Ground strike protection function for aircraft autopilot

Details Ground strike protection function for aircraft autopilot Ground strike protection function for aircraft autopilot

1996-07-18

1999-05-11

Barefoot, Galen

Aeronautics and astronautics

Aircraft control

Automatic

244195, 701 9, 701 12, 340963, B64C13/18

Patent

active

059019271

ABSTRACT:
A method and apparatus for use with an aircraft autopilot to prevent an aircraft part from striking the ground during near ground maneuvers by employing a protection circuit between the outer loop and the inner loop of the control chain between the autopilot and the control surface, the prevention circuit producing an output signal when there is a possibility of ground strike which output signal operates to reduce the control surface command signal from the inner loop to the control surface and thus be rapidly responsive to aircraft attitude changes that could produce ground strike.

REFERENCES:
patent: 3945590 (1976-03-01), Kennedy, Jr. et al.
patent: 4419732 (1983-12-01), Lambregts et al.
patent: 4956780 (1990-09-01), Sankrithi et al.

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