Aircraft mode suppression
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United States of America Patent
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-
Apr 15, 2008
Grant Date -
Oct 20, 2005
app pub date -
Mar 11, 2005
filing date -
Mar 12, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An aircraft control system operates during landing to suppress normal modes of flexing of the aircraft or modes of rigid rotation. The excitation of the modes are measured using accelerometers attached to the aircraft or strain-measuring devices attached to the landing gears. To suppress the modes, the controller operates the flight control surfaces, e.g., elevators, ailerons, rudders and spoilers and/or the steering angle of the nose wheel. This reduces vibration, which reduces wear and makes braking more even because the variation in load on the ground wheels caused by the excitation of the modes is reduced.
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