雷达导引头指向误差对导弹制导的影响与对策

doi:10.12305/j.issn.1001-506X.2021.02.26

摘要/Abstract

摘要：

受相控阵天线指向误差和天线罩瞄准误差的共同影响,相控阵雷达导引头存在较严重的指向误差。当指向误差斜率超出一定范围时会造成导弹制导系统出现寄生回路振荡问题,影响系统的稳定性和制导精度,在高空尤为明显。对此，本文通过构建相控阵雷达导引头制导系统模型,分析了导引头指向误差斜率对导弹制导的影响以及产生寄生回路振荡的机理;为消除导引头指向误差斜率对制导的不利影响,在指向误差测量补偿的基础上,又给出了一种多模型扩展卡尔曼滤波的估计方法,对导引头指向误差斜率进行实时估计与补偿。数字仿真结果表明，所提方法能够有效改善导引头指向误差斜率对制导系统的不利影响,提高系统稳定性和制导精度。

关键词: 相控阵雷达导引头, 指向误差斜率, 制导系统稳定性, 多模型扩展卡尔曼滤波

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)

中图分类号:

TJ765.3

廖志忠, 王琪. 雷达导引头指向误差对导弹制导的影响与对策[J]. 系统工程与电子技术, 2021, 43(2): 519-525.

Zhizhong LIAO, Qi WANG. Influence and countermeasures of radar seeker pointing error on missile guidance[J]. Systems Engineering and Electronics, 2021, 43(2): 519-525.

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参数	取值
V_o/(m/s)	1 350
V_m/(m/s)	900
N	4.0
T₁/s	0.1
T_N/s	0.2
ω_a/(rad/s)	20
ζ	0.7
R	0.02/0.04/0.06
K_R	1.0
K_g	1.0
T_α/s	2.0

参数T_α/s	指向误差测试补偿/m	多模型估计与补偿/m
2.0	8.56	0.56
3.0	11.96	0.58