摘要
多层快速多极子法是基于矩量法的快速算法,具有较低的计算复杂度和存储复杂度,被广泛应用于目标电磁散射特性分析。对于复杂结构电磁目标,由于矩阵条件数较差,往往存在迭代收敛慢甚至不收敛的问题。针对这一情况,文中利用快速多极子的近区矩阵,结合稀疏矩阵方程求解构造了一种高效预条件。数值实例表明该方法相比于块对角预条件效果更好,能有效加速多层快速多极子迭代过程。
Based on the method of moment(MoM),the multilevel fast multipole algorithm(MLFMA)has the property of low computation and storage complexity,and it is widely used in calculating electromagnetic scattering problems.However,for a target with complex structure,there will be an ill-conditioned matrix,making the iteration time too long or the problem non-convergence.Considering such situation,we propose a kind of preconditioner combining the near-field matrix and sparse matrix solver for MLFMA.Compared with the block diagonal preconditioned methods,this method has better convergence characteristic.
作者
罗建刚
梅吴杰
左胜
赵勋旺
张玉
LUO Jian-gang;MEI Wu-jie;ZUO Sheng;ZHAO Xun-wang;ZHANG Yu(Shaanxi Key Laboratory of Large Scale Electromagnetic Computing,Xidian University of China,Xi'an 710071,China)
出处
《微波学报》
CSCD
北大核心
2019年第2期22-25,共4页
Journal of Microwaves
基金
国家重点研发计划(2017YFB0202102和2016YFE0121600)
中国博士后科学基金资助项目(2017M613068)
关键词
矩量法
多层快速多极子算法
电磁散射
预条件
method of moments
multilevel fast multipole algorithm
electromagnetic scattering
precondition
