed within the exhaust duct downstream from the first vane support. The first vane support and the second vane support are movable between a first configuration and a second configuration.. ... Sikorsky Aircraft Corporation

Tension torsion strap

A tension torsion strap by which a blade is connectable with a hub of a propulsor is provided. The tension torsion strap includes an elongate body formed to define attachment features at opposite ends thereof, the attachment features being connectable to the blade at one of the opposite ends and to the hub at the other of the opposite ends, fibrous materials extending along the elongate body and around the attachment features and pretension flanges elastically interposable between the hub and the elongate body. ... Sikorsky Aircraft Corporation

Rotor state feedback system

A control system is provided and includes a servo control system configured to control aerodynamic element pitching, an optical sensor system disposed along rotor blades to generate an optical response reflective of rotor feedback states of the rotor blades and a processing unit operably coupled between the servo control and optical sensor systems, the processing unit being configured to calculate strain in the rotor blades from the optical response, convert the calculated strain into readings of the rotor feedback states and issue a servo command to the servo control system as an instruction for controlling the aerodynamic element pitching.. . ... Sikorsky Aircraft Corporation

05/31/18 / #20180148161

Systems and methods for aircraft balance

An adjustable cable attachment system for a vtol aircraft includes a vtol airframe. A winch is operatively connected to an underside of the airframe with the aircraft in a horizontal flight mode. ... Sikorsky Aircraft Corporation

05/24/18 / #20180143240

Systems and methods for assessing condition of a sensor

A method for assessing the condition of a sensor includes applying a diagnostic signal to the sensor using a controller and receiving a dynamic output response. The dynamic output response includes a voltage transient and return to a baseline sensor output voltage. ... Sikorsky Aircraft Corporation

05/24/18 / #20180141651

Composite swashplate guide for rotorcraft control systems

A swashplate guide for use with a spherical bearing and which connects with an adjacent component includes a hollow cylindrical tube formed from a composite material. An exterior surface of the hollow cylindrical tube provides an engagement surface with the spherical bearing. ... Sikorsky Aircraft Corporation

05/24/18 / #20180141646

Propulsor hub weight element and balancing method

A propulsor hub is provided and includes a casing including an inner annular part and blade-connection parts extending outwardly from the inner annular part, a liner having inner and outer opposed radial ends, the liner being disposed about a corresponding one of the blade-connection parts with the inner radial end thereof at a distance from the inner annular part and a weighted element securely disposed about the corresponding one of the blade-connection parts to abut the outer radial end of the liner.. . ... Sikorsky Aircraft Corporation

05/24/18 / #20180141644

Adaptive landing gear assembly for rotary wing aircraft

An adaptive landing gear assembly for a rotary wing aircraft, the adaptive landing gear assembly including a controller; a first landing gear support having a first ground contact element; and a second landing gear support having a second ground contact element; the controller independently controlling the first landing gear support and the second landing gear support.. . ... Sikorsky Aircraft Corporation

05/24/18 / #20180141642

Position hold override control

A method for position hold override control of an aircraft includes determining, by a processor, that a position hold mode is enabled to hold the aircraft at a substantially fixed position with respect to a target. The processor receives a control input indicative of a commanded change in acceleration of the aircraft as an override of the position hold mode. ... Sikorsky Aircraft Corporation

05/24/18 / #20180141640

Rotor speed control using a feed-forward rotor speed command

Examples of rotor speed reduction using a feed-forward rotor speed control command are provided. In one example, a computer-implemented method includes: receiving, by a processing device, flight command indicative of a change in a flight characteristic of an aircraft comprising a rotor; generating, by the processing device, a change in load factor based on the flight command; generating, by the processing device, a change in rotor speed based on the change in load factor; generating, by the processing device, a rotor speed command based on the change in rotor speed to a flight controller to cause the aircraft to change a rotor speed of the rotor; and changing, by the processing device, the rotor speed of the rotor responsive to the rotor speed command.. ... Sikorsky Aircraft Corporation

05/17/18 / #20180136995

Integrated model for failure diagnosis and prognosis

A method for prognostic modeling includes obtaining probability values for possible health states of a system or component part using one or more data driven models and one or more physics of failure models. A probabilistic network is built using a plurality of observed and latent variables. ... Sikorsky Aircraft Corporation

05/17/18 / #20180135535

Dynamic flight command cross-feed for rotor speed droop reduction

An aircraft and method of flying an aircraft are disclosed. The aircraft includes a cross-feed unit that receives a flight command for the aircraft and determines an amount of fuel for a motor of the aircraft in order to reduce a droop in the aircraft when executing the flight command at the aircraft. ... Sikorsky Aircraft Corporation

05/17/18 / #20180134380

Model following control for torque and rotor speed

A system and method for controlling a rotor of an aircraft is disclosed. A desired rotor speed for the rotor is received and a torque command that generates the received rotor speed is calculated. ... Sikorsky Aircraft Corporation

05/17/18 / #20180133851

Method of reversing surface stress on a coated component

A method of reversing stresses in a component includes cold working a substrate creating a first stress level in the component; and applying a material to the substrate after cold working, the material inducing a second stress level that cancels the first stress level.. . ... Sikorsky Aircraft Corporation

05/10/18 / #20180128701

Strain gage calibration system

A system for strain gage calibration includes a data acquisition system operable to receive sensor inputs from a force sensor as a force input and a strain gage as a strain output. The strain gage detects a strain measurement of a structure under test in response to an excitation force applied by an excitation device, and the force sensor detects the excitation force. ... Sikorsky Aircraft Corporation

05/10/18 / #20180127102

Airbag systems

An airbag system includes a vtol aircraft fuselage having an airbag compartment defined within the fuselage. A protective cover defines a portion of the exterior surface of the fuselage. ... Sikorsky Aircraft Corporation

05/03/18 / #20180119729

Self-lubricated bearings

An aircraft includes an airframe and a rotary component rotatably connected to the airframe by way of a plain bearing. The rotary component is part of a rotorcraft control system. ... Sikorsky Aircraft Corporation

05/03/18 / #20180119713

System and method for health monitoring of hydraulic pumps

A method of monitoring health of a hydraulic pump includes identifying, from performance data received from a sensor coupled to a hydraulic system, intervals of steady state and transient state operation. Dynamic element indicators are determined using data from the interval of steady state operation. ... Sikorsky Aircraft Corporation

05/03/18 / #20180119266

Carburization of steel components

A method of carburizing a steel component having a composition of fe-16.3co-7.5ni-3.5cr-1.75mo-0.2w-0.11c-0.03ti-0.02v includes generating a low pressure vacuum in a carburization furnace having the steel component therein, heating the steel component to an optimal carburization temperature while in the low pressure vacuum, performing a boost cycle to introduce carbon rich gas into the carburization furnace while the steel component is at the optimal carburization temperature and in the low pressure vacuum, and performing a diffuse cycle by ceasing introduction of the carbon rich gas into the carburization furnace to allow for diffusion of the carbon into the steel component to occur and while the steel component is at the optimal carburization temperature and in the low pressure vacuum. The boost cycle and the diffuse cycle are repeated to achieve a carbon content at a surface of the steel component of between 0.40 wt. ... Sikorsky Aircraft Corporation

