Journal of Astronautics ›› 2021, Vol. 42 ›› Issue (11): 1385-1395.doi: 10.3873/j.issn.1000-1328.2021.11.005

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Plan Repair Method of Deep Space Probe Based on the Expected State Sequence

CHEN Chao, XU Rui, LI Zhao yu, ZHU Sheng ying, LIANG Zi xuan   

  1. 1. School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China;2. Key Laboratory of Autonomous Navigation and Control for Deep Space Exploration, Ministry of Industry and Information Technology, Beijing 100081, China

  • Received:2021-01-07 Revised:2021-03-09 Online:2021-11-15 Published:2021-11-15

Abstract: Aiming at the challenges caused by the persistence, concurrency and energy consumption of probe actions, a plan repair method of deep space probe based on the expected state sequence is proposed. In this method, the expected state sequence is formed of the expected effect of the unfinished action and the expected precondition of the unexecuted action in the pre designed plan, according to the execution status of the action. The expected state sequence is an ordered set of states with mixed logic and energy, providing subgoals for plan repair and also transforming the plan repair problem into the state transition path searching problem. During the search, the plan repair strategy with energy supply priority is proposed, which separates the logic repair from energy repair to reduce the difficulty of solving the problem. And this method enables the probe to recover from plan failure autonomously. Finally, the effectiveness and rationality of the proposed method are verified through simulation by taking the Mars Orbiter as an example.

Key words: Expected state sequence, Deep space probe, Plan repair, Plan execution failure

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