为了估算红外探测系统对巡航导弹的作用距离,首先构建了巡航导弹的简化模型,分析了各主要红外辐射源在3～5μm和8～12μm两个波段上的红外辐射特征;然后指出了既有的基于表观对比度作用距离模型的不足,针对此不足推导了适用性更广泛的作用距离方程,并给出了逐步逼近法求解该方程;最后通过算例求出结果并进行了分析.%To estimate the operating range of an infrared (IR) detection system to cruise missiles, a simplified model of cruise missile was built up. The radiation characteristics of each main source of IR radiation at wavebands of 3 ～ 5 μm and 8 ～ 12 μm and were analyzed. The insufficiencies of the existing model of operating range based on apparent contrast were pointed out, on which basis a modified operating range function was given. Then a step-by-step approximation method was presented for obtaining the feasible solution to the function. The computation result was analyzed at last.
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