05/03/18 / #20180118362

Variable geometry helicopter engine inlet

A variable area engine inlet of a helicopter is provided and includes first inlet portions disposed to face one another in opposite directions and at a distance from one another and second inlet portions extending between the first inlet portions and being disposed to face one another in opposite directions and at a distance from one another. The first and second inlet portions define a capture area and at least one or both of the first and second inlet portions include a movable portion disposed to occupy and move between first and second positions. ... Sikorsky Aircraft Corporation

04/19/18 / #20180106360

Gearbox lubrication system for aircraft

A gearbox for a rotary wing aircraft including a sump, a primary lubricant reservoir fluidically connected to the sump, one or more primary lubricant jets fluidically connected to the primary lubricant reservoir, an auxiliary lubricant reservoir fluidically connected to the sump, one or more auxiliary lubricant jets fluidically connected to the auxiliary lubricant reservoir, and at least one valve selectively fluidically connecting the sump and the primary lubricant reservoir based on a first lubricant pressure and the sump and the auxiliary lubricant reservoir based on a second lubricant pressure at the at least one valve.. . ... Sikorsky Aircraft Corporation

04/19/18 / #20180105264

Rotor blade control horn arrangements

A control horn arrangement includes a control horn body with an inboard end and an opposed outboard end. The control horn body defines a torque tube axis which extends between the inboard and outboard end of the control horn body. ... Sikorsky Aircraft Corporation

04/19/18 / #20180105263

Electric propulsion system for a rotary wing aircraft

An electric propulsion system includes a mast defining an axis of rotation. At least one yoke is rotatably mounted to the mast. ... Sikorsky Aircraft Corporation

04/12/18 / #20180101180

Simultaneous flight path control and attitude control with control axis splitting

A system and method of controlling flight of an aircraft is disclosed. The system includes a first inceptor that provides a direct mode command for controlling a control axis of the aircraft according to a direct mode and a second inceptor that provides a stable mode command for controlling the control axis of the aircraft according to a stable mode. ... Sikorsky Aircraft Corporation

04/12/18 / #20180099748

External load management functions for vertical take-off and landing aircraft

According to an aspect, a system in an aircraft includes a vehicle management system (vms) and a load control system (lcs). The lcs includes an lcs processor operable to receive and transmit a plurality of data and load management commands to one or more of: the vms and a load control interface. ... Sikorsky Aircraft Corporation

04/05/18 / #20180096084

System and method for calculating remaining useful life of a component

A system and method for determining a remaining useful life of a component, includes providing a usage and configuration information associated with the component, determining if a preexisting spall condition exists for the component, executing a spall initiation model for the component if the preexisting spall condition does not exist, wherein the spall initiation model provides a spall initiation life associated with the component by analyzing the usage and configuration information, executing a spall propagation model for the component, wherein the spall propagation model provides a spall propagation life associated with the component by analyzing the usage and configuration information, and providing a remaining useful life by integrating the spall initiation life and the spall propagation life.. . ... Sikorsky Aircraft Corporation

04/05/18 / #20180095001

Self-powered multi-functional structural health monitoring sensor

A structural health monitoring module including a sensor attached to a surface of a structural member configured to convert a strain on the structural member to electric energy, a gate operationally connected to the sensor and configured to control distribution of the energy, an energy storage device operationally connected to the gate and configured to receive the energy from the sensor, a data collection device configured to receive the energy from the sensor and at least one of process and record data related to the received energy, and a data transmission device configured to wirelessly transmit data from the data collection device to an external receiver. The gate is configured to direct a portion of the energy to the storage device in a storage state and configured to direct a portion of the energy to the data collection device when in load monitoring or interrogation states.. ... Sikorsky Aircraft Corporation

04/05/18 / #20180094467

Replaceable actuator tip

A pin of a hinge system movable between a first position and a second position is provided, wherein in the first position, the pin is received within a first component and a second component. The pin includes a cylindrical body coupled to an actuator for movement along an axis between the first position and the second position. ... Sikorsky Aircraft Corporation

04/05/18 / #20180093784

Fairing bond fixture

A bond fixture includes a support structure and a first assembly coupled to the support structure. The first assembly includes a frame defining a chamber and a first pressure pad and second pressure pad coupled to the frame opposite one another and positioned within the chamber. ... Sikorsky Aircraft Corporation

04/05/18 / #20180093782

Machine holding fixture for machining composite laminates on a rotor blade

A holding fixture includes a first blade support assembly and a second blade support assembly. The second blade support assembly is spaced at a distance from the first blade support assembly and includes a base plate removably mounted to a milling machine, an adjustable conic support connectable to the base plate via a spacer block, and a blade adjustment assembly movable to control a pressure applied by the blade adjustment assembly.. ... Sikorsky Aircraft Corporation

04/05/18 / #20180093761

De-ice fairing bond fixture

A bond fixture includes a first frame defining a chamber configured to receive a leading edge of a rotor blade and a second frame pivotally coupled to the first frame. The second frame is movable between a first position and a second position. ... Sikorsky Aircraft Corporation

04/05/18 / #20180093760

Flight control pump systems

A flight control pump system includes an electrical machine configured to operate in a motor mode and in a generator mode. A pump is operatively connected to be driven by the electrical machine in the motor mode. ... Sikorsky Aircraft Corporation

04/05/18 / #20180093334

Blade chamfer tools

A tool for machining chamfers includes a tool body defining a first reference and a second reference configured for proper positioning of the tool body on a workpiece. A router port is defined through the tool body to provide access to the workpiece for a router. ... Sikorsky Aircraft Corporation

03/29/18 / #20180090017

Landing zone evaluation and rating sharing among multiple users

A landing zone evaluation and rating sharing system includes a central processor unit (cpu), at least one sensor input operatively connected to the cpu, a communication controller operatively connected to the cpu, the communication controller being operable to pass data to other systems associated with the aerial vehicle, and a landing zone (lz) evaluation controller operatively coupled to a non-volatile computer readable storage medium having computer readable program instructions embodied therewith. The computer readable program instructions are executable by the central processor unit to receive data received through the at least one sensor input, evaluate the data to determine a lz rating for a particular landing zone, and communicate the lz rating to one or more systems associated with the aerial vehicle.. ... Sikorsky Aircraft Corporation

03/29/18 / #20180088004

Fuel system smart node

A measuring system, method, and/or computer program that realizes physics-based relations between sensor readings to monitor for degradations and predict failures of power systems is provided. For example, the supply and return of fuel in a power system is provided by a fuel injection system. ... Sikorsky Aircraft Corporation

03/29/18 / #20180086485

Root end spar plate closure tool for blades

A root end spar plate closure tool includes a spar plate compression assembly for applying compressive force to a spar plate, a first flange extending from the spar plate compression assembly and including at least one pin opening, and a second flange extending from the spar plate compression assembly and including at least one pin opening. The first flange and the second flange define a blade root gap sized to receive a blade root.. ... Sikorsky Aircraft Corporation

