Systems Engineering and Electronics ›› 2021, Vol. 43 ›› Issue (4): 1057-1068.doi: 10.12305/j.issn.1001-506X.2021.04.24

• Guidance, Navigation and Control • Previous Articles     Next Articles

Fast initial relative orbit determination method of angles-only relative navigation

Ronghua DU(), Xiang ZHANG*(), Wenhe LIAO()   

  1. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
  • Received:2020-06-22 Online:2021-03-25 Published:2021-03-31
  • Contact: Xiang ZHANG E-mail:Duronghua1995@126.com;zhxiang2002@126.com;cnwho@mail.njust.edu.cn

Abstract:

For the problem of unobservable inter-satellite distance of angles-only relative navigation caused by the linear measurement model and relative motion model, a fast initial relative orbit determination (IROD) method of angles-only relative navigation is proposed. Firstly, the relative orbit elements (ROE) is used to establish a nonlinear relative motion model, which can decouple the inter-satellite distance and the relative orbital shape. Then, the inter-satellite distance near the collinear solution obtained by linear theory is changed, systematically, and a series of least-square fitting is performed, and then the dichotomy or Newton iteration method is used to find the optimal solution of the minimum fitting residual quickly in the global range. Finally, a semi-physical simulation platform is built to test the performances of the method in 4 orbital scenarios, and the effectiveness of the proposed method is verified.

Key words: angles-only relative navigation, initial relative orbit determination (IROD), dichotomy method, Newton iteration method, least-square fitting

CLC Number: 

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