基于SNR的烟幕干扰效果仿真

摘要

烟幕对红外等电磁波具有吸收、反射和散射特性,可导致导引头上接收的能量大大衰减,从而降低导弹的命中概率.针对外场烟幕性能测试受气象条件和环境因素的影响较大,对准确评估抗红外烟幕遮蔽性能存在较大困难的情况,结合气象条件从烟幕透过率的变化引起导引头信噪比变化的角度,建立了烟幕干扰效果的评估模型,通过计算机仿真,得出了烟幕对红外制导导弹的干扰效果.通过试验对其中的一些结论进行了实验验证,结果表明计算结果能够与实验数据较好吻合.%With the characteristic of absorbing, reflecting and infracting infrared ray, the smoke screen results in heavily attenuating energy of guidance head, and then reduce the probability of missile shooting. Because the test of external field smoke screen efficiency of is deeply affected by weather and environment and it is difficult to estimate exactly the process of smoke screen against infrared guided missile. The jamming efficiency estimating model of the smoke screen is established from the point of SNR of missile influenced by transmittance of smoke screen. Jamming efficiency of the smoke screen against infrared guided missile is simulated by numerical computation. Some of results are confirmed by experiment and the experiment data are consistent with calculated results.