从地面发射月球探测器的窗口选择

WINDOW SELECTION FOR THE LUNAR PROBE LAUNCHED FROM THE EARTH

典型的月球探测器飞行轨道包括地球停泊轨道段、地月转移轨道段、月球卫星轨道段和着月轨道段 .首先介绍了设计从地面发射月球探测器轨道典型的约束条件 ;然后 ,借助于二体假设 ,建立解析表达式 ,分析各种约束对窗口选择的影响 ,给出了各轨道段概略的飞行时间和粗窗口 ;最后 ,利用精确的探测器轨道动力学模型 ,计算精窗口 ,并给出了一则算例 .所得结论可为月球探测器轨道发射、轨道设计提供依据 .

A typical orbit of lunar probe includes earth parking orbit segment, earth-moon transfer orbit segment, lunar satellite orbit segment and moon-landing orbit segment. In this paper, firstly, the typical constraint conditions of orbital design of lunar probe launched from the earth are introduced. Then, by using the hypothesis of two body problem, a series of formulae are set up for analyzing the influence caused by every constraint condition, and the flight time and sketchy windows of every segment are given. Lastly, according to the precise dynamical model of the probe, the precise windows are computed and an example of window selection is provided.