摘要:
Approaches are provided that evaluate overall engine thrust and potentially other engine operating parameters statically on the ground for an engine. The results of the evaluation are used to produce a correlated analytical model that accurately models engine performance. Once testing on the ground is complete and correlated model determined, the engine is placed aboard an aircraft and tested in flight. Thrust of the engine can be determined at least in part using the correlated model and this determined thrust is compared to the desired thrust.
摘要:
An improved system, apparatus and method for estimating thrust from an engine, and more specifically, a system for estimating thrust from strain gauge and accelerometer measurements. At least one strain gauge is mounted on an engine mount to measure strain to estimate a constant velocity or steady-state portion of thrust. At least one accelerometer is mounted on the vehicle to measure acceleration to estimate a transient portion of thrust. Steady-state thrust estimation and transient thrust estimation are combined to estimate thrust from the engine. An algorithm provides steps for estimating thrust from strain gauge and accelerometer measurements.
摘要:
A system for reconstructing sensor data in a rotor system that comprises a rotating component of the rotor system, a plurality of sensors in the rotating component to sense at least one of loads and motion characteristics in the rotating component and to generate sensor data, and an analysis unit to generate reconstructed sensor data from the sensor data using numerical analysis for low-rank matrices.
摘要:
A fiber-optic based thrust load measurement system is coupled to a bearing housing. The measurement system includes at least one fiber optic sensor configured to detect one or more parameters related to the bearing housing. An optical coupler is configured to regulate light signals emitted from a light source and light signals reflected from the fiber optic sensor. A detector system is configured to receive light signals from the optical coupler. A processor is configured to receive an output from the detector system and to determine a thrust load on a thrust bearing based on the detected one or more parameters related to the bearing housing.
摘要:
A control system for lift-generating unit, the control system comprising: detector unit for detecting at least one parameter from which stall may be calculated; scaling unit for determining a scale factor dependent on the or each detected parameter; and multiplier unit for multiplying an incoming lift demand signal by the scale factor to provide an outgoing lift demand signal.
摘要:
A method of determining the lift generated by a lift-generating member is presented. The lift-generating member being coupled to a component within the lift load path with the lift load path component experiencing strain as a result of the lift generated by the lift-generating member. The method involves the steps of coupling at least one strain measurement means to the lift load path component, obtaining strain measurements from the strain measurement means, and calculating the lift generated by the lift-generating member from strain measurements.
摘要:
An engine test system includes a base constructed and arranged to reside at a fixed location. The system further includes an engine support member constructed and arranged to concurrently support an engine and move relative to the base. The system further includes a linear transducer having (i) a first portion supported by the base, (ii) a second portion supported by the engine support member, and (iii) a circuit adjacent the first and second portions. The circuit is constructed and arranged to provide a linear transducer signal identifying an amount of linear compression and/or tension between the engine support member and the base along a predefined direction. When the linear transducer resides at a break in station, such an embodiment provides a simple, low cost mechanism which is capable of providing a horsepower measurement for every engine passing through the break in station.
摘要:
A system and method use an optical strain gage to measure engine bearing thrust. Reflecting surfaces, or mirrors, encapsulated in a housing, are separated by an initial gap. An incoming fiber receives light from an interferometer and transmits the light to the reflecting surfaces, which then reflect the light back to the interferometer. An engine load is introduced to a bearing element bonded to the housing, and the rotor thrust into the bearing element causes a change in the initial gap. An increase in the initial gap indicates tension and a decrease in the initial gap indicates compression.
摘要:
In present day propeller driven aircraft, the engine is mounted on slightly resilient engine mounts which in turn are secured to the aircraft fuselage. Under propeller rotation, the developed thrust causes the engine housing to move slightly forward relative to the fuselage due to the resiliency of the mounts. The amplitude of the engine displacement is directly proportional to the magnitude of the thrust, and the present invention measures this displacement and converts it to an indicated value of thrust. A displacement or force balance transducer, remote from the engine proper, is mounted behind the engine on the engine compartment firewall. A dimensionally stable compliant tensile member such as a steel cable having one end bolted to the engine housing and the other end connected to the spring loaded moveable core of the transducer transmits the engine displacement to the transducer. Securing the cable to an existing stud on the engine housing is a simple mechanical connection, and requires no modification to the engine itself.