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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2021, Vol. 42 ›› Issue (1): 524174-524174.doi: 10.7527/S1000-6893.2020.24174

• Dissertation • Previous Articles     Next Articles

Multiple line-of-sight angles-only relative navigation by multiple collaborative space robots

HAN Fei1,2, LIU Fucheng1,2, WANG Zhaolong1,2, DU Xuan3, LIU Shanshan1,2, LIU Chaozhen1,2   

  1. 1. Shanghai Aerospace Control Technology Institute, Shanghai 201109, China;
    2. Shanghai Key Laboratory of Aerospace Intelligent Control Technology, Shanghai 201109, China;
    3. Shanghai Academy of Spaceflight Technology, Shanghai 201109, China
  • Received:2020-04-30 Revised:2020-06-04 Published:2020-08-07
  • Supported by:
    National key Research and Development Program (2016YFB0501003);Major Projects of the National Natural Science Foundation of China (61690214)

Abstract: This paper focuses on multiple Line-of-Sight (LOS) angles-only relative navigation of multiple collaborative space robots for non-cooperative targets. To improve the relative navigation performance by fusing multi-LOS information, we propose a multi-LOS relative navigation method based on observability optimization. A relative dynamic model and a state equation between the center robot and the non-cooperative target as well as the observation equation of the multi-robot LOS are firstly developed, and the multi-LOS angles-only relative navigation system is then studied. After that, the angle condition of the multi-LOS with optimal observability is obtained, and a method for the observation configuration optimization of multiple space robots is proposed, considering the observability and long-term natural maintenance. Finally, the simulation results show that the method can significantly improve the range state observability and estimation performance, therefore having good application prospect in space missions.

Key words: space robots, angles-only, relative navigation, multiple line-of-sight collaboration, observability, configuration

CLC Number: