无动力双小行星探测器的鲁棒释放策略  

Robust Release Strategy for Unpowered Probes in Weak Gravity Binary Asteroid Systems

作　　者：刘学文 席涛 李爽[1] LIU Xuewen;XI Tao;LI Shuang(Colleage of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016;State Key Laboratory of Science and Technology on Aerospace Flight Dynamic,Xi'an 710043)

机构地区：[1]南京航空航天大学航天学院,南京210016 [2]宇航动力学国家重点实验室,西安710043

出　　处：《飞控与探测》2024年第5期10-19,共10页Flight Control & Detection

基　　金：国家自然科学基金(11672126)。

摘　　要：针对无动力探测器的双小行星表面着陆问题,考虑了实际工程任务中导航与控制系统不可避免地存在偏差情况,基于着陆器与天体表面弹跳接触的无控表面附近探测动力学分析结果,提出了无动力着陆器鲁棒释放策略设计方法。利用蒙特卡罗仿真对导航和控制误差造成的着陆轨迹末端状态误差进行不确定性分析。通过对从周期轨道释放、从自然平动点释放和从外部区域悬停点释放等3种不同的初始轨道进行全面分析,总结无动力着陆器释放的鲁棒性与安全性,得到最优的鲁棒释放策略。In response to the landing problem of unpowered probes in weak gravity binary asteroid systems,a robust release strategy design method for unpowered probes is proposed based on the dynamics model of the vicinity of the surface in contact with the bouncing contact between the probes and the body,considering the inevitable deviation of the navigation and control systems in engineering.Use Monte Carlo simulation to analyze the uncertainty of landing trajectory end state errors caused by navigation and control errors.By conducting a comprehensive analysis of three different initial trajectories:release from periodic orbits,release from Lagrange points,and release from external hovering points,the robustness and safety of the release of the unpowered probes are summarized,and the optimal robust release strategy is obtained.

关 键 词：双小行星系统 椭球体-椭球体模型 不确定性 低能着陆 

分 类 号：V529.1[航空宇航科学与技术—人机与环境工程]