Journal of Astronautics ›› 2022, Vol. 43 ›› Issue (1): 11-20.doi: 10.3873/j.issn.1000-1328.2022.01.002

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Autonomous Navigation Technology of Tianwen 1 Mars Probe During EDL Process

LI Mao deng, HUANG Xiang yu, XU Chao, GUO Min wen, HU Jin chang,ZHAO Yu, LIU Wang wang, WANG Xiao lei, XU Li jia, WANG Yun peng, HAO Ce   

  1. 1. Beijing Institute of Control Engineering, Beijing 100094, China;2.Science and Technology on Space Intelligent Control Laboratory, Beijing 100094, China
  • Received:2021-09-14 Revised:2021-11-21 Online:2022-01-15 Published:2022-01-15

Abstract: Aiming at the challenges of the large dynamic and strong uncertainty of Mars EDL process to the navigation system, based on the multi sensor information fusion theory, a high fault tolerant and strong autonomous landing navigation algorithm for Tianwen 1 is designed to achieve the accurate and reliable estimates of navigation state in the case of large uncertainty of EDL process, multi sensor failure and loss of attitude reference caused by gyro saturation. The effectiveness of the navigation design has been verified by the actual flight results of Tianwen 1.

Key words: Tianwen 1, Entry, descent and landing process, Autonomous navigation, Information fusion

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