角闪烁对地空导弹末制导影响仿真研究

Simulation Research on the Effects of Angular Glint on the Terminal Guidance of Surface-to-air Missile

角闪烁是地空导弹导引头末制导的主要误差来源。针对其受到天线方向图、目标局部照射等因素影响的问题,提出了一种基于模块化思想计算地空导弹末制导角闪烁实时仿真的方法,建立了弹目交会模型,通过矩阵变换计算出弹目相对位置与雷达视线角的关系,对目标角闪烁进行了实时仿真,结果表明角闪烁线偏差与导弹脱靶量和目标照亮区有直接关系,脱靶量越小,线偏差相对越大,且弹目距离较近时,由于照亮区的不同线偏差将出现较大起伏。

Angular glint was the main error source of the terminal guidance of surface-to-air missile seeker. In view of the problem that it was affected by directional diagram, target local illumination and so on, a method for real-time simulation of angular glint of surface-to-air missile terminal guidance based on modular idea was put forward, and the model of missile target intersection was established. The relation between the relative position of missile target and the aspect angle of radar was calculated by matrix transformation, and the angular glint of target was simulated in real time. The results showed that the line deviation of angular glint was related directly to miss distance of missile and target illuminated area. The smaller the miss distance was, the greater the line deviation was. On condition that missile was approac- hing target, line deviation would appear larger fluctuation due to the difference between light areas.