03/29/18 / #20180086470

Heating design for rotorcraft blade de-icing and anti-icing

A heater mat assembly for a blade using an electrical current is provided including a first heating element region configured to generate a first amount of heat using the electrical current and disposed at a first region of the heater mat assembly. A second heating element region extends form the first heating element region and is configured to generate a second amount of heat using the electrical current. ... Sikorsky Aircraft Corporation

03/29/18 / #20180086446

Pivot systems for tiltwing aircraft

A tiltwing aircraft includes a fuselage, an engine mounted stationary relative to the fuselage, and an opposed pair of wings. The wings are separated from each other with the fuselage therebetween, each wing independently mounted to the fuselage by a respective pivot system for rotation relative to the fuselage. ... Sikorsky Aircraft Corporation

03/29/18 / #20180086443

Variable ratio gearbox for a rotary wing aircraft tail rotor

A rotary wing aircraft including a prime mover, a main rotor assembly having a first plurality of rotor blades operatively coupled to a main rotor shaft rotatable at a first speed ratio, a tail rotor assembly including a second plurality of rotor blades operatively coupled to a tail rotor shaft rotatable at a second speed ratio, and a variable ratio gearbox assembly mechanically connected to the tail rotor assembly. The variable ratio gearbox assembly operates to selectively vary the second speed ratio relative to the first speed ratio.. ... Sikorsky Aircraft Corporation

03/29/18 / #20180085821

Pneumatic tool system

A tool system is provided and includes a securing element, a hammer element configured to drive a member toward the securing element and first and second orientation elements rigidly disposed on the securing and hammer elements, respectively. The securing and hammer elements have respective operational axes and the first and second orientation elements respectively include orientation sensors configured to cooperatively determine a relative orientation of the respective operational axes.. ... Sikorsky Aircraft Corporation

03/22/18 / #20180080380

Inlet guide vane control for aircraft single engine operation

A method of operating a multi-engine, rotary wing aircraft in a single engine, in-flight mode, the method includes stopping a first engine while operating a second engine; closing variable stop engine inlet guide vanes on the first engine; and turning a gas generator of the first engine at a reference rotational speed.. . ... Sikorsky Aircraft Corporation

03/22/18 / #20180079498

Connector assembly for rotor head swashplate

A connector assembly to connect a swashplate and a rotor shaft or hub is provided. The connector assembly includes a mount configured to fixedly connect to the rotor shaft or hub, a sleeve pivotably attached to the mount, and a translating element translationally retained within the sleeve and configured to engage with the swashplate such that the swashplate and the rotor shaft or hub rotate at the same rotational speed.. ... Sikorsky Aircraft Corporation

03/15/18 / #20180073437

Systems and methods for starting an engine

A system for starting a gas turbine engine includes a rotor drive system and a hydraulic motor system operatively connected to the rotor drive system. A gas turbine engine is operatively connected to the hydraulic motor system for starting the gas turbine engine. ... Sikorsky Aircraft Corporation

03/15/18 / #20180072397

Under flooring armor

A vehicle frame system for a vehicle includes a frame, one or more floor armor panels disposed on the frame, and at least one flooring panel disposed over the frame and configured to sandwich the one or more armor panels between the frame and the flooring panel. The vehicle can be an aircraft (e.g., a helicopter), for example.. ... Sikorsky Aircraft Corporation

03/08/18 / #20180065756

Automatic adjusting fuel boost pump

A fuel supply system for an aircraft includes a fuel tank configured to supply fuel to an engine of an aircraft, a boost pump in operational communication with the fuel tank, wherein the boost pump is configured to control at least one of a fuel level and a fuel pressure in the fuel tank, and an electronic controller in communication with the boost pump and configured to control the boost pump. The electronic controller is configured to receive received information including (i) fuel information, (ii) flight information, and (iii) aircraft information, and configured to control the boost pump based on the received information.. ... Sikorsky Aircraft Corporation

03/08/18 / #20180065738

Autorotation initiation system

A system and method for controlling an altitude loss of an aircraft in response to a power loss event, includes obtaining at least one aircraft condition from at least one sensor, determining a present aircraft energy state of the aircraft from the at least one aircraft condition via an energy analysis unit, wherein the present aircraft energy state includes an aircraft potential energy and at least one of an aircraft kinetic energy and a rotor rotational kinetic energy, calculating a flight path to partially utilize at least one of the aircraft kinetic energy and the rotor rotational kinetic energy to initiate an autorotation state of the aircraft via a flight path controller, wherein the flight path controller minimizes an aircraft potential energy loss associated with the flight path, and initiating the autorotation state of the aircraft via the flight path.. . ... Sikorsky Aircraft Corporation

03/08/18 / #20180065277

Tools and processes for manufacturing parts employing additive manufacturing

A method of manufacturing a fabricated part having complex geometry is provided. The method includes generating a digital model of a tooling having a complex geometry; additively manufacturing a tooling based on the digital model from tooling material; laying-up fabrication materials on the tooling; curing the fabrication materials on the tooling to form a fabricated part; and removing the tooling from the fabricated part.. ... Sikorsky Aircraft Corporation

03/01/18 / #20180059689

Autonomous helicopter posture regulation to moving reference frames

A system and method for flying an aircraft is disclosed. A perception system at the aircraft tracks a trajectory of a moving object. ... Sikorsky Aircraft Corporation

03/01/18 / #20180058264

Gas turbine exhaust assembly

A gas turbine exhaust assembly includes an exhaust flow path configured to receive an exhaust flow from a gas turbine engine, the exhaust flow path defined by an inner hub and a radially outer wall. The gas turbine exhaust assembly also includes a plurality of vanes circumferentially spaced from each other and operatively coupled to the radially outer wall of the exhaust flow path, each of the plurality of vanes extending only partially toward the inner hub and terminating at an inner end of the vanes, the inner end defining an open portion.. ... Sikorsky Aircraft Corporation

02/22/18 / #20180053427

Flight initiation proximity warning system

According to an aspect of the invention, a method of flight initiation proximity warning for an autonomous vehicle is provided. A flight initiation request is detected at a processing system of the autonomous vehicle. ... Sikorsky Aircraft Corporation

02/22/18 / #20180053356

Systems and methods for remotely triggered data acquisition

A method of data acquisition for health management of systems is provided. The method includes receiving, at a remote node, analog data from one or more sensors configured to monitor a health characteristic of a system, converting, at the remote node, the analog data into digital data, time stamping the digital data with the remote node, recording the digital data in a memory of the remote node, wherein the memory is a ring buffer, transmitting, from the remote node to a central device, requested digital data upon receiving a request related to a triggering event, and synchronizing the transmitted data at the central device based on the time stamp of the requested digital data to generate synchronized data.. ... Sikorsky Aircraft Corporation

02/22/18 / #20180052472

Trajectory control of a vehicle

A method of trajectory control for a vehicle includes obtaining an initial trajectory; presenting the initial trajectory as a current trajectory on an i/o device, the current trajectory presented overlaying terrain; initiating travel of the vehicle along the current trajectory; updating the current trajectory and the terrain in real time as the vehicle travels along the current trajectory; determining if change in the current trajectory is required; changing the current trajectory to an altered trajectory in response to determining change in the current trajectory is required; and presenting the altered trajectory on the i/o device, the altered trajectory presented overlaying the terrain.. . ... Sikorsky Aircraft Corporation

