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G01G 19/08 (2006.01) G01G 19/07 (2006.01)
Patent
CA 1202335
AIRCRAFT WEIGHT AND BALANCE SYSTEM WITH AUTOMATIC LOADING ERROR CORRECTION Abstract A weight and balance system which automatically compensates for loading errors while the aircraft is stationary. A weight signal is generated from the outputs of a pair of inclinometers mounted on adjacent opposite ends of a landing gear member which bends in response to aircraft weight. The weight signal generated just after no movement of the aircraft is detected is held in a latch. The held weight signal and a subsequently generated weight signal are combined to provide a signal representative of the difference therebetween. The difference signal is scaled by an error correction coefficient to provide a loading error compensation signal which is combined with the subsequently generated weight signal to provide a corrected weight signal. The system further includes means for performing reasonableness tests in response to the restoration of power to the system after power has been down. The reasonableness tests include determining whether the aircraft had been moved or whether there had been a load change during the power down. If movement of the aircraft is determined to have occurred, the latch is reset to hold the weight signal generated just after power to the system is restored. If a load change is determined to have occurred, a power down load correction signal is generated and combined with the loading error compensation signal and the subsequently generated weight signal to provide the corrected weight signal.
432269
Riches Mckenzie & Herbert Llp
Sundstrand Data Control Inc.
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