Saturation restraint of inputs backstepping control for a flexible hypersonic vehicle

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (20) : 38-43.

LU Yao SUN You LU Kunfeng

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Abstract

According to the attitude tracking control problem of a flexible air-breathing hypersonic vehicle, a nonlinear control method with saturation restraint of inputs based on backstepping was proposed.Considering the influence of the deflection of the elevator on the lift, a new virtual control variable was introduced to control the state of angle of attack precisely.The effects brought by the elastic modes of the body were considered as a class of disturbance, which was estimated via the disturbance observer and compensated within the controller.A nonlinear gain function was introduced to improve the saturation restraint capability of the control input of the system, and the stability of the close-loop system was proved based on the Lyaponuv theory.The simulation analysis demonstrated the validity of the proposed method．

Key words

hypersonic vehicle / elasticity / backstepping / saturation restraint / disturbance observer

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LU Yao SUN You LU Kunfeng . Saturation restraint of inputs backstepping control for a flexible hypersonic vehicle[J]. Journal of Vibration and Shock, 2019, 38(20): 38-43

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