航天器工程2019，Vol.28Issue(4)：16-21,6.DOI:10.3969/j.issn.1673—8748.2019.04.004
嫦娥四号着陆器月面定时定点着陆轨道控制策略设计与实施
Design and Implementation of Lunar Landing Orbital Maneuver Strategy at Fixed—time and Fixed—site for Chang’e—4 Lander
摘要
Abstract
The landing zone area of Chang’e—4 lander is only 5% of that of Chang’e—3 lander.In order to meet the mission requirements for high—precision landing in the narrow landing zone on the farside of the moon,based on the orbital maneuver strategy of Chang’e—3 single differential corrections,a high—precision fixed—time and fixed—site lunar landing orbital maneuver strategy with dual differential corrections is proposed.The lunar orbit inclination and semimaj or axis as design variables,the nominal orbits of multiple launch windows landing at fixed—time and fixed—site are designed.Next,the out—of—plane correct maneuvers of lunar orbit inserting and correct maneuver are implemented to reduce maneuver error gradually,which solves the problem of high precision landing at fixed—time and fixed—site caused by the reduction of landing area.When the lander reaches the initial point of the powered descent,the predicted longitude error of the landing site is less than 0.1 degree,and the prediction landing time error is less than 1 minute.The result indicates that the orbital maneuver strategy meets the mission requirements.关键词
嫦娥四号着陆器/月面软着陆/轨道控制策略/定时定点着陆Key words
Chang’e—4 lander/lunar soft—landing/orbital maneuver strategy/fixed—time and fixed—site landing分类
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刘德成,周文艳,高珊,李飞,杨眉..嫦娥四号着陆器月面定时定点着陆轨道控制策略设计与实施[J].航天器工程,2019,28(4):16-21,6.基金项目
国家重大科技专项工程 （）