02/22/18 / #20180051793

Fluid condition monitoring device

A fluid condition monitoring device includes a sensing assembly including a sensor and a transducer, the sensor to sense a property of the fluid and the transducer to apply a test signal to the fluid and receive a return signal from the fluid; a control assembly coupled to the sensing assembly, the control assembly including a controller and an input/output interface, the controller interfacing with the transducer to generate fluid condition information in response to the return signal; and an interface assembly coupled to the control assembly, the interface assembly including a connection to the input/output interface to transmit the fluid condition information to an external system.. . ... Sikorsky Aircraft Corporation

02/22/18 / #20180050795

Tip clearance harmonic estimation

A method of tip clearance estimation for a rotor blade is provided. The method includes measuring blade deflection of the rotor blade, generating a harmonic function for the rotor blade from the measured blade deflection, predicting tip displacement of the rotor blade using the generated harmonic function and adjusting a position of the rotor blade according to the predicted tip displacement.. ... Sikorsky Aircraft Corporation

02/15/18 / #20180047224

Fleet analytic services toolset

A system for providing fleet analytic services for a fleet includes a fleet interface to receive fleet data associated with operation and maintenance of the fleet; a memory to store the fleet data; a processor to implement a plurality of fleet analytic services modules to process and analyze fleet data for opportunities to improve maintenance, operations, costs, readiness, health and supply/logistics; a user input/output interface to receive commands from a user and output results of the plurality of fleet analytic services modules.. . ... Sikorsky Aircraft Corporation

02/15/18 / #20180045791

Power supply condition monitor

A method for monitoring a health state of electronic equipment is provided and includes capturing data of an operation of the electronic equipment over a sampling range of predefined length, storing captured data in a storage unit and characterizing a behavior of the operation of the electronic equipment based on an analysis of stored captured data in an event a predefined time has expired or the storage unit has reached maximum capacity.. . ... Sikorsky Aircraft Corporation

02/15/18 / #20180045163

Conditional engine igniters

A system and method for preventing a flame out condition in at least one engine, includes detecting a moisture content exceeding a threshold moisture content in an operating environment of the at least one engine, and engaging at least one igniter associated with the at least one engine in response to the moisture content.. . ... Sikorsky Aircraft Corporation

02/15/18 / #20180044039

Bond fixture for sheath assembly of rotor blade

A bond fixture includes a first fixture having a heater and a plurality of clamps. Each of the plurality of clamps includes a first member and a second member rotatable between a first position and a second position. ... Sikorsky Aircraft Corporation

02/15/18 / #20180044038

Main rotor blade cuff bond fixture

A bond fixture including a plurality of supports mounted about a surface. At least one of the plurality of supports includes a vertical member and a hand crank operable to adjust a position of the vertical member. ... Sikorsky Aircraft Corporation

02/15/18 / #20180044037

Bond fixture for leading edge assembly

A bond fixture includes a frame defining a chamber for receiving a component. At least one bladder assembly is connected to the frame. ... Sikorsky Aircraft Corporation

02/15/18 / #20180044036

Bond fixture for composite splice cap assembly

A bond fixture for bonding a component includes a frame defining a chamber for receiving the component. A first pad and a second pad are mounted to the frame. ... Sikorsky Aircraft Corporation

02/15/18 / #20180044027

Dual mode supplemental strut and damper

A strut for mounting an engine in an aircraft includes a first member and a second member. A friction material is coupled to a surface of the first member and is positioned between the first member and the second member. ... Sikorsky Aircraft Corporation

02/15/18 / #20180044006

Splice cap nickel abrasion strip caul

A caul assembly includes a semi-rigid caul plate formed in a shape complementary to a portion of a component receivable therein and a heater located at an exterior surface of the semi-rigid caul plate. The heater is adapted to apply heat to a localized portion of the component.. ... Sikorsky Aircraft Corporation

02/15/18 / #20180044002

Core material for balanced rotor blade

A method of forming a balanced rotor blade assembly includes measuring a weight of a plurality of sub-components of the rotor blade assembly excluding a core. A configuration of a core of the rotor blade assembly is determined. ... Sikorsky Aircraft Corporation

02/15/18 / #20180043994

Cockpit control of a fixed wing aircraft

A device and method for flying an aircraft is disclosed. A housing that is removably installable in a cockpit of the aircraft is installed in the cockpit. ... Sikorsky Aircraft Corporation

02/15/18 / #20180043640

Bond fixture for root end laminate or rotor blade

A bond assembly includes a fixture having a first section movably coupled to a second section. The first section and the second section are disposed opposite one another. ... Sikorsky Aircraft Corporation

02/15/18 / #20180043624

Bonding preparation patch

A bonding preparation patch for application to a resin treated surface is provided. The patch includes a strip having first and second portions, each of which has corresponding first and second sides. ... Sikorsky Aircraft Corporation

02/15/18 / #20180043418

Bond fixture composite splice fairing assembly

A bond fixture includes a frame that defines a chamber for receiving a component. At least one bladder assembly is mounted to the frame and extends into the chamber to apply a pressure to an adjacent surface of the component. ... Sikorsky Aircraft Corporation

02/08/18 / #20180037328

Dual-channel deicing system for a rotary wing aircraft

A dual primary deicing system for a rotary-wing aircraft, according to an exemplary aspect of the present disclosure includes, among other things, an electrothermal heating element system; and a controller in communication with said electrothermal heating element, said controller communicating a heating cycle to said electrothermal heating element system, said heating cycle defining a first electric pulse train associated with a main rotor blade assembly.. . ... Sikorsky Aircraft Corporation

02/08/18 / #20180036973

Composite repair method

A method of repairing a composite structure or forming a component of a part is provided. The method includes releasably laying up of a first member that is curable at a first temperature at or above a constrained temperature limit of the composite structure or part, releasably laying up of a second member on the first member that is curable at a second temperature below the constrained temperature limit, curing the second member into a scaffold at the second temperature at the composite structure or part, transferring the first member and the scaffold remotely from the composite structure or part for first member curing and removing the cured first member from the scaffold for bonding of the cured first member to the composite structure or part.. ... Sikorsky Aircraft Corporation

02/01/18 / #20180031107

Fluid distribution assembly having anti-clog inlet housing

A fluid distribution assembly for distributing a fluid, the fluid distribution assembly includes an inlet housing including a first conduit and a bypass conduit; a chip detector cavity in fluid communication with the first conduit such that the fluid can pass through the first conduit into the chip detector cavity; and an outlet housing in fluid communication with the chip detector cavity and the bypass conduit such that the fluid can pass into the outlet housing through the chip detector cavity and/or the bypass conduit.. . ... Sikorsky Aircraft Corporation

02/01/18 / #20180029692

Spinner shaft attachment

A spinner assembly includes a cone-shaped member having a plurality of blade openings. The cone-shaped member is receivable about a shaft at a first location. ... Sikorsky Aircraft Corporation

