Aeronautics and astronautics – Aircraft control
Patent
1992-01-29
1993-07-06
Barefoot, Galen
Aeronautics and astronautics
Aircraft control
244194, 364434, B64C 1900
Patent
active
052246671
ABSTRACT:
A system for improving the flutter behavior of an aircraft provided with a rudder, said system comprising an accelerometer disposed in the rear portion of said aircraft, filter means, and means for adding a correction signal to the piloting signal. According to the invention said filter means comprise a bandpass filter, a phase matching filter, a variable gain amplifier and a switch transmitting the amplified signal to said adder means whenever the air speed of the aircraft is greater than a first speed threshold, said phase matching filter being such that after passing through the control means for the rudder said signal as amplified by said amplifier is retarded by 90.degree. relative to said signal generated by said accelerometer.
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Barefoot Galen
Societe Nationale Industrielle et Aerospatiale
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