基于代理模型的舰船进气格栅雷达隐身优化

RCS optimization of naval air-intake grille based on surrogate model

为解决目标雷达波隐身优化计算过程中资源消耗大的问题,利用代理模型模拟电磁散射特性计算的过程,降低电磁散射计算所需要的次数,优化电磁散射计算效率。针对某典型舰船进气格栅的设计方案,利用Kriging代理模型方法模拟其RCS(radar cross section)随几何变量的变化关系,并利用自适应遗传算法对代理模型的计算消耗进行优化。经优化计算,获得了进气格栅在典型雷达波参数下最优隐身方案,与初始方案相比RCS均值降低了约42%,通过计算结果验证了通过利用Kriging代理模型具备提高舰船设备RCS优化效率的可行性。

In order to solve the problem of large consumption of target radar wave stealth optimization calculation,surrogate model was used to reduce the calculation of electromagnetic scattering characteristics by reducing the number of calculations for electromagnetic scattering and improving the efficiency of optimization calculation.For a typical ship intake grille scheme,the change relationship between RCS(radar cross section)and geometric variables was simulated by Kriging surrogate model,and the surrogate model was optimized by adaptive genetic algorithm.The optimal stealth scheme of the intake grille under typical radar wave parameters was obtained,and the RCS mean value was reduced by 42%compared with the initial scheme.The feasibility of using the Kriging agent model to improve the optimization efficiency of ship equipment RCS is verified.