02/01/18 / #20180029210

Cuff-blade attachment bushing removal

A cuff-blade attachment bushing removal tool system includes an alignment plate comprising alignment holes defined through the alignment plate in a pattern of a plurality of bushing holes of a blade root, a bladder plate connected to the alignment plate, and a bladder positioned on the bladder plate such that a gap is formed between the bladder and the alignment plate to receive a blade root to align the alignment holes and the bushing holes of the blade root, wherein the bladder is transitionable between an uninflated position where the blade root can be inserted into the gap and an inflated position where the blade root is clamped between the bladder and the alignment plate.. . ... Sikorsky Aircraft Corporation

01/25/18 / #20180027183

Wireless battery-less mini camera and system for interior inspection of closed spaces

An integrated inspection system including at least one surface defining an enclosed space, at least one camera mounted in the enclosed space, and an interrogator device operatively coupled to the at least one camera. The interrogator device provides power to and receives images from the camera.. ... Sikorsky Aircraft Corporation

01/25/18 / #20180022467

Single engine, asymmetrical vertical take-off and landing (vtol) aircraft

A vertical take-off and landing (vtol) aircraft is provided and includes wings, first and second nacelles supported on each of the wings, each of the first and second nacelles including a propeller drivable to generate aircraft thrust, and an asymmetrical power generation unit. The asymmetrical power generation unit includes a single engine unit disposed in only one of the first and second nacelles to generate power to drive the propellers of both the first and second nacelles.. ... Sikorsky Aircraft Corporation

01/25/18 / #20180022449

Rotor swashplate actuator position synchronization

A method of synchronizing a plurality of actuators includes sensing a position of the plurality of actuators associated with a swashplate and calculating a measured collective position and a measured cyclic position based on the sensed position. A collective position error and a cyclic position error are determined from the measured collective position and the measured cyclic position. ... Sikorsky Aircraft Corporation

01/25/18 / #20180022448

Active rotor damping system

An aircraft is provided and includes a non-rotating frame, an engine disposed in the non-rotating frame, a rotating frame, which is drivable by the engine to rotate relative to the non-rotating frame to generate lift and thrust, the rotating frame including a hub and rotor blades extending outwardly from the hub, an actuation system including electro-mechanical actuators (emas) respectively disposed in the rotating frame between the hub and the rotor blades, each ema including a rotary inductive device, a gear train associated with each ema and the corresponding rotary inductive device to convert linear displacements of a piston responsive to rotor blade lead/lag into rotation of the rotary inductive device and a controller that controls the rotary inductive device to operate, in a first mode, as a motor which drives the gear train, and, in a second mode, as a generator which is driven by the gear train.. . ... Sikorsky Aircraft Corporation

01/18/18 / #20180017090

Damage tolerant patterned bond

A bond is provided and includes a substrate having a first surface, a bond structure having a second surface and a bonding assembly adhesively disposed between complementary portions of the first and second surfaces. The bonding assembly includes discrete bond elements configured to form first and second adhesive zones with local sections of the complementary portions of the first and second surfaces. ... Sikorsky Aircraft Corporation

01/18/18 / #20180016650

Methods and processes of forming gears

A method of manufacturing a part is provided. The method includes heating a gear in the presence of carbon to carburize a material of the gear to create a carburized gear, the gear having a plurality of gear teeth and which comprises a selected material. ... Sikorsky Aircraft Corporation

01/18/18 / #20180016026

Perception enhanced refueling system

A system and method for refueling an aircraft during flight is disclosed. A sensor measures a spatial parameter of a probe of the aircraft and of a drogue that provides fuel. ... Sikorsky Aircraft Corporation

01/18/18 / #20180016017

Bleed air heat ejectors

A bleed air heat ejector includes a housing defining an inner passage extending in an axial direction from an inlet of the housing to an outlet of the housing, wherein the inlet is configured to channel ambient air into the housing, and wherein the outlet is configured to channel mixed heated and ambient air out of the housing. A dispenser is mounted in the housing between the inlet and the outlet. ... Sikorsky Aircraft Corporation

01/18/18 / #20180016002

Abrasion resistant pivot bearing

An elastomeric bearing configured for use in a rotor blade assembly is provided including an inner race, and an outer race. An outer damper portion is arranged adjacent the outer race and an inner snubber portion is arranged adjacent the inner race. ... Sikorsky Aircraft Corporation

01/11/18 / #20180009524

Locking mechanisms for tail rotor drive disconnect couplings

A locking mechanism for a driveshaft disconnect coupling includes an input jaw member defining a rotation axis, an output jaw member connectable to the input jaw member for common rotation with the input jaw member, and a cartridge assembly. The cartridge assembly is fixed to the input jaw member, includes a pin, and defines a pin movement axis. ... Sikorsky Aircraft Corporation

01/11/18 / #20180009068

Mobile pressure tool for rotor blade processes

A pressure tool for rotor blade repair including a mobile support system including a support surface, a first bladder support assembly including a first inflatable bladder fixedly mounted to the support surface, a second bladder support assembly including a second inflatable bladder pivotally mounted relative to the support surface, and an activation mechanism operatively coupled to the second bladder support assembly. The activation mechanism is operable to selectively shift the second bladder support assembly relative to the first bladder support assembly. ... Sikorsky Aircraft Corporation

01/04/18 / #20180005362

Structural masking for progressive health monitoring

A method of structural masking for progressive health monitoring of a structural component includes receiving a current image of the structural component. A processor aligns the current image and a reference image of the structural component. ... Sikorsky Aircraft Corporation

01/04/18 / #20180004229

Rotor moment control system for a rotary wing aircraft

A method of controlling rotor moments includes receiving, in a flight control computer (fcc) a rotor moment reference value based on pilot inceptor inputs, sensing rotor moment from one or more sensors, receiving, in the fcc, a rotary wing aircraft condition parameter, and establishing, through the fcc, a rotor blade pitch angle for one or more of a plurality of rotor blades that counteracts external forces acting upon the rotary wing aircraft.. . ... Sikorsky Aircraft Corporation

01/04/18 / #20180003468

Vehicle hatch system, an aircraft employing same and method of armoring a hatch of a vehicle

A vehicle hatch system includes, a frame defining a perimeter of a hatch that is releasably attachable to a hatchway of a vehicle, at least one sub-frame attached to the frame configured to allow replaceable panels to be attached to the at least one sub-frame and the frame, at least one transparent non-armor panel is replaceably attachable to the at least one sub-frame and the frame, and at least one armor panel that is replaceably attachable to the at least one sub-frame and the frame.. . ... Sikorsky Aircraft Corporation

01/04/18 / #20180002815

Cold spray process using treated metal powder

A method of applying a metal comprising titanium to a substrate is disclosed. The method comprises nitriding the surface of metal powder particles comprising titanium by contacting the particles with a first gas comprising nitrogen in a fluidized bed reactor, and depositing the metal powder particles onto the substrate with cold spray deposition using a second gas.. ... Sikorsky Aircraft Corporation

01/04/18 / #20180002038

Apparatus and methods for making rotorcraft rotor blades

A method of making a rotor blade assembly includes receiving a sheath assembly and a blade body at a blade assembly tool. The sheath assembly is spread by applying force to an interior surface of the sheath assembly. ... Sikorsky Aircraft Corporation

