Method and device for detecting oscillatory failures in a position servocontrol subsystem of an aircraft control surface
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United States of America Patent
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Apr 17, 2012
Grant Date -
Jun 17, 2010
app pub date -
Dec 15, 2008
filing date -
Dec 18, 2007
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Abstract
Disclosed is a method of detecting at least one oscillatory fault in at least one positional slaving chain for at least one airfoil of an aircraft. The method involves estimating a reference position of the airfoil in the absence of a fault, and calculating a residual value based on the difference between the estimated reference position and the actual position measured by at least one sensor. The calculated residual value is compared with at least one predetermined threshold value to determine the number of successive and alternating overshoots of the predetermined threshold value by the residual value, and oscillatory fault is determined based on the determined number.
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