Powered-descent landing GNC system design and flight results for Tianwen-1 mission

IF 2.7 1区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Astrodynamics Pub Date : 2022-01-04 DOI:10.1007/s42064-021-0118-9

Xiangyu Huang, Chao Xu, Jinchang Hu, Maodeng Li, Minwen Guo, Xiaolei Wang, Yu Zhao, Baocheng Hua, Yunpeng Wang

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引用次数: 6

Abstract

The powered-descent landing (PDL) phase of the Tianwen-1 mission began with composite backshell—parachute (CBP) separation and ended with landing-rover touchdown. The main tasks of this phase were to reduce the velocity of the lander, perform the avoidance maneuver, and guarantee a soft touchdown. The PDL phase overcame many challenges: performing the divert maneuver to avoid collision with the CBP while simultaneously avoiding large-scale hazards; slowing the descent from approximately 95 to 0 m/s; performing the precise hazard-avoidance maneuver; and placing the lander gently and safely on the surface of Mars. The architecture and algorithms of the guidance, navigation, and control system for the PDL phase were designed; its execution resulted in Tianwen-1’s successful touchdown in the morning of 15 May 2021. Consequently, the Tianwen-1 mission achieved a historic autonomous landing with simultaneous hazard and CBP avoidance.

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“天文一号”动力下降着陆GNC系统设计及飞行结果

“天文一号”任务的动力下降着陆(PDL)阶段以复合背壳-降落伞(CBP)分离开始，以着陆车着陆结束。这一阶段的主要任务是降低着陆器的速度，执行规避机动，并保证软着陆。PDL阶段克服了许多挑战:进行转向机动以避免与CBP相撞，同时避免大规模危险;将下降速度从大约95米/秒降至0米/秒;执行精确的危险规避机动;并将着陆器轻轻地安全地放置在火星表面。设计了PDL相位制导、导航和控制系统的体系结构和算法;它的执行导致了“天文一号”在2021年5月15日上午成功着陆。因此，“天文一号”任务实现了历史性的自主着陆，同时避免了危险和CBP。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Astrodynamics Engineering-Aerospace Engineering

CiteScore

6.90

自引率

34.40%

发文量

期刊介绍： Astrodynamics is a peer-reviewed international journal that is co-published by Tsinghua University Press and Springer. The high-quality peer-reviewed articles of original research, comprehensive review, mission accomplishments, and technical comments in all fields of astrodynamics will be given priorities for publication. In addition, related research in astronomy and astrophysics that takes advantages of the analytical and computational methods of astrodynamics is also welcome. Astrodynamics would like to invite all of the astrodynamics specialists to submit their research articles to this new journal. Currently, the scope of the journal includes, but is not limited to:Fundamental orbital dynamicsSpacecraft trajectory optimization and space mission designOrbit determination and prediction, autonomous orbital navigationSpacecraft attitude determination, control, and dynamicsGuidance and control of spacecraft and space robotsSpacecraft constellation design and formation flyingModelling, analysis, and optimization of innovative space systemsNovel concepts for space engineering and interdisciplinary applicationsThe effort of the Editorial Board will be ensuring the journal to publish novel researches that advance the field, and will provide authors with a productive, fair, and timely review experience. It is our sincere hope that all researchers in the field of astrodynamics will eagerly access this journal, Astrodynamics, as either authors or readers, making it an illustrious journal that will shape our future space explorations and discoveries.