摘要
针对飞行器表面存在的多列缺陷目标,基于电磁场叠加理论,提出并推导了用于分析多列电磁缺陷目标的散射相干原理,并以此为基础,建立了多列缺陷目标散射机理的研究方法;提出了间距电尺寸的概念,系列雷达散射截面实验表明,散射相干原理可用来精确分析不同类型多列缺陷目标的散射机理,间距电尺寸决定散射分布的形式,对多列缺陷目标散射有重要影响,而不同的缺陷类型主要影响散射幅值大小;从相干原理出发,结合精确数值算法,提出了多列缺陷目标的快速预估方法,具有与多层快速多极子算法一致的精度,且几乎不占用计算内存和时间。
For the multi-column discontinuities existing on the aircraft surface, based on the superposition theory of the electromagnetic field, the principle of scattering coherence for the analysis of the multi-column electromagnetic discontinuities is proposed and deduced. Based on this principle, the research method for the mechanism of the multi-column discontinuities scattering is established; and the concept of the spacing electrical size is proposed. Series of radar cross section experiment indicate that, the scattering coherent principle could be used to accurately analyze the scattering mechanism of different types of multi-column discontinuities, and the spacing electrical size determines the distribution form of the scattering, which has important influence on the multi-column discontinuities’ scattering, while the different types of discontinuities mainly affect the size of scattering amplitude; and based on the coherent principle, and combined with the accurate numerical algorithm, the fast prediction method for multi-column discontinuities is proposed, whose accuracy is consistent with the multilevel fast multipole algorithm. Besides, this algorithm almost does not take up the computing memory and time.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2017年第11期2428-2433,共6页
Systems Engineering and Electronics
基金
国家重点基础研究计划(973计划)(61320)
河南省科技攻关计划(172102210530)
河南省高等学校重点科研项目计划(17B590002)
航空科学基金(2015ZD55005)资助课题
关键词
电磁缺陷
雷达散射截面
散射
飞行器
隐身
electromagnetic discontinuities
radar cross section
scattering
aircraft
stealth
