中文摘要：

针对快速接近非合作目标航天器任务，提出了一种基于观测器的相对轨道有限时间控制算法．首先，基于非奇异的终端滑模技术，设计了一种有限时间控制器．该控制器可使追踪航天器与目标航天器的相对位置和速度在有限时间内达到期望值．其次，考虑到非合作航天器的逃逸机动，在控制器中引入了一种有限时间观测器，该观测器可在有限时间内估计出目标的逃逸加速度，从而保证闭环系统的全局有限时间收敛．最后，通过数值仿真验证了该控制算法的有效性．

英文摘要：

The observer-based relative orbit finit target spacecraft. A finite-time controller, based firstly proposed to perform proximity maneuver, e-time control is investigate on non-singular terminal sli which can drive relative pos d for rapid proximity to ding mode technique, is tion and velocity to th expected value in finite time rather than in the asymptotic sense. In the consideration of escap maneuver of non-cooperative spacecraft, a finite-time observer is then proposed and included in th modified controller to deal with this problem. It should be noted that the acceleration of escap maneuver can be estimated in finite time, the globally finite-time convergence of dosed-loop system i therefore guaranteed. Simulation results are finally provided and discussed to illustrate thperformance of the proposed controllers.