摘要
深空探测承载了人类对宇宙奥秘的孜孜追寻,而小天体是其中不可或缺的重要目标,对于探索行星形成、寻找生命起源、防御其撞击地球以及空间资源开发利用等具有重要的科学意义.本文意识到小天体接触探测热潮已经悄然来临,首先回顾了各大航天机构已实施的多次小天体任务,然后分析了弱引力环境下小天体地表颗粒层给接触探测带来的挑战和风险,阐释了小天体接触探测颗粒动力学问题的基本特点与科学价值;进一步详细介绍了探测器表层操作中以及空间作用下颗粒风化层的多尺度动力学行为相关的研究进展;最后,展望了该研究方向的未来发展趋势.
Exploring the vast universe is a shared dream of humankind,and small bodies are indispensable targets that can provide crucial information regarding the formation of the Solar System,the emergence of life on the early Earth,defending our planet from impact hazards,and utilizing the planetary resources.In the context of the forthcoming boom in small-body touchdown exploration,first,the history of previous small-body missions was reviewed,and the great challenge posed by their granular regolith surfaces to touchdown operations was analyzed.The scientific value of granular dynamics for small-body touchdown missions was summarized.Subsequently,the development in the study of the multiscale dynamics behavior of granular regolith driven by surface operations and geophysical forces was examined in detail.Finally,the future research direction was discussed.
作者
程彬
于洋
宝音贺西
CHENG Bin;YU Yang;BAOYIN HeXi(School of Aerospace Engineering,Tsinghua University,Beijing 100084,China;School of Aeronautic Science and Engineering,Beihang University,Beijing 100191,China)
出处
《中国科学：技术科学》
EI
CSCD
北大核心
2021年第11期1299-1314,共16页
Scientia Sinica(Technologica)
基金
国家重点研发计划(编号:2019YFA0706500)资助项目。
关键词
小天体
风化层
颗粒动力学
深空探测
接触附着
small bodies
regolith
granular dynamics
deep space exploration
touchdown
