SYSTEM AND METHOD WITH ADAPTIVE ANGLE-OF-ATTACK AUTOPILOT
First Claim
1. A method of controlling an angle-of-attack of a moving body comprising:
- non-linearly combining a first signal representing an angle-of-attack error with a second signal representing a rate-of-change of an estimated angle-of-attack to generate a third signal, the third signal being a non-linear rate-damping signal; and
subtracting the third signal from the first signal to generate a fourth signal for controlling one or more elements of the moving body.
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Accused Products
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.
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Citations
24 Claims
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1. A method of controlling an angle-of-attack of a moving body comprising:
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non-linearly combining a first signal representing an angle-of-attack error with a second signal representing a rate-of-change of an estimated angle-of-attack to generate a third signal, the third signal being a non-linear rate-damping signal; and
subtracting the third signal from the first signal to generate a fourth signal for controlling one or more elements of the moving body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A control system for controlling angle-of-attack for a moving body comprising:
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a non-linear combining circuit for non-linearly combining a first signal representing an angle-of-attack error with a second signal representing a rate-of-change of an estimated angle-of-attack to generate a third signal, the third signal being a non-linear rate-damping signal; and
a subtraction circuit for subtracting the third signal from the first signal to generate a fourth signal for controlling one or more elements of the moving body. - View Dependent Claims (15, 16, 17, 18, 19)
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20. An airframe comprising:
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a control system to control an angle-of-attack by non-linearly combining a first signal representing an angle-of-attack error with a second signal representing a rate-of-change of an estimated angle-of-attack to generate a third signal, the third signal being a non-linear rate-damping signal, and subtracting the third signal from the first signal to generate a fourth signal for controlling one or more elements of the airframe; and
an airframe-state estimator which generates at least the second signal from sensors. - View Dependent Claims (21, 22, 23, 24)
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Specification