摘要
针对嫦娥五号探测器直接进入地月转移轨道、月面采样、交会对接、高速再入返回,完成主任务后轨道器飞往日地第一拉格朗日平动点等飞行轨道方面的新特点,本文对任务关键节点的定轨预报精度和月面定位精度进行了评估.结果表明,地月空间转移段中途修正前6 h定轨预报至开机点,近月制动前6 h定轨预报至近月点的位置误差为百米精度水平,交会对接期间,第4次远导控后预报至交班点,位置误差约为700 m,主要由上升器自身轨道及控制误差累积造成,使用12 h数据的无线电定位结果可有效满足任务要求.此外,针对嫦娥五号拓展任务,采用重叠弧段分析法,位置误差约500 m.
The Chang’e-5 spacecraft has some new characteristics, such as direct entry into the Earth-Moon transfer orbit, lunar surface sampling, rendezvous and docking, high-speed re-entry and return, and after completing the main mission, the orbiter being able to fly to the first Lagrangian libration point of the Sun-Earth orbit. This paper evaluates the orbit determination and prediction accuracy and lunar surface-positioning accuracy of the mission key nodes. Results showed that the position error of the orbit determination prediction 6 h before midway correction and 6 h before lunar capture is100 m. During rendezvous and docking, the position error is -700 m from the forecast to the handover point after the fourth remote guidance and control. This is caused by the accumulation of the ascent’s orbit and control error. Using 12-h data can effectively meet the task requirements. Besides, for the Chang’e-5 expansion mission, the overlapping arc analysis method is used, and the position error is -500 m.
作者
段建锋
张宇
孔静
欧阳琦
陈明
李翠兰
韩意
段成林
宋辰
慎千慧
DUAN JianFeng;ZHANG Yu;KONG Jing;OUYANG Qi;CHEN Ming;LI CuiLan;HAN Yi;DUAN ChengLin;SONG Chen;SHEN QianHui(Beijing Aerospace Flight Control Center,Beijing 100094,China;Aerospace Flight Dynamics Laboratory,Beijing 100094,China)
出处
《中国科学：物理学、力学、天文学》
CSCD
北大核心
2021年第11期53-61,共9页
Scientia Sinica Physica,Mechanica & Astronomica
基金
国家自然科学基金(编号:11973015)资助项目。
关键词
嫦娥五号
定轨策略
精度评估
拓展任务
Chang’e-5
orbit determination strategy
accuracy evaluation
expansion mission
