主动雷达抗拖曳式诱饵干扰的角度提取方法

Acquiring Method of Angle for Active Radar against TRAD

通过对拖曳式有源雷达诱饵干扰的分析,得到了平衡状态下对导引头测角值进行数据积累并且取均值后,导引头将指向大功率辐射源的结论。在诱饵信号从功率上压制载机回波信号的前提下,对导引头处于平衡状态时的测量角公式进行数学推导。结果表明:可由导引头处理时间内任意两次测角值及其对应的和支路振幅比求得载机、诱饵和导弹三者形成的夹角的角平分线方向,从而间接求得小功率辐射源(载机)的角度。最后,结合比例导引规律,通过飞行弹道仿真验证了雷达型空空导弹应用上述方法可以获得准确的目标角度,进而导引导弹准确命中目标。

In this paper, the method for active radar seekers to acquire target angle under TRAD is studied. By means of jamming analysis and mathematical deducing, it is concluded that in equilibrium state, the typical value of the metrical angles sum is the angle value of the more powerful radiant point. Further, the formula of metrical angle in equilibrium state is deduced in another form in case that the decoying signal is more powerful than the echo. The results show that the angular bisector between the decoy and the target could be acquired using two discretional metrical angles and corresponding amplitude ratio of sum super tracks. And then the angle of target could be acquired indirectly. The above method is proved to be reliable and effective by terminal guidance trajectory simulation result.