Aeronautics and astronautics – Aircraft control – Automatic
Patent
1997-07-29
2000-08-15
Poon, Peter M.
Aeronautics and astronautics
Aircraft control
Automatic
244184, B64C 1900
Patent
active
061023302
ABSTRACT:
An emergency flight control system is disclosed for lateral control using only differential engine thrust modulation of multiengine aircraft having at least two engines laterally displaced to the left and right from the axis of the aircraft in response to a heading angle command .psi..sub.c to be tracked. By continually sensing the heading angle .psi. of the aircraft and computing a heading error signal .psi..sub.e as a function of the difference between the heading angle command .psi..sub.c and the sensed heading angle .psi., a track control signal is developed with compensation as a function of sensed bank angle .PHI., bank angle rate .phi., or roll rate p, yaw rate .tau., and true velocity to produce an aircraft thrust control signal ATC.sub..psi.(L,R). The thrust control signal is differentially applied to the left and right engines with equal amplitude and opposite sign such that a negative sign is applied to the control signal on the side of the aircraft to which a turn is required to reduce the error signal until the heading feedback reduces the error to zero.
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Bull John
Burcham, Jr. Frank W.
Burken John J.
Dinh Tien
Kusmiss John H.
Poon Peter M.
The United States of America as represented by the Administrator
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