空间飞行器抓捕非合作目标后的复合控制

随着空间技术的不断发展，空间飞行器抓取非合作目标的稳定控制技术变得日益重要。基于拉格朗日动力学原则对空间飞行器进行动力学建模，考虑了非合作目标的未知参数、空间飞行器模型的不确定性及存在外部干扰的情况，理论分析了自适应控制及基于非线性干扰观测控制的可行性，并对比了二者的优缺点。在此基础上提出了一种可以在线精确估计非合作目标未知参数的复合控制方法，并进行了仿真验证。仿真结果表明，所提方法能够将所有参数的估计误差限制在很小的范围内，相对于自适应控制方法有了显著改善。

Composited Control of Spacecraft after Grasping Non-cooperative Target

With the continuous development of space technology, the stabilization control for spacecraft to grasp non-cooperative target has become increasingly important. Based on Lagrange dynamics principle, the dynamics model of spacecraft is established. Considering the unknown parameters of non-cooperative target, uncertainty of spacecraft model and external disturbance, the feasibility of adaptive control and nonlinear disturbance-observer-based control are analyzed theoretically, and their advantages and disadvantages are compared. On this basis, a composited control method which can accurately estimate the unknown parameters of non-cooperative target online is proposed and verified by simulation. The simulation results show that the proposed method can limit the estimation errors of all parameters to very small scales, which is significantly improved compared with the adaptive control.