Journal of Astronautics ›› 2013, Vol. 34 ›› Issue (8): 1106-1114.doi: 10.3873/j.issn.1000-1328.2013.08.011

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A Cooperative Navigation Estimation Method in Distributed Satellite System

WANG Xiao chu,  YOU Zheng,  ZHAO Kai chun,  LI Bin   

  1. State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing 100084, China
  • Received:2012-12-21 Revised:2013-03-19 Online:2013-08-15 Published:2013-08-25

Abstract:

To solve the cooperative navigation problem for a cooperative target with distributed satellites, a cooperative navigation estimation method combined a front end with a back end is proposed. In the front end, design is made by using an unscented Kalman filter modified based on the consensus algorithm. And in the back end, design is made using a covariance intersection algorithm combined with a fast covariance intersection weighting method and an additive fusion method for non additive parameters. Numerical simulation is done with the help of STK and MATLAB, and the validness of the proposed method is demonstrated.

Key words: Distributed satellite, Cooperative navigation, Consensus algorithm, Unscented Kalman filter, Data fusion

CLC Number: