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Motion-vibration hybrid control of flexible-base-joint-link space manipulation system capturing target spacecraft
1School of Aerospace Engineering, Tsinghua University, ZhiShan Road, Haidian, Beijing 100084, China.
None:
This study analyses the space manipulation system's contact collision dynamics of capturing a target spacecraft, considering the influence of multiple vibrations in the base, joints, and links. The dynamic models of a flexible-base-joint-link space manipulation system and the target spacecraft are derived. The impact generated by the capture collision is examined. A dynamic model for the combined spacecraft system is established. Using singular perturbation theory, the model is decomposed into controllable subsystems. A motion-vibration hybrid controller is proposed, which incorporates an adaptive constrained neural network control based on the barrier Lyapunov function, hybrid trajectory method, and linear quadratic optimal control. The controller satisfies the torque-limited requirements, and its parameters are adaptively updated. Numerical examples are presented to substantiate the validity of the main results.
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