主动卸载模式下嫦娥四号中继星轨道确定  

Orbit Determination of Chang’E⁃4 Relay Satellite under Active Off⁃loading Mode

作　　者：孔静[1] 胡国林[1] 李柯 李国强 刘俊琦 李皓皓 杨小锋 Kong Jing;Hu Guolin;Li Ke;Li Guoqiang;Liu Junqi;Li Haohao;Yang Xiaofeng(Beijing Aerospace Control Center,Beijing 100094,China)

机构地区：[1]北京航天飞行控制中心,北京100094

出　　处：《航天控制》2023年第5期27-32,共6页Aerospace Control

基　　金：国家自然科学基金(41874183)。

摘　　要：针对嫦娥四号中继星主动卸载模式,提出了一种引入姿态信息的卸载力建模与解算方法。分析了主动卸载的原理,嫦娥四号中继星姿控发动机布局、卸载控制方式决定其卸载的速度增量集中在本体系+zb方向;根据姿态信息建立了在惯性系下解算本体系速度增量的数学模型;通过该方法对嫦娥四号中继星跟踪数据进行处理分析。结果表明,提出的方法可以有效改进嫦娥四号中继星halo轨道精度,卸载后1.5 d轨道重建的位置精度小于1 km,速度精度优于4 mm/s;预报2~3 d的位置精度为1.2 km,速度精度优于5 mm/s。A modeling and solving method of off⁃loading force by introducing attitude information is pro⁃posed in this paper.Firstly,the principle of active unloading is introduced.The attitude control engine lay⁃out and off⁃loading control mode determine that the delta⁃v of off⁃loading is concentrated in body coordinate system+zb direction.According to the attitude information obtained,a mathematical model for solving the delta⁃v under the inertial system is established.Finally,the tracking data of Chang’E⁃4 relay satellite are processed and analyzed.The results show that the method proposed in this paper can effectively improve the orbital precision,the position precision of orbit reconstruction one and a half day after off⁃loading is less than 1 km,the velocity precision is better than 4 mm/s,and the prediction position precision is 1.2 km for 2~3 days,and the velocity precision is better than 5 mm/s.

关 键 词：嫦娥四号中继星 姿态控制 主动卸载 轨道确定 精度评估 

分 类 号：V412.41[航空宇航科学与技术—航空宇航推进理论与工程]