01/04/18 / #20180002002

Rotor assembly including a one piece molding rotor hub

A rotor assembly for use with rotor blades and a drive shaft includes a one-piece molded rotor hub having a central hub and a plurality of hollow spindles integrally molded with and extending radially outwardly of the central hub to which rotor blades are attachable. The central hub includes a hollow interior that is receptive to a drive shaft configured to rotate the one-piece molded rotor hub.. ... Sikorsky Aircraft Corporation

12/28/17 / #20170370790

Estimating dynamic thrust or shaft power of an engine

A measuring system is provided that includes a turbine engine thrust estimator that computes “virtual measurements” of dynamic engine thrust and other parameters of interest from test cell data in a very short amount of time. The measuring system ‘tunes’ a user's engine model, in a numerical propulsion system simulation, by optimizing system biases and health parameters to match the sensor outputs of a set of steady state data points across the operating range. ... Sikorsky Aircraft Corporation

12/28/17 / #20170370786

Fiber optic weight sensor optimization for landing gear

A measuring system and method that computes and analyzes sensor data fused with multiple mechanical and thermally induced strain measurements is provided. Further, the measuring system and method realizes physics-based relations between sensor readings due to mechanical and thermal sources by optimally de-coupling a total strain into its mechanical and thermal components. ... Sikorsky Aircraft Corporation

12/28/17 / #20170370233

Enhanced durability nickel abrasion strip

An erosion strip to protect a leading edge surface is provided including an outer layer comprising a wear-resistant material. An elastomer is affixed to an interior surface of the outer layer. ... Sikorsky Aircraft Corporation

12/28/17 / #20170369187

Cold spray method to join or in certain cases strengthen metals

A method of repairing or, in certain cases, strengthening a metallic substrate at a damage site is provided and includes removing material from the substrate around the damage site to form a recess, and cold spraying particulate material into the recess to form a bead of deposited material.. . ... Sikorsky Aircraft Corporation

12/28/17 / #20170369160

Automated autorotation and pilot aiding system

A method of automating entry of an aircraft into autorotation includes detecting a loss of engine power, analyzing a sensed height and sensed airspeed of the aircraft, determining an adjusted position of one or more control surfaces of the aircraft in response to the sensed height and sensed airspeed, and automatically moving the one or more control surfaces to the adjusted position.. . ... Sikorsky Aircraft Corporation

12/28/17 / #20170368608

Integrated vibration damper for additively manufactured structure and method

A vibration damper for an additively manufactured structure includes a structure at least partially formed with an additive manufacturing technique. Also included is a damping element embedded within the structure at an internal location of the structure. ... Sikorsky Aircraft Corporation

12/21/17 / #20170365176

Method and system for teaming manned and unmanned aerial vehicles

A method of teaming a manned aerial vehicle and an unmanned aerial vehicle includes inputting to a controller in a manned vehicle coordinates for an area of interest, plotting a course to the area of interest in a navigation computer operatively connected to the controller, identifying one or more unmanned aerial vehicles (uavs) near the area of interest, communicating to a ground controller rendezvous coordinates for one of the one or more uavs, and negotiating a control hand-off of the one of the one or more uavs from the ground controller to the controller.. . ... Sikorsky Aircraft Corporation

12/21/17 / #20170363529

Modular packaging system for a lubricant condition monitor

An apparatus for assessment of a fluid system includes a scaffold housing with a plurality of internal cavities; a debris monitor module assembly to be selectively inserted into a first cavity of the plurality of internal cavities, the debris monitor module assembly to determine wear debris information in a lubricant; a lubricant condition monitor module assembly to be selectively inserted into a second cavity of the plurality of internal cavities, the lubricant condition monitor module assembly to determine lubricant condition information in the lubricant; and a processing module assembly that is configured to be selectively inserted into a third cavity of the plurality of internal cavities, the processing module assembly to provide communication to an external interface of at least one of the wear debris information and the lubricant condition information.. . ... Sikorsky Aircraft Corporation

12/21/17 / #20170361926

Method of balancing a main rotor hub

A rotor system is provided including a rotor hub configured to rotate about an axis and a plurality of rotor blade assemblies mounted to the rotor hub and configured to rotate within a plane about the axis. A vibration reducing system is operably coupled to the rotor hub. ... Sikorsky Aircraft Corporation

12/21/17 / #20170361352

Liquid shim adhesive injection tool

A tool for installing a liquid shim material into a clearance formed between an assembly first and second component includes a body having a first end and a second end. The first end includes a planar surface and the second end includes a first surface and a second surface arranged at an angle to the first end and to one another. ... Sikorsky Aircraft Corporation

12/14/17 / #20170358916

Circuit breakers with back-feed protection

A circuit breaker includes a switch with a supply terminal and a load terminal. A blocking diode is electrically connected in series between the switch and one of the supply terminal and the load terminal. ... Sikorsky Aircraft Corporation

12/07/17 / #20170351270

Attitude-coupled targeting system for rotary wing aircraft

A flight control system for an aircraft includes a flight control computer operatively interconnected with a main rotor system and a translational thrust system of the aircraft. A selectively enabled integrated target and flight control system arranged in communication with the flight control computer. ... Sikorsky Aircraft Corporation

12/07/17 / #20170349275

Elevator and rudder control of a rotorcraft

An aircraft includes an airframe having an empennage, a counter rotating, coaxial main rotor assembly located at the airframe including an upper rotor assembly and a lower rotor assembly, and a translational thrust system positioned at the empennage and providing translational thrust to the airframe. At least two control surfaces located at the empennage are independently operable via commands from one or more flight control computers. ... Sikorsky Aircraft Corporation

12/07/17 / #20170348926

Repair and reinforcement method for an aircraft

A repair and reinforcement method for an aircraft is provided. The method includes cleaning a corroded portion of a structure of the aircraft, applying an adhesive layer to the cleaned portion of the structure and forming a polymer matrix composite (pmc) patch for application to the adhesive.. ... Sikorsky Aircraft Corporation

11/30/17 / #20170343035

Fastening systems

A fastening system includes an anchoring structure defining a threaded bore. A stud or insert is threaded into the threaded bore. ... Sikorsky Aircraft Corporation

11/30/17 / #20170341744

Main rotor trim tab retention system, an aircraft employing same and a method of replacing a trim tab assembly from blade housing

A main rotor trim tab retention system includes, a blade housing having flanges separated by a cavity defined between the flanges, and a trim tab assembly. The trim tab assembly includes, a trim tab having an aerodynamic surface, at least one arm extending from the trim tab positionable within the cavity while the trim tab extends outward from the cavity, and a spherical bearing connecting the trim tab and the at least one arm, the spherical bearing having a first axis which is substantially perpendicular to the aerodynamic surface of the trim tab. ... Sikorsky Aircraft Corporation

11/30/17 / #20170341743

Trim tab retention system, an aircraft employing same and a method of retaining a trim tab within a blade housing

A trim tab for use in a blade housing includes a cavity connected to an opening extending from the cavity out a trailing edge of the blade housing, the cavity has a first dimension which is greater than a second dimension of the opening at a same spanwise location of the blade housing. The trim tab has a trim portion, a head portion having a head dimension substantially similar to the first dimension, and a tail portion connecting the trim portion and the head portion. ... Sikorsky Aircraft Corporation

