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针对月球南极探测任务,综合考虑中国地基深空测控系统现状、月球南极地区光照及地球再入终端等约束条件,利用月球反垂点概念,提出一种从环月轨道出发的三级返回窗口搜索策略.其次,提出一种改进多圆锥截线法,将月球非球形摄动加入到区间的轨道外推中,基于二级返回窗口对返回轨道进行了初步设计.给出以月球南极地区Shackleton撞击坑边缘一点为假定落点,于2020年自月球南极地区返回的仿真算例.仿真结果表明:一方面,窗口搜索方法可以有效解决多约束条件下的月球南极返回窗口设计问题;另一方面,改进多圆锥截线法作为一种初始轨道设计方法,可以有效减少再入误差,同时为后续高精度轨道积分提供良好初值.
In view of the lunar Antarctic exploration mission, considering the current situation of deep space TT & C systems in China, the lunar Antarctic region illumination and the earth reentry terminal, the concept of anti-drop point of lunar is used to propose a three-level return window search from lunar orbit Strategy.Secondly, an improved multi-cone cross-section method is proposed to add the lunar non-spherical perturbation into the extrapolation of the orbit, and the initial orbit is designed based on the second-order return window.According to the lunar Antarctic Shackleton collision On the one hand, the window search method can effectively solve the design problem of lunar Antarctic return window with multiple constraints; on the other hand, As an initial orbit design method, the improved multi-cone cross-section method can effectively reduce the reentry error and provide a good initial value for subsequent high-precision orbit integration.