预追踪法在搭建RCS计算平台中的应用

 介绍综合不同RCS贡献机理的计算平台的搭建方法。针对射线追踪法的计算量是这类RCS计算平台计算效率的瓶颈这一现状，提出仅对多次散射区采用射线追踪计算来减小计算量的方法。给出一种通过粗略的射线追踪来确定多次散射区的方法，并用该方法获得任意目标的散射分布图。对预追踪法在RCS平台的搭建中的应用方式进行探讨，并预测效果。通过具体的计算实例验证预追踪法的效果，并给出几类典型目标的多次散射区比例系数，可供采用预追踪法时参考。计算结果表明，在不改变计算精度的条件下，预追踪法可以将RCS计算平台中射线追踪部分的计算量减少到原来的1/3以下。对散射分布的可能应用做出展望，可以作为后续工作的指导。

Application of Pre-tracing Technology in Building of RCS Calculation Platform

The building of RCS calculation platform which includes many different RCS mechanisms is introduced.Considering that the huge computation of ray tracing is the bottleneck of the efficiency of the RCS calculation platform, a method for reducing the computation of ray tracing is given, which suggestsed the calculation of the coupling scattering areas only.The authors conduct a rough ray tracing before really tracing to identify the coupling scattering areas, and obtain some scattering distribution maps of arbitrary targets using this method.The ways to use the pre-tracing method efficiently in the RCS calculation platform are discussed, and the effects are predicted.The typical effect is improved through some calculation examples, and the coupling scattering area ratio of some typical targets is concluded, which is useful for the application of pre-tracing method.The results show that this pre-tracing method can reduce the computational cost of RT part to less than 1/3 of the original.The possible application of pre-tracing method in other way is mentioned also, which can be the direction of future.