11/30/17 / #20170341739

Variable amplitude force generator

A force generator includes a hub, which is rotatable about an axis thereof, an elongate member coupled to the hub such that the elongate member is rotatable with the hub and extends radially outwardly away from the hub and the axis along a radial dimension defined with respect to the axis and a mass, which is movably disposed along the elongate member and is adjustable to multiple radial mass positions relative to the hub.. . ... Sikorsky Aircraft Corporation

11/30/17 / #20170341733

Rotor head for prop-rotor

A rotor head is provided and includes a non-rotating frame, a rotating frame rotatable relative to the non-rotating frame and configured to impart motion to the rotating frame, a rotor hub assembly rotatable about a rotation axis and including a hub and blades extending outwardly from the hub and being pivotable about respective pitch axes thereof and rocker assemblies respectively associated with corresponding ones of the blades. Each rocker assembly is interconnected between the rotating frame and the corresponding one of the blades and configured to convert the motion imparted to the rotating frame into a pitching of one of the blades about the respective pitch axes and amplify the motion such that an angle of the pitching exceeds an angle that would be achieved if the corresponding one of the blades were connected directly to the rotating frame.. ... Sikorsky Aircraft Corporation

11/23/17 / #20170337081

Centralized processing for aircraft operations

A system for centralizing computing operations for an aircraft, including a plurality of aircraft subsystems associated with the aircraft, a plurality of aircraft sensors associated with the aircraft, and a centralized processor to process the computing operations requested by each of the plurality of aircraft subsystems.. . ... Sikorsky Aircraft Corporation

11/23/17 / #20170336809

High-authority yaw control for a tandem vehicle with rigid rotors

A method for executing yaw control of an aircraft including two rotors is provided. The method includes inducing helicopter yaw by creating a differential torque between the two rotors, wherein the creating of the differential torque comprises inducing a differential collective pitch to generate a differential thrust, and maintaining helicopter roll equilibrium during the inducing of the helicopter yaw by inducing a differential cyclic pitch to generate a differential lift offset.. ... Sikorsky Aircraft Corporation

11/23/17 / #20170336789

Task allocation and variable autonomy levels

A system and method for flying an aircraft is disclosed. The system includes one or more flight-assist agents for performing an operation related to flying the aircraft and a vehicle autonomy management system. ... Sikorsky Aircraft Corporation

11/23/17 / #20170336778

On-demand tool kits

An on-demand system for manufacturing service tools is provided. The system includes a digital manual including instructions for service/repair configured to be accessible by a computing device and a library containing one or more additive manufacturing files configured to be accessible by the computing device. ... Sikorsky Aircraft Corporation

11/23/17 / #20170336430

Virtual tachometers based on time series filtering

A system and method for receiving a plurality of first inputs from a transducer, where the plurality of first inputs correspond to vibrations of a rotational machine, and filtering the plurality of first inputs to derive a frequency of interest. The system and method then generates a sinusoidal signal at the frequency of interest and a pulse train of one or multiple pulses per revolution at the frequency of interest from the sinusoidal signal. ... Sikorsky Aircraft Corporation

11/23/17 / #20170336024

Lubricant level sensing for an actuator

According to one aspect, a lubricant level sensing system for an actuator is provided. The lubricant level sensing system includes a pressure port in an outer housing of the actuator, a pressure sensor, and a pathway from the pressure port to the pressure sensor. ... Sikorsky Aircraft Corporation

11/23/17 / #20170334557

Delta fuselage for vertical take-off and landing (vtol) aircraft

A vertical take-off and landing (vtol) aircraft is provided. The aircraft includes a wing, nacelles supportively disposed at opposite ends of the wing, proprotors respectively attached to each of the nacelles with each of the proprotors being rotatable to generate lift in vertical flight and thrust in horizontal flight and a delta-wing shaped fuselage disposed along the wing between the nacelles.. ... Sikorsky Aircraft Corporation

11/23/17 / #20170334556

Steady state differential roll moment control with automated differential lateral control

A method for controlling a differential rotor roll moment for a coaxial helicopter with rigid rotors, the method including receiving, with a processor, a signal indicative of a displacement command from a controller; receiving, with the processor via a sensor, one or more signals indicative of a longitudinal velocity, an angular velocity of one or more rotors and an air density ratio for the helicopter; determining, with the processor, a ganged collective mixing command in response to the receiving of the displacement command; determining, with the processor, a rotor advance ratio as a function of the longitudinal velocity and the angular velocity; and determining, with the processor, a corrective differential lateral cyclic command for the rigid rotors that controls the differential rotor roll moment to a desired value.. . ... Sikorsky Aircraft Corporation

11/23/17 / #20170334554

Aircraft rotor blade with reduced stress

An aircraft rotor blade includes a surface of the rotor blade, at least one main hole that extends through the surface and has a width and a length, and at least one leader hole that extends through the surface and has a length that is less than the length of the main hole and arranged spaced from and adjacent the main hole. The leader hole gradually increases in width from a first end of the leader hole opposite the main hole to an opposed second end of the leader hole proximate the main hole to operatively gradually distribute stress in the leader and main holes and rotor blade and reduce an amount of the stress exerted therein.. ... Sikorsky Aircraft Corporation

11/23/17 / #20170334553

Vibration control assembly for an aircraft and method of controlling aircraft vibration

A vibration control assembly for an aircraft including a housing operatively coupled to the aircraft. Also included is a cage disposed within an interior region of the housing, the cage rotatable within the housing about a first axis. ... Sikorsky Aircraft Corporation

11/23/17 / #20170333934

Masking plug for cold spray repair at counterbore hole

A method of improving a structure of a component adjacent a feature is provided including removing a portion of the structure including at least one area where damage of corrosion has occurred or is likely to occur to expose a surface of the structure. A masking plug is installed into the feature such that a base of the masking plug is coupled to a first portion of the feature and a head of the masking plug is arranged adjacent a second portion of the feature. ... Sikorsky Aircraft Corporation

11/16/17 / #20170331844

Systems and methods for assessing airframe health

A method of assessing structural health includes receiving an anomaly detector, receiving an anomaly detection threshold, and receiving a strain measurement for a structure of interest. A rating is generated for the strain measurement using the anomaly detector and compared with the anomaly detection threshold. ... Sikorsky Aircraft Corporation

11/16/17 / #20170331239

Memory device having first and second parts

A memory device includes first and second parts. The first part includes a plug receiver configured for reception of a plug and a head coupled to the plug receiver. ... Sikorsky Aircraft Corporation

11/16/17 / #20170329349

Flexible command model for aircraft control

Two methods of combining multiple response types into a single flexible command model are provided and include receiving a pilot stick input, generating an aircraft response to the pilot stick input that is a continuous blend of response types by including calculable time-varying coefficients set as a function of a magnitude of the pilot stick input and other aircraft states such as airspeed, imposing at least an angular acceleration command limit and using other non-linear elements to optimize the aircraft response to the pilot stick input.. . ... Sikorsky Aircraft Corporation

