System and method with adaptive angle-of-attack autopilot

Details System and method with adaptive angle-of-attack autopilot System and method with adaptive angle-of-attack autopilot

2006-05-09

2006-05-09

Camby, Richard M. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Aeronautical vehicle

C244S181000

Reexamination Certificate

active

07043345

ABSTRACT:
A control system includes a rate-damping loop that uses a calculated angle-of attack error to non-linearly scale a rate-feedback signal so that at lower angle-of attack (AOA) error values, an acceleration feedback term plays a greater role in pitch compensation, while at greater angle-of-attack error values, a rate-feedback term plays a greater role in the pitch compensation. In some embodiments, a control system and method of controlling an angle-of-attack of a moving body are provided. A signal representing an angle-of-attack error is non-linearly combined with a signal representing a rate-of-change of an estimated angle-of-attack to generate a non-linear rate-damping signal. The non-linear rate-damping signal is subtracted from the signal representing the angle-of-attack error to generate a signal to control one or more elements of the moving body.

REFERENCES:
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patent: 6131055 (2000-10-01), Patrick
patent: 6273370 (2001-08-01), Colgren
patent: 6325333 (2001-12-01), Najmabadi et al.

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