地月循环轨道动力学建模与计算研究

根据地月循环轨道的概念，按照生成第二类周期轨道的弧段进行分类，并讨论了其共振性与对称性在轨道设计与应用中的作用。然后归纳了三种循环轨道的动力学建模与计算方法及其轨道延拓策略，最后总结了三种方法的利弊和应用轨道类型。对地月系统循环轨道的研究和分析，能够为我国未来载人登月工程提供一种新的思路与理论支持。

Dynamics Modeling and Calculation of Cycler Trajectories in the Earth Moon System

The cycler trajectory concept in the earth-moon system is an alternative approach to developing and maintaining large-scale space transportation with long duration and low cost for manned lunar mission, and its trajectory design is the first step to achieve the architecture. First, the desired orbits are classified by using orbit arcs generated by the second species according to the cycler trajectory concept in the earth-moon system. Then the functions of its resonance and symmetry in the design and application of cycler trajectories are discussed. Furthermore, three kinds of methods for dynamics modeling and calculation of cycler trajectories are concluded as well as their pros and cons. The continuation strategies are also introduced for generating families of cycler trajectories. This study and survey about cycler trajectories in the earth-moon system could provide a new insight and reference for the manned lunar landing project of China in future.