嫦娥五号月面表取采样点选择  

Lunar surface sampling point selection of Chang’E 5

作　　者：郑燕红[1] 邓湘金[1] 顾征[1] 金晟毅[1] 李青[1] ZHENG Yan-hong;DENG Xiang-jin;GU Zheng;JIN Sheng-yi;LI Qing(Beijing Institute of Spacecraft System Engineering,Beijing 100094,China)

机构地区：[1]北京空间飞行器总体设计部,北京100094

出　　处：《光学精密工程》2021年第12期2935-2943,共9页Optics and Precision Engineering

基　　金：国家中长期科技发展规划重大专项;中国航天科技集团青年拔尖人才基金项目;国家自然科学基金项目(No.61773383)。

摘　　要：嫦娥五号探测器成功实现了我国首次地外天体采样返回,利用表取采样方式顺利完成了月面多点样品采集工作。根据嫦娥五号探测器特点,阐述了表取采样工作过程,分析了斜侧安装的监视相机可视覆盖区域,并形成了适应于光照不均匀、纹理高度相似场景的月面三维数字重构流程。然后,结合表取采样机械臂与器表设备构型布局情况,构建了表取采样可达约束条件,进行了可视可达区分析。并针对任务采用的一类大尺度采样器,提出了数字仿真分析与物理实物验证相结合的采样点确定方法。嫦娥五号月面工作期间,利用该方法通过分析、仿真与物理验证,实现了平均精度优于1 cm的物理地形重建,确定了周向安全间距不小于15 cm、纵向安全间距不小于2 cm的采样点族,结果表明该方法确定的采样点正确、安全,有效支持了嫦娥五号表取采样活动。The Chang’E 5 explorer successfully realized China’s first mission of sampling and returning from an extraterrestrial body.Multi-point lunar samples were collected using the surface sampling mode.The process of surface sampling was expounded according to the characteristic of Chang’E 5.The cover⁃age of the monitoring cameras,which were mounted obliquely,was analyzed.Further,a three-dimension⁃al(3D)digital reconstruction workflow adapted for uneven illumination and high similarity texture scene was developed.Considering the layout of the surface sampling manipulator and other surface devices of the lander,the reachable constraint condition of the sampling monition was structured.Moreover,the sam⁃pling area,which was visible and reachable,was discussed.Aiming at a class of large-scale samplers,a multi-sampling point selection method combining digital simulation and physical verification was proposed.Subsequently,the proposed method consisting of analysis,simulation,and verification was applied in the Chang’E 5 surface sampling task.An average precision of less than 1 cm was realized for the reconstruc⁃tion of the physical terrain.Additionally,the sampling points that had circumferential safety spacing great⁃er than 15 cm and longitudinal safety spacing greater than 2 cm were confirmed.The mission results indi⁃cated that the sampling points were correct and reliable.The method effectively supported the Chang’E 5′in its surface sampling activities.

关 键 词：嫦娥五号 表取采样 采样点 可视区 可达区 

分 类 号：V447.1[航空宇航科学与技术—飞行器设计]