垂直着月轨道的特性分析及其近似解

Characteristics and Approximate Solutions of Normalimpact Transfer Trajectory to the Moon

本文采用圆锥曲线拼接方法，建立了垂直着月轨道的数学模型，给出了垂直着月轨道运动特性的简明分析结果。在适当近拟后，获得了垂直着月轨道的解析解，为初步轨道设计提供了实用的工程方法。

A patched-conic technique is used to formulate the mathematical model and to make an explicit analysis of the normal-impact transfer trajcctory to the moon. Some approximations are required in order to obtain the analytical solutions of the normal-impact transfer trajectory to the rnoon. lt is a practical engineering method for preliminary trajectory designing.