Systems Engineering and Electronics ›› 2021, Vol. 43 ›› Issue (2): 434-442.doi: 10.12305/j.issn.1001-506X.2021.02.18

• Systems Engineering • Previous Articles     Next Articles

Analysis and evaluation method of navigation satellite constellation backup strategy based on Petri net

Xuyu WANG(), Min HU(), Xueyang ZHANG(), Yulong ZHAO(), Jiuyang LI()   

  1. Academy of Space Command, Space Engineering University, Beijing 101416, China
  • Received:2020-04-15 Online:2021-02-01 Published:2021-03-16

Abstract:

Aiming at the backup strategy of the medium orbit earth Walker navigation constellation of BDS-3, an analysis and evaluation method based on stochastic time Petri net (STPN) is proposed. By building a three layers STPN model of satellite, orbital plane and navigation constellation, the logical behavior characteristics of constellation operation and the timing relationship of operation event under different backup strategies are analyzed. The availability model and operation cost model of the navigation constellation are established as the evaluation index of the backup strategy of the navigation constellation. Finally, the Monte Carlo method is used to evaluate the accuracy of the proposed analysis model, and the optimal backup strategy of the constellation under different conditions is obtained based on the minimum cost under the availability. The results show that the method can effectively analyze the influence of the different backup strategies on constellation operation parameters, and provide quantitative bais for the design and optimization of the navigation constellation backup strategy.

Key words: Walker navigation constellation, Petri net, backup strategy, availability, operation cost, Monte Carlo simulation

CLC Number: 

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