击中月球的转移轨道研究

对击中月球的转移轨道进行了全局性的研究，对这种转移轨道的要求是，近地点高度及飞行时间都是预先确定的，采用一种十分有效的算法，可以方便地找出所有满足要示转移轨道，这种方法的关键是利用初始状态终极状态的状态转移矩阵进行迭代，给出了这些转移轨道和近地点和着月点的轨迹，并讨论了轨迹随飞行时间变化的特性，研究结果表明，对于任意的轨道倾角都可以到两条满足要求的转移轨道。

Investigation on Translunar Trajectories for Lunar Impact

A global investigation on translunar trajectories for lunar impact is carried out in this paper. The requirement for the trajectories is that the height of perigee and the transfer time are all pre determined. A very effective method is employed with which all trajectories can be searched out. The key of this method is to apply the state transfer matrix between the initial state and the end state for iteration. In addition, the locus of perigee and lunar impact points are given and the characteristic of the locus with variation of the transfer time are discussed. The results show that there are always two trajectories meeting the requirement for an initial orbit with any inclination.