基于有限元插值方法的电磁覆盖范围重建

摘要

In electronic warefare simulation,interpolation is often used to reconstruct electronic wave coverage area with a small amount of electromagnetic data.According to the difficulty to determine scaling factor in Gauss function finite element interpolation algorithm,a method was proposed,which utilizes origine scatter data to estimate the scaling factor.Then,adaptive scaling factor grid was built by region division to reduce triangulation operations.Analysis results show that,the interpolation algrithm with adaptive scaling factor has higher precision than that with fixed scaling factor,and has similar efficiency as linear interpolation algorithm based on triangulation,also obtains satisfactory results when used in electromagnetic coverage area construction.%在电子对抗中,对电磁覆盖识别的研究,需要在已有少量电磁数据情况下利用插值方法对电磁场覆盖范围进行重建.在研究高斯函数有限元插值算法的基础上,针对伸缩因子难以确定问题,提出利用原始数据估算伸缩因子的方法,对区域划分方法建立自适应伸缩因子网格,以减少估算过程中的三角剖分操作和计算耗时.仿真分析结果显示,在自适应伸缩因子情形下的算法比固定伸缩因子情形下具有更高的精度,且与采用三角剖分的线性插值算法具有相近的计算效率,应用于电磁覆盖范围重建时取得了较好的效果.