新型雷达导引头中增加距离通道,既可以优化制导律设计,同时也起到抗干扰功能。为了提高弹目距离测量信息精度,文中首先建立视线方向上的导弹目标相对运动模型,然后结合目标基本保持匀速运动的特点,采用aß滤波器对雷达导引头距离通道中弹目距离进行估计,并通过仿真试验适当调整滤波系数以优化滤波器性能。仿真试验结果表明,aß滤波器对雷达导引头距离估计是有效可行的,且计算量小,易于工程实现。

Range channel is added in New-Type radar seeker, not only optimizing guidance laws, but also playing an effective role in antidisturbance. In order to improve the precision of distance measurement between missile and target, this paper firstly establishes the model of missile-target relative motion based on line-of-sight, then adopts af filter in distance estimation for radar seeker, according to the feature that target basically keeps moving with constant velocity. In order to optimize performance of the filter, the filter coefficients are appropriately adjusted by simulation experiments. The experimental results demonstrate that af filter has good effect in distance estimation for radar seeker, with small computational complexity and it is easy to be realized.