基于概率数据关联的雷达导引头抗速度拖引干扰算法

doi:10.12305/j.issn.1001-506X.2022.02.12

Abstract

Abstract:

Considering the problem that pulse Doppler (PD) radar seeker could not track and guide target precisely in the presence of velocity gate pull-off (VGPO) jamming, an algorithm for countering VGPO based on probability data association (PDA) is proposed. For the angle and Doppler measurements of radar seeker, the sequential extended Kalman filter (SEKF) is used to estimate the target state. According to the strong nonlinear characteristics of Doppler measurement, the pseudo-measurement information is constructed, and the method of using the probability data association algorithm to counter VGPO in the phase of Doppler measurement update is proposed. The derivation process of the algorithm is given and the algorithm is verified by numerical simulation. The simulation results show that the algorithm proposed can track the target stably under multiple VGPO jamming, suppress the influence of VGPO on guidance information estimation effectively, and improve the guidance accuracy of the missile.

Key words: radar seeker, sequential extended Kalman filter (SEKF), probability data association (PDA), multiple velocity gate pull-off (VGPO) jamming, target guidance

CLC Number:

TJ765.3

Qi WANG, Zhizhong LIAO, Fei YAN. Algorithm for countering velocity gate pull-off jamming of radar seeker based on probability data association[J]. Systems Engineering and Electronics, 2022, 44(2): 448-454.

Figures/Tables 12

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符号	定义	数值
V_T	目标速度/(m/s)	300
V_M	导弹速度/(m/s)	600
D₀	导弹目标相对距离/m	10 000
θ_M	导弹偏航角/(°)	15
θ_T	目标偏航角/(°)	160

符号	定义	数值
σ_A	角度测量噪声/mrad	1
σ_{V_R}	径向速度测量噪声/(m/s)	0.1
λ	杂波空间密度	0.000 1
P_D	目标检测概率	0.9
P_G	正确回波概率	0.99

符号	定义	数值
T_{J, 1}	第1重干扰的周期/s	5.0
V_{J, 1}	第1重干扰的范围/(m/s)	50
T_{J, 2}	第2重干扰的周期/s	8.0
V_{J, 2}	第2重干扰的范围/(m/s)	-100
T_{J, 3}	第3重干扰的周期/s	12.0
V_{J, 3}	第3重干扰的范围/(m/s)	100

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Algorithm for countering velocity gate pull-off jamming of radar seeker based on probability data association

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