非合作目标自主交会的开关控制

针对面向非合作目标的航天器相对轨道动力学系统,研究了基于视线制导的开关控制问题。详细推导了视线相对运动模型,并定性分析了重力差项。基于相平面法,分别独立设计了横向和纵向相对运动通道的开关曲线控制算法。针对横向控制,基于比例导引律设计了开关曲线,并利用李雅普诺夫方法给出了稳定性证明。针对纵向控制,采用双开关曲线,并给出了一种相应的设计方法。数值仿真分析验证了所提出的开关控制方法的有效性。

Switching control for autonomous rendezvous to non-cooperative target

For the spacecraft relative orbit dynamical system respect with respect to non-cooperative target, the switching control problem based on line of sight (LOS) guidance is investigated. A nonlinear LOS relative motion dynamics model is established, and the gravity difference term is analyzed qualitatively. Based on the phase plane method, the switching cure control methods of the lateral and longitudinal relative motion channels are designed separately. For the lateral control channel, a switching curve strategy based on the proportional guidance law is given, and the stability is guaranteed by the method of Lyapunov. For the longitudinal control channel, the double switching curve is adopted, and a design method is given. Numerical simulation results validate the fine performance of the proposed control schemes.