共面快速受控绕飞轨迹设计与控制

Trajectory Design and Control of In-Plane Fast Controlled Flyaround

绕飞运动在航天器在轨服务与在轨支援、辅助航天员舱外活动、航天器编队飞行、空间交会对接等空间活动中具有重要应用。分析了快速受控绕飞的可行性和主要过程,建立了适用于目标航天器运行在圆轨道上的共面快速绕飞和进入绕飞与退出绕飞的轨迹设计模型,采用多速度脉冲控制方法和等角度/等时间控制方式对绕飞轨迹进行控制。仿真计算结果表明所提出的快速受控绕飞轨迹设计模型和控制方法可以实现对圆轨道目标航天器的共面快速受控绕飞。

The flying around motion of spacecraft is a periodic visual motion that a chaser spacecraft encircles a target spacecraft. There are two kinds of flyaround ： natural flyaround and fast controlled flyaround. Flying around satellite has more important applications in on-orbit satellite servicing and on-orbit spacecraft support, supporting the Extra-Vehicular Activity （EVA） of astronaut, spacecraft formation flying, spacecraft rendezvous and docking, etc. This paper is concerned with the trajectory design and guidance problems of a flying around satellite to accomplish in-plane fast controlled flyaround. At first, the feasibility and the process of the fast controlled flyaround are analyzed. Then, a mathematical model, which is applicable to the situation that target spacecraft flies in a circular orbit, used to design and control the in-plane fast controlled flyaround trajectory is presented, which includes in-plane fast flyaround, entering into and exit flyaround. The multi-impulse control method and equal angle equal time control mode is used to fulfill the control of fast controlled flyaround trajectory. Finally, taking into account perturbations and navigation errors which can cause the trajectory unstable and mission impossible some simulation works are carried out. The results indicate the fast flying around mathematical model and the trajectory control method can accomplish the inplane fast controlled flyaround.