11/16/17 / #20170327219

Vertical take-off and landing aircraft with hybrid power and method

A vertical take-off and landing aircraft including a wing structure including a wing, a rotor operatively supported by the wing, and a hybrid power system configured to drive the rotor, the hybrid power system including a first power system and a second power system, wherein a first energy source for the first power system is different than a second energy source for the second power system.. . ... Sikorsky Aircraft Corporation

11/16/17 / #20170327217

Composite reinforced swashplate

A swashplate of a blade pitch control assembly is provided including a metal component having one or more interfacing features. The metal component includes a hollow first cylinder having a first flange extending outwardly from a first end thereof and a second flange extending outwardly from a second end thereof. ... Sikorsky Aircraft Corporation

11/16/17 / #20170327215

Directional stiffness bearing sleeve assembly for rotor systems

A bearing sleeve assembly includes a rigid inner element having a cylindrical inner diameter bore and an outer surface that is non-cylindrical. Also included is a rigid outer element spaced radially outwardly from the rigid inner element, the rigid outer element comprising a cylindrical member with a uniform cross-section that forms a ring with an inner-diameter surface and an outer-diameter surface, the outer element's inner-diameter surface and the non-cylindrical outer surface of the inner element defining a non-uniform annulus therebetween. ... Sikorsky Aircraft Corporation

11/16/17 / #20170327209

Multi-objective control system with control allocation

A flight system for an aircraft and method for controlling a clearance between a first rotor disk and a second rotor disk of an aircraft is disclosed. The flight system includes a sensor for measuring an angle of deviation of at least one of a first rotor disk and a second rotor disk of the aircraft to indicate a clearance between the first rotor disk and the second rotor disk as well as sensors for measuring a flight condition of the aircraft. ... Sikorsky Aircraft Corporation

11/09/17 / #20170322069

Measurement system for aircraft, aircraft having the same, and method of measuring weight for aircraft

A system for weight measurement for an aircraft having a weight on wheels threshold between a flight mode and a ground mode includes a weight on wheels sensor arrangeable on a landing gear assembly of the aircraft, and a computing device receiving first detected data from the sensor related to strain on the landing gear assembly. The computing device calculates a rate of change of the strain over time to determine when the landing gear assembly reaches the weight on wheels threshold. ... Sikorsky Aircraft Corporation

10/26/17 / #20170308726

Magnetic identification assembly and method of identifying a component

An embedded magnetic identification assembly includes a base component formed of a material. Also included is a plurality of elements formed in an array at a surface of the base component, wherein the plurality of elements is formed of a magnetic material.. ... Sikorsky Aircraft Corporation

10/26/17 / #20170308102

Space partitioning for motion planning

An aspect includes space partitioning for vehicle motion planning. A plurality of obstacle data is analyzed to determine a plurality of obstacle locations in a configuration space of a vehicle. ... Sikorsky Aircraft Corporation

10/26/17 / #20170308101

Aircraft and method of orienting an airframe of an aircraft

An aircraft includes an airframe, an extending tail, a counter rotating, coaxial main rotor assembly including an upper rotor assembly and a lower rotor assembly, a translational thrust system positioned at the extending tail, the translational thrust system providing translational thrust to the air-frame; and a horizontal stabilizer positioned at the extending tail, the horizontal stabilizer having one or more elevators; wherein the aircraft is configured to mix at least two of the main rotor assembly collective pitch, the main rotor assembly cyclic pitch, the elevator deflection, and the translational thrust system thrust to trim the aircraft attitude.. . ... Sikorsky Aircraft Corporation

10/26/17 / #20170307646

Airspeed estimation system

An airspeed estimation system of an aircraft includes an electronic airspeed rate modeler unit configured to output an estimated airspeed rate signal indicating an estimated airspeed rate of the aircraft. The estimated airspeed rate signal is based on a longitudinal body acceleration of the aircraft and at least one adaptive parametric airspeed model. ... Sikorsky Aircraft Corporation

10/26/17 / #20170307402

Synthetic vision augmented with multispectral sensing

A method for augmenting a synthetic vision system of a vehicle includes receiving, with a processor, signals indicative of real-time sensor data of a terrain for the vehicle via one or more acquisition devices; creating, with the processor, a terrain mesh of the terrain in response to the receiving of the sensor data; correlating, with the processor, the terrain mesh with preloaded terrain data of the terrain; creating, with the processor, a multispectral image of the terrain in response to the correlating the terrain mesh with the preloaded data; and texturing, with the processor, the terrain mesh for display on a display device.. . ... Sikorsky Aircraft Corporation

10/26/17 / #20170307090

Hydraulic actuator force fight mitigation mechanism

A control valve for a multi-stage hydraulic actuator includes a valve body defining a translation axis, a spool disposed within the valve body and movable along the translation axis, and a flange. The flange is fixed relative to the spool and has an aperture disposed externally of the valve body to removably fix the spool to a spool of a redundant control valve independently connected to the multi-stage hydraulic actuator for mitigating force fights between actuators coupled to the control valve.. ... Sikorsky Aircraft Corporation

10/26/17 / #20170305544

Turn radius and bank angle for rotary wing aircraft

An aircraft composed of an airframe, an extending tail, a counter rotating, coaxial main rotor assembly including an upper rotor assembly and a lower rotor assembly, and a translational thrust system positioned at the extending tail. The translational thrust system provides translational thrust to the airframe. ... Sikorsky Aircraft Corporation

10/26/17 / #20170305543

Sealed hub and shaft fairing for rotary wing aircraft

An aircraft includes an airframe; an extending tail; a counter rotating, coaxial main rotor assembly including an upper rotor assembly and a lower rotor assembly; a translational thrust system positioned at the extending tail, the translational thrust system providing translational thrust to the airframe; an upper hub fairing positioned at the upper rotor assembly; a lower hub fairing positioned at the lower rotor assembly; and a shaft fairing disposed between the upper hub fairing and the lower hub fairing; wherein the upper hub fairing is substantially sealed to the shaft fairing and the lower hub fairing is substantially sealed to the shaft fairing.. . ... Sikorsky Aircraft Corporation

10/26/17 / #20170305540

Noise modes for rotary wing aircraft

A method of controlling noise of an aircraft includes storing a plurality of predefined noise modes; receiving a selection of a selected noise mode from the plurality of predefined noise modes, the selected noise mode identifying at least one operational parameter; and controlling the aircraft in response to the at least one operational parameter.. . ... Sikorsky Aircraft Corporation

10/26/17 / #20170305539

Rotorcraft footprint

An aircraft includes an airframe having an extending tail and a longitudinal axis extending from a nose of the airframe defining a length of the airframe. A counter rotating, coaxial main rotor assembly is located at the airframe and includes an upper rotor assembly and a lower rotor assembly. ... Sikorsky Aircraft Corporation

10/26/17 / #20170305534

Rotorcraft systems to reduce pilot workload

An aircraft includes an airframe having an extending tail, a counter rotating, coaxial main rotor assembly disposed at the airframe including an upper rotor assembly and a lower rotor assembly, and a translational thrust system positioned at the extending tail and providing translational thrust to the airframe. A fly by wire control system for the aircraft includes a flight control system configured to receive a plurality of inputs and a flight control computer to translate the inputs into commands and issue the commands to one or more controlled elements of the aircraft. ... Sikorsky Aircraft Corporation








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