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System and method for combining diagnostic evidences for turbine engine
A system and method for combining conclusions from multiple fault detection techniques to isolate likely faults in a turbine engine is provided. The system and...
Engine wear characterizing and quantifying method
A method for characterizing engine wear includes the steps of generating operational data representative of engine operation, comparing the operational data with...
Sensor using ultra thin waveguides and optical fibers
Methods and apparatus are provided for detecting one or more contaminant particles in an environment with an optical sensor. The sensor includes at least one...
Methods and apparatus to provide communication protection technology for
An interference signal canceling system for communications protection is described for canceling interference signals from earth station received signals using a...
Minimal bias switching for fiber optic gyroscopes
A system and method is provided for reducing the sensitivity of the rotation rate measurement to the frequency dependence of the feedback modulator....
Security system with wireless communication features
Methods and systems are presented to provide wireless features with a property security system. A detected alarm, which is incapable of being communicated...
Fluid actuated rotating device including a low power generator
A fluid-powered actuator assembly is modified to include a low power generator. The low power generator rotates in response to a drive force received from the...
Recessed ceiling mounted passive infrared detector
A ceiling-mounted passive infrared detector assembly (30) that has three main components: a junction box (10) which is adapted to be mounted within an opening in...
Low power switching for antenna reconfiguration
Methods and systems for low power switching are provided. In one embodiment, an optical switching system is provided. The system comprises at least one optically...
Direct conversion of HCFC 225ca/cb mixture
Provided are methods for producing hydrofluorocarbons via the selective reduction of a halocarbon blend comprising 1,3-dichloro-1,1,2,2,3-pentafluoropropane.
Outflow valve having a cable operated closure mechanism
An outflow valve includes a valve closure mechanism that automatically closes the outflow valve in the unlikely event the outflow valve actuator becomes...
Air data module that ensures sufficient air data performance after
exposure to relatively high overpressure
An air data module is provided that is relatively small, lightweight, low cost, uses relatively low power, and is relatively easy to install, test, and maintain....
Simultaneous serial transmission of messages with data field arbitration
A communication system has a number of nodes connected to a serial data bus. Nodes communicate with each other by transmitting dominant and recessive bits during...
Titanium crash survivable memory unit
A high strength, light weight crash survivable memory unit (CSMU). The CSMU includes memory storage devices surrounded by a heat resistive material. A housing...
Fiber optic gyroscope asynchronous demodulation
A clock system for a fiber optic gyroscope is provided that includes a highly-tunable clock for the bias modulation and a separate asynchronous high-speed clock...
Raman detection based flow cytometer
A method and apparatus for enabling chemical identification of individual particles, cells of molecules by obtaining a Raman spectrum of a particle, cell or...
Asset location system with enhanced accuracy
An asset is located in an area by reading the asset, by making a first determination based on which of the readers are able to read the asset, by making a second...
LED-based luminaire utilizing optical feedback color and intensity control
A system and method for implementing an LED-based luminaire (100) incorporates one or more color channels (32-n). The luminaire includes a controller (50) that...
A strobe unit responds to a selected candela output by selecting an optimal capacitor charging frequency to minimize current requirements at the selected candela...
Agricultural chemical suspensions
Stable concentrated suspensions readily dispersible in water comprising one or more agricultural solids, a single non-ionic surfactant and a water-soluble glycol...
Chemical vapor deposition method
Method for densifying a porous carbon preform (5). The method includes the steps of: (a) providing the apparatus (11); (b) charging the apparatus (11) with a...
Low profile tension style flexible joint
A low profile tension style flexible joint for pneumatic ducting may be useful as, for example, a joint for aircraft engine pneumatic ducting. The joint of the...
Self calibrating dual diaphragm pressure sensor
A pressure sensor having a predetermined chamber dome angle with an electrode. A hole is located in the top to provide pressure readings and the bottom has an...
Tilt-insensitive flow sensor
A flow sensor is provided having a substrate with a sensing element and flow channel over the sensing element. The sensing element senses at least one property...
