Systems Engineering and Electronics ›› 2023, Vol. 45 ›› Issue (12): 3984-3994.doi: 10.12305/j.issn.1001-506X.2023.12.29

• Guidance, Navigation and Control • Previous Articles    

Multi-line-of-sight fusion based configuration design for near-field situation awareness in high orbit

Dawei FAN, Weiwei CAI, Leping YANG, Runde ZHANG   

  1. College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • Received:2022-10-31 Online:2023-11-25 Published:2023-12-05
  • Contact: Weiwei CAI

Abstract:

For the problem of near-field situation awareness (NSA) of high orbit satellite, this paper proposes a multi-satellite cooperative NSA scheme based on multi-line-of-sight (LOS) fusion and studies the method of configuration design with the consideration of relative state estimation's accuracy and sunlight constraint. Firstly, based on the system state equation, measurement equation, and extended Kalman filter algorithm, the NSA model with multi-LOS fusion is proposed. Secondly, through theoretical analysis, the configuration optimization criterion that the more the LOS angle approaching 90°, the smaller the target position estimation error is proposed. Thirdly, considering the constraints of sunlight and bounded relative motion, the configuration optimization strategy for NSA is proposed, which is transformed to a nonlinear programming problem solved by the penalty function method. Finally, numerical simulations are conducted to validate the effectiveness of the proposed multi-LOS fusion NSA model, configuration optimization design criterion, and configuration optimization strategy of NSA.

Key words: multi-spacecraft, angle-only, near-field situation awareness (NSA), configuration design, non-cooperative target

CLC Number: 

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