为了实现对下落段速度大、螺旋机动的弹道导弹的有效拦截,反导导弹必须有针对性的进行制导滤波技术的研究。文中创新性的采用拉普拉斯变换方法进行4态滤波设计,对目标加速度、加速度一阶导、加速度二阶导同时进行在线估计,滤波结果与3态滤波结果比具有延迟小、精度高的特点;同时结合已有Weave制导律,通过和3态滤波+比例导引、3态滤波+最优导引进行对比,得出4态滤波+Weave导引具有脱靶量小的优点。

For effective interception of ballistic missiles with large velocity and screw maneuverability in their falling course, focused research should be carried out on guidance filter techniques. In this paper, a novel Laplace transform was used to design a four-state filter and the target acceleration, first and second derivatives of acceleration were estimated. The results are more accurate with short latency compared with three-state filter estimation. Meantime, combined with the given Weave guidance law, the four-state filter with weave guidance law is proved to have advantages in smaller miss distance compared with the three-state filter with proportional guidance law and three-state filter with optimal guidance law.