地月空间飞行轨道分层搜索设计

通过对地月间飞行轨道特征进行分析，根据不同的终端约束条件，提出了分层搜索的轨道设计方法。其基本思想首先是将月球视为质点，解决空间两质点的相遇问题，其次进一步视月球为球体，完成二体假设下的B平面瞄准，最后在前两步基础之上，根据具体目标条件约束得到精确的轨道。本文详细清晰地给出该方法的设计过程，很好地解决了地月空间轨道搜索的快速收敛性问题，对深空探测器轨道设计有借鉴意义。

Cislunar Trajectory Design Using Searching Step by Step Method

Through the analysis on the cislunar trajectory, and according to the different terminal constraints, the searching step by step method is provided to design the accurate trajectory. The idea is as follows. First of all, the moon is regarded as a point, and the problem of two points encountering in space is solved. Secondly, the moon is looked as a body, the B-Plane targeting is completed under idealized two-body hypotheses. Lastly, the accurate trajectory is obtained according to specific objective conditions considering all effects. The process is given in detail in the paper and the convergence of searching cislunar trajectories is quickly achieved. The method provides a new way for trajectory design of the deep-space spacecraft.