Systems Engineering and Electronics ›› 2021, Vol. 43 ›› Issue (2): 519-525.doi: 10.12305/j.issn.1001-506X.2021.02.26

• Guidance, Navigation and Control • Previous Articles     Next Articles

Influence and countermeasures of radar seeker pointing error on missile guidance

Zhizhong LIAO(), Qi WANG()   

  1. China Airborne Missile Academy, Luoyang 471009, China
  • Received:2020-03-29 Online:2021-02-01 Published:2021-03-16

Abstract:

Due to the joint influence of the pointing error of phased array antenna and the boresight error of radome, the pointing error of phased array radar seeker is serious. When the pointing error slope exceeds a certain range, the problem of parasitic loop oscillation will occur in the missile guidance system, which affects the stability and guidance accuracy of the system, especially at high altitude. In this paper, by constructing the guidance system model of phased array radar seeker, the influence of seeker pointing error slope on missile guidance and the mechanism of parasitic loop oscillation are analyzed. In order to eliminate the adverse effect of seeker pointing error slope on guidance, a multi-model extended Kalman filter estimation method is proposed on the basis of pointing error measurement compensation, which estimate and compensate the pointing error slope in real time. The simulation results show that the proposed method can effectively improve the adverse effect of the seeker pointing error slope on the guidance system, and improve the system stability and guidance accuracy.

Key words: phased array radar seeker, pointing error slope, guidance system stability, multi-model extended Kalman filter (EKF)

CLC Number: 

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