当前位置: X-MOL 学术Planet. Space Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Surface Accessibility with vertical controlled landing on 67P / Churyumov-Gerasimenko
Planetary and Space Science ( IF 2.4 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.pss.2020.105020
A. Probst , A. San Martín , A. Zimmer , S. Broschart , R. Förstner

Abstract With the increasing interest of small body science due to its important role in the puzzle of the solar system formation, missions to small bodies are studied and developed in preparation for future exploration. Together with the operational experience gained and the general rapid technology development, landers and surface mobility elements enable more and more an enhancement of the scientific mission return by collecting in-situ measurements or samples of the surface. Hence, the descent and landing operations become a vital part in a successful execution of the mission. In this paper, a descent strategy for a vertical landing on small bodies is presented. A controlled descent and landing sequence is proposed as opposed to ballistic descents used in previous small body landers (Ulamec and Biele, 2009). The analysis aims for a generic investigation of the surface accessibility of a small body on the example of the comet 67P/Churyumov-Gerasimenko. A vertical controlled descent trajectory concept is proposed and applied to all surface facets of the downscaled ESA polyhedron shape model (released in 2015 (ESA, 2015)). The trajectories are assessed by their duration of descent, Δ v need and their surface accessibility with respect to safety distances to the surface and the canyon walls. The analysis results in Δ v need ranges between Δ v m i n = 0.7 m s−1 and Δ v m a x = 3.1 m s−1, the duration of descent between t m i n = 65 min and t m a x = 275 min. If a minimum distance of 175 ​m to the canyon surface or walls is considered as safe, 90% of the comet’s surface is accessible with the described implemented strategy.

中文翻译:

在 67P / Churyumov-Gerasimenko 上垂直控制着陆的表面可达性

摘要 随着小天体科学因其在解决太阳系形成之谜中的重要作用而受到越来越多的关注,研究和开发了小天体任务,为未来的探索做准备。连同获得的操作经验和普遍的快速技术发展,着陆器和表面机动元件通过收集表面的原位测量或样本,越来越多地增强了科学任务的回报。因此,下降和着陆操作成为成功执行任务的重要组成部分。在本文中,提出了在小物体上垂直着陆的下降策略。提出了一种受控下降和着陆序列,而不是以前的小型着陆器中使用的弹道下降(Ulamec 和 Biele,2009 年)。该分析旨在以 67P/Churyumov-Gerasimenko 彗星为例,对小天体的表面可达性进行一般性研究。提出了垂直控制下降轨迹概念,并将其应用于缩小的 ESA 多面体形状模型(2015 年发布(ESA,2015))的所有表面。轨迹通过它们的下降持续时间、Δ v 需求以及它们与地表和峡谷壁的安全距离相关的地表可达性来评估。分析结果中的 Δ v 需要范围介于 Δ vmin = 0.7 ms−1 和 Δ vmax = 3.1 ms−1 之间,下降持续时间介于 tmin = 65 min 和 tmax = 275 min 之间。如果认为到峡谷表面或墙壁的最小距离为 175 米是安全的,那么使用所描述的实施策略可以到达 90% 的彗星表面。
更新日期:2020-11-01
down
wechat
bug