摘要
针对我国嫦娥二号卫星拓展任务需求,研究了卫星由日地L2点向L1点的转移轨道方案。基于卫星真实星历,考虑各种摄动因素,借助不变流形理论和微分修正方法,设计了嫦娥二号在日地平动点L1和L2之间的转移轨道,提出了便于理解和工程应用的平动点间直接转移方式,研究了真实力模型下平动点Lissajous轨道的不变流形转移方式,对比了两种转移方式的出发速度增量、转移时间与出发时刻的关系。研究表明,嫦娥二号可以通过直接转移方式或者借助不变流形进入日地L1点Lissajous轨道,直接转移方式下有42天出发机会,基于不变流形方式下最短转移时间为210天,对应速度增量5.776m/s,最小速度增量可达0.024m/s。研究结果可直接应用于我国嫦娥二号拓展任务的轨道设计与控制,并为我国后续平动点等深空探测任务提供有益借鉴。
The CHANG＇E-2 transfer trajectory scheme from the Sun-Earth L2 point to the L1 point is studied to meet the needs of CHANG＇E-2 extended missions.Based on the current CHANG＇E-2 Lissajous trajectory and considering real perturbation,the CHANG＇E-2 transfer trajectory from L2 to L1 is designed by using invariant manifold and differential correction.The transfer trajectory has two ways including the simple direct delta-vtransfer and the one based on invariant manifold.The first way is simple and easy for engineering application.The second way focuses on the invariant manifold of Lissajous orbit under real perturbation.For these two ways,the relation of delta-vand transfer time with departing time is specially investigated.The results show that CHANG＇E-2 can enter the L1 Lissajous trajectory by the two ways and the direct way has a departing chance of 42days.Additionally,the manifold way has the shortest transfer time of 210days with a delta-vof 5.776m/s and the least delta-vof 0.024m/s.The research can be applied directly to the trajectory design and control of CHANG＇E-2 extended missions and to our future libration point mission and deep space exploration.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2014年第7期1386-1391,共6页
Systems Engineering and Electronics
基金
国家自然科学基金(11303001
11203003)
国家高技术研究发展计划(863计划)(2012AA7034057G)资助课题
关键词
嫦娥二号
任务设计
平动点
不变流形
微分修正
CHANG＇E-2
mission design
libration point
invariant manifold
differential correction
