Journal of Astronautics ›› 2015, Vol. 36 ›› Issue (3): 292-299.doi: 10.3873/j.issn.1000-1328.2015.03.007

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Distributed Relative Navigation of GEO Non Cooperative Target Based on Multiple Line of Sight Measurements

GAO Xue hai, LIANG Bin, PAN Le, DU Xiao dong   

  1. 1. School of Aerospace, Harbin Institute of Technology, Harbin 150001, China;
     2. Aerospace Dongfanghong Development Ltd. Shenzhen, Shenzhen 518054, China;
    3. China Academy of Space Technology, Beijing 100094, China
  • Received:2014-02-12 Revised:2014-04-22 Online:2015-03-15 Published:2015-03-25

Abstract:

Only using single line-of-sight, it is difficult for a space robot to perform autonomous relative navigation of Geostationary orbit (GEO) non-cooperative target in long-range rendezvous. To overcome this problem, a distributed relative navigation method based on multiple line-of-sights of two space robots is proposed. Firstly, the multiple line-of-sight measurements based relative navigation model is built and the equation of relative motion dynamics between space robot and non-cooperative target are introduced. Secondly, a distributed filter of relative navigation is presented to reduce the dimension of centralized filter. The relative position is estimated by using the extend Kalman filter algorithm. Thirdly, numerical simulations are studied to verify the method under different conditions. The results show that this method is steady and effective.

Key words: Non-cooperative target, Multiple line-of-sights, Distributed relative navigation, Geostationary orbit, Space robot

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