Systems Engineering and Electronics ›› 2021, Vol. 43 ›› Issue (12): 3658-3666.doi: 10.12305/j.issn.1001-506X.2021.12.29

• Guidance, Navigation and Control • Previous Articles     Next Articles

Improved adaptive IMM algorithm for space maneuvering target tracking

Juqi YIN, Zhen YANG*, Yazhong LUO, Jianyong ZHOU   

  1. College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • Received:2021-01-05 Online:2021-11-24 Published:2021-11-30
  • Contact: Zhen YANG

Abstract:

Aiming at the singularity of real-time model transition probability correction using model likelihood function comparison with traditional interacting multiple model (IMM) algorithm, an improved adaptive IMM algorithm is proposed based on the proposed correction function. Firstly, combining the white noise model with the extended Kalman filter(EKF) algorithm, the non maneuvering model EKF1 and maneuvering model EKF2 are designed as the model set of IMM algorithm. Secondly, the prediction model adopts the nonlinear relative orbit dynamic equation suitable for the elliptical reference orbit to improve the prediction accuracy of the model. Finally, the effect of rate measurement information on reducing the peak error of maneuvering target tracking is analyzed. The simulation results show that the tracking accuracy of the improved model transition probability adaptive imm-ekf algorithm is significantly improved and better than the existing methods. After introducing the rate measurement information, the maximum peak error and estimation accuracy are improved.

Key words: maneuvering target tracking, orbital mechanics, interacting multiple model (IMM), space situational awareness, orbital maneuver

CLC Number: 

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