针对影响干扰效果的因素——干扰机功率、假目标设置距离、干扰激光超前量, 推导了所需干扰功率的表达式,通过建立真、假目标和导引头之间的位置关系模型, 讨论了假目标的设置距离与导引头高度、导引头光轴高低角和方位角的关系, 得出一般应用条件下, 假目标的设置距离。分析并得到了干扰信号与制导信号的概率密度函数, 给出针对不同波门宽度的时间超前量的最优值, 得出减小干扰信号的时间稳定性可使干扰信号进入波门概率增加的结论。

Jamming power, the interval of artificial target and the setforward time are the key factors affecting the jamming result. In this paper, the expression of jamming power was deduced, the model of position relationship between real and artificial targets and the missile was established. The relationship of the interval of artificial target with the height of missile seeker and the altitude and azimuthal angle of the optical axis was discussed. Then the interval of artificial target was obtained. Based on analyzing the probability density function of jamming signal and guided signal, the best value of setforward time along with different gate width was found. It can be concluded that decreasing the time stability of jamming signal can increase the probability of jamming pulse into the gate.