针对导弹在拦截超低空目标时面临的多路径效应问题,当擦地角在布儒斯特角附近时,地海杂波反射系数最小,制导精度较高。文中通过建立超低空拦截弹道模型,研究出一种满足布儒斯特角约束的制导律,设计出一种导弹拦截目标的总体弹道方案,并进行弹道优化,分析了不同参数对导弹弹道特性的影响。仿真结果表明,所设计出的弹道较为平直,并且满足要求,从弹道设计角度探索出了一种降低多径干扰的途径。

According to the multipath effect problem that the missile intercepts super-low-altitude target, when the grazing angle near Brewster Angle, the reflection coefficient of clutter reach the minimum, the precision of guidance is higher. A super-low-altitude intercept trajectory model is established in the article. Then an improved proportional guidance law satisfying the Brewster Angle constraint is developed, the overall trajectory of the missile from launch to strike target finally is designed. Based on this, the trajectory optimization is carried out to analyze the influence of different parameters on ballistic characteristics of the missile.The Simulation show that the trajectory designed is relatively straight and meet the requirements. From the perspective of trajectory design, a way to solve the problem of reducing multipath interference have been explored.