探测器垂直击中月球的轨道设计

ORBITAL DESIGN OF VERTICAL HITTING MOON PROBE

本文讨论了探测器从低高度圆形地球停泊轨道入轨点出发、在停泊轨道上滑行一段后、沿速度方向加速进入登月轨道、自由飞行击中月球的轨道设计．在着月的速度、角度、时间、区域、停泊轨道和能量限制等约束下，首先借助二体、双二体理论，不仅提供了轨道初值的近似值，而且说明了轨道的特性．然后利用广义限制性四体动力学模型，进行3点边值搜索，得到高精度的探测器轨道．

In this paper, the problem of orbital design of vertical hitting moon probe is discussed. The probe starts from a near-earth circular parking orbit and accelerates in the velocity direction of the parking orbit then enters the landing moon orbit and finally hits the moon with free flight, Firstly,in the constraint conditions of the parking orbit,energy limit,and the landing moon point using theories of two-body and double two-boby, not only the approximate initial values of the orbit are given,but also the characteristics of it are illustrated. Then, based on a dynamic model of general restricted four-boby, three point boundary values are searched and the high accuracy orbit of the probe is gained.