【作者】 李明涛； 郑建华； 于锡峥； 高东；

【Author】 LI Ming-tao ZHENG Jian-hua YU Xi-zheng GAO Dong (Center for Space Science and Applied Research,Chinese Academy of Sciences,Beijing 100080,China)

【机构】 中国科学院空间科学与应用研究中心；

【摘要】 地月系L2点附近的Halo轨道在月球探测中有着重要作用,但由于与其相连的不变流形无法与近地停泊轨道相交,从地球出发的转移轨道往往需要消耗较多的速度增量。本文研究月球借力飞行在地月系L2点Halo轨道转移轨道中的应用,给出一种在月球附近进行流形插入机动的两脉冲转移轨道设计方法,并针对不变流形段飞行时间长、与月球交会位置不可控的局限性,研究了分别在停泊轨道、月球附近、Halo轨道插入点进行机动的三脉冲转移方式。仿真结果表明:应用月球借力飞行比直接转移节省约300-500m/s的速度增量。最后提出了一种结合月球借力飞行和IPS理论的月球探测新方案,该方案既具有传统直接转移飞行时间短的优点,又具有弱稳定转移燃料消耗少的优点,在未来月球探测和开发中具有的良好应用前景。更多还原

【Abstract】 Halo orbits in the vicinity of Earth Moon L2 collinear iibration point play important role in lunar exploration.However,since the invariant manifolds associated with these halo orbits could not intersect with LEO Earth parking orbits,a large amount of maneuver velocity is needed for direct transfers from LEO Earth parking orbits to LL2 halo orbits.This paper studies the application of lunar flybys for the transfer from the Earth to LL2 halo orbits.Two impulse transfer involving manifold injection maneuvers in the vicinity of the Moon was proposed.To overcome the defects that the transfer time of the manifold patch was long and the position to intersect with the Moon was uncontrolled,three impulse transfer with maneuvers at the Earth parking orbit,the vicinity of the Moon and the halo orbit insertion point was studied.Simulation results show that the proposed transfer using lunar flyby saves about 300-500m/s maneuver velocity relative to direct transfers.Finally,an innovative lunar exploration concept combined lunar flybys and IPS was proposed,the proposed lunar exploration concept not only has the short transfer time behavior of traditional direct transfers, but also has the less fuel consumption behavior of WSB transfers,thus is of high value in future lunar exploration.更多还原