Anti-interference attitude control method for Mars lander with uncertain rotational inertia
A technology of moment of inertia and attitude control, applied in the direction of the guidance device of space navigation vehicle, can solve the problem of inability to guarantee the attitude control accuracy of the lander, and achieve the effect of improving engineering application value, anti-interference and adaptability
Active Publication Date: 2016-09-21
BEIHANG UNIV
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Abstract
The invention relates to an anti-interference attitude control method for a Mars lander with uncertain rotational inertia. The anti-interference attitude control method comprises the steps that firstly, an attitude kinematics and dynamics model of the Mars lander with the uncertain rotational inertia is established; secondly, aiming at the influence brought by the uncertain rotational inertia of the Mars lander, a self-adaptive controller is designed to estimate the uncertain rotational inertia; thirdly, the interference influence of gust on the Mars lander is estimated through a nonlinear interference observer, and then the gust estimated value is fed back to a control system to be subjected to feedforward offset; and finally, the nonlinear interference observer, the self-adaptive controller and a sliding mode controller for ensuring the system attitude precision are composited, so that the anti-interference attitude control method for the Mars lander with the uncertain rotational inertia is constructed. The anti-interference attitude control method for the Mars lander with the uncertain rotational inertia has the characteristics of being high in anti-interference performance and adaptability, and compared with a traditional Mars lander attitude control method, the practical engineering value is higher.
Application Domain
Spacecraft guiding apparatus
Technology Topic
Self adaptiveAttitude control +8
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