从飞行器雷达散射截面的计算机仿真出发，对运动飞行器的RCS动态特性和复杂电磁环境下的隐身性能进行研究。基于运动目标姿态参数的转换原理，得到运动目标的动态RCS特性，通过相对计算方法计算雷达的瞬时探测概率，并给出有源和无源干扰条件下探测概率的计算方法；以单部雷达的目标检测准则为基础，给出了雷达组网模式下的综合检测准则；考虑实际地形遮蔽，给出飞行器在突防时的暴露范围和预警时间的计算模型；最后依据预警时间给出RCS的指标需求论证方法。算法可模拟飞行器在真实战场中的动态RCS特性，并提供一种有效的探测概率计算及目标检测判定方法。

The simulation of the Radar Cross Section (RCS) of low-observable aircraft was studied and the dynamic RCS characteristic and the stealth performance of moving aircrafts were analyzed. Firstly, the dynamic RCS characteristic of the moving target was obtained, and the instantaneous detection probability was calculated out through a relative method. The methods for calculating the detection probability under active/passive jamming environment were given and the fused detection probability of radar network was proposed. Then, the models for calculating the exposure region and early-warning time of combat aircraft in penetration were proposed taking terrain shading into consideration. At last, the RCS requirement was proposed according to the exposure probability requirement. The simulation showed that this algorithm is effective in the simulation and calculation of the exposure probability.