非合作目标绕飞任务的航天器鲁棒姿轨耦合控制

This paper studies the relative position and attitude control of spacecraft fly-around mission in the presence of parameter uncertainties, disturbances and input saturation. Firstly, based on the relative orbit dynamic model expressed in the line-of-sight (LOS) frame and relative attitude dynamic model described by modified rodrigues parameters, an integrated relative position and attitude coupled dynamic model by satisfying the sight orientation requirements is established. Then, by using the backstepping control method, a robust adaptive control scheme is proposed, among which the anti-windup technique is employed to design a saturation compensator such that the adverse effects caused by actuator saturation can be reduced, and the adaptive methodology is applied to estimate unknown parameters and the upper bound of the disturbances. Finally, numerical simulations are performed to demonstrate the effectiveness of the proposed control schemes.