Control logic for fuel controls on APUs
Conventional auxiliary power units (APUs) may experience over-temperature shutdowns when attempting to start them at high altitudes. Further, such conventional...
HVAC control device
HVAC control device
Modeling decision making processes
A computer implemented method of predicting decisions uses the knowledge of one or more individuals. The individuals, referred to as a team, are knowledgeable...
Valve control method for circuitry for power generation systems
A fail-safe control system for controlling valves in power generation systems is presented. The AC-coupled, rectified signal supplied to one valve is disabled in...
Single sensor ring laser gyroscope
A ring laser gyroscope is described which includes a laser cavity configured to provide an optical laser path for a pair of counter-propagating laser beams, an...
System and method for ground proximity warning with enhanced obstacle
Systems and methods for displaying ground obstructions on a visual display are disclosed. In an embodiment, a ground proximity warning system includes at least...
Directional sound system with messaging
An exit path indicating device incorporates at least a first port for receiving an alarm indicating signal. In normal operation upon receipt of the alarm...
System and method for capturing and rerouting an individual local security
A method and system used by a central monitoring station to monitor and control a local installed security system. The method includes programming into a...
Dual wavelength detector
A sensor comprises two photodiodes sensitive to different wavelengths. The photodiodes or detectors are stacked in a vertical relationship to each other. A...
Photoelectrocatalytic sensor for measuring oxidizable impurities in air
A photoelectrocatalytic sensor system for measuring oxidizable impurities in air. The sensor system may include a transistor having an electrode and a channel...
Spectrally tunable detector
A spectrally tunable optical detector and methods of manufacture therefore are provided. In one illustrative embodiment, the tunable optical detector includes a...
Pilot relief to reduce strut effects at pilot interface
A turbine section of an engine that includes a shaft, a plurality of blades extending radially relative to the shaft, a bearing assembly, a flowpath housing, and...
Hole location gauges and methods
The present invention provides devices and methods for indicating or gauging the position of one or more holes in a workpiece. In one aspect of the present...
Microfluidic modulating valve
A valve is provided that can selectively change the size of a flow channel in a valve in order to modulate the fluid flow through the valve. In one illustrative...
Multivariable control for an engine
A multivariable controller that models the interaction between groups of sensors and groups of actuators during the operation of an engine. By accounting for the...
Pressure-actuated gas fill/purge valve
An enclosure is provided. The enclosure includes at least one self-actuating valve assembly, incorporated within a wall of the enclosure, including at least one...
Systems and methods for improved inertial navigation
A method for producing inertial measurement data is provided. The method comprises receiving raw inertial measurement data from one or more inertial sensors;...
Hermetic seal for optical fibers
Methods and apparatus are provided for a seal assembly that includes a first plate, a second plate, and compliant material. The first and second plates each have...
Transmission mode RFOG and method for detecting rotation with RFOG
Methods and apparatus are provided for sensing a rotation rate of a ring resonator in a transmission mode. A ring resonator for circulating light beams in...
Compression and data encoding for transmission over a character-based
ACARS systems and methods for compiling messages includes a processing device configured for mapping eight-bit characters in an eight-bit character stream into a...
System and method for eliminating terrain color confusion in aircraft
An improved system and method for eliminating terrain color confusion in aircraft displays are disclosed. An aircraft display system is described that includes a...
Smart altitude callout for helicopters
A method, computer software product, and system to generate altitude callouts according to proximity to a runway at an airport or heliport includes determining...
Fire detection system and method using multiple sensors
Outputs from a plurality of different ambient condition sensors are cross correlated so as to adjust a threshold value for a different, primary, sensor....
Radiation hardened phase locked loop
A method and apparatus for providing a radiation hardened Phase Locked Loop (PLL) are presented. The radiation hardened PLL includes an adjustable bandwidth loop...
Timing control circuit for lossless switching converter
A timing control circuit (70) generates staggered signals from a pulse width modulated signal (68) providing lossless switching in a DC to DC power converter...