地月系拉格朗日L_1点低能探月轨道分析  

Study of Low Energy Transfer to Moon of L_1 Point in Earth-Moon System

作　　者：晁宁[1] 李言俊[1] 

机构地区：[1]西北工业大学航天学院,陕西西安710072

出　　处：《计算机测量与控制》2010年第7期1633-1636,共4页Computer Measurement &Control

基　　金：高等学校博士学科专项科研基金(20060699024)

摘　　要：利用不变流形能够实现平衡点与行星之间的低能耗过渡;从地月系L1点晕轨道向月球圆停泊轨道具有多种零消耗转移轨道,但不同轨道的能耗和转移时间等指标不尽相同;利用圆限制性三体模型对地月系轨道进行了理论分析和L1点晕轨道计算;列举了地月系L1点不同幅值晕轨道及其不变流形的各项指标,分析了L1点不稳定流形所能够到达月球附近的情况,从中选取出了变轨和霍曼转移后能耗和时耗均最优的转移轨道,为探月工程的轨道设计提供了一个参考标准。Low energy cost transfer between Libration points and planets can be achieved by using invariant manifold. There are many kinds of zero--cost transfer trajectories from L1 to round parking orbits, but the energy cost, time cost of different trajectories are also differ- ent. Therefore, theory analysis of Earth--Moon system and halo orbits calculation of L1 point are done based on circular restricted three-- body problem model. Several kinds of characteristics of different amplitude halo orbits and invariant manifold are calculated. The situation of teachability of unstable manifold from L1 to the Moon is analyzed and the trajectory costing the least time and energy after Hohmann transfer is selected which is valuable for the practical Lunar exploration projects use.

关 键 词：拉格朗日点 平动点 晕轨道 探月轨道 不变流形 

分 类 号：V412.4[航空宇航科学与技术—航空宇航推进理论与工程]