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。为保证导弹在垂直发射条件下程序转弯结束时的擦地角能够满足要求,设计一种程序转弯方案,通过建立滑模控制模型,并分析控制参数对程序转弯的影响,在此基础上选择最优的控制参数进行了程序转弯弹道仿真,最后得到最优的转弯函数和转弯结束时间。
In view of the multipath effect problem when the missile was intercepting the ultra low altitude target, when the grazing angle near Brewster angle, the reflection coefficient of sea clutter was minimum, and the precision of guidance was relatively high. In order to guarantee the grazing angle meet the requirement after the procedure turn under the condition of missile vertical launching, a procedure turn scheme was designed. By establishing the model of sliding mode control, and analyzing the effects of control parameters on procedure turn, the optimal control parameters were chosen to simulate the program turning trajectory, finally the optimal turning function and turning end time were obtained.
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