基于核外求解方法的电大目标散射特性计算  

Scattering calculation of electrically large targets based on out-of-core solving method

作　　者：徐晓飞[1] 曹祥玉[1] 高军[1] 杨群[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077

出　　处：《电波科学学报》2010年第4期679-683,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金(No.60671001);陕西省自然科学基础研究重点项目(No.2020JZ010);陕西省基础研究基金(No.SJ08-ZT06);空军工程大学电讯工程学院博士创新基金(No.200706)

摘　　要：电大尺寸目标的散射特性计算一直是研究的热点。但由于计算机物理内存的限制,使得某些多未知量问题无法解决。基于矩量法,分析了物体散射的计算方法,采用硬盘存储器代替内存储器的核外求解方法很好地解决了上述问题。将矩阵按块依次进行消元,缩短了数据读写时间,加快了求解速度。分别计算了金属立方体与金属导弹模型的双站雷达散射截面。结果表明:该方法可以有效求解电大目标散射问题,不损失计算精度。The computation of electrically large target＇s scattering characteristics is always the focus of the research. But many problems, which have more unknowns, can not be solved due to the limit of the computer＇s physical memory. Based on method of moments（MOM）, the calculation method of scattering from target was analyzed. Out-of-core solving method using hard disk instead of memory can effectively solve the above problem. The matrix was decomposed by blocks, so the reading/writing time of the data can be shortened, thus the solving speed was accelerated. The bistatic radar cross section（RCS） of a metal cube and a metal missile were calculated respectively. The results show that the method, which is proposed in this paper, can efficiently solve the problems of scattering form electrically large targets, and the calculation precision is kept.

关 键 词：核外求解 矩量法 雷达散射截面 

分 类 号：TN011[电子电信—物理电子学]