基于矩阵嵌套稀疏的高强度辐射场飞机内部电磁兼容分析方法研究

项目名称： 基于矩阵嵌套稀疏的高强度辐射场飞机内部电磁兼容分析方法研究

项目编号： No.61501237

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 李猛猛

作者单位： 南京理工大学

项目金额： 19万元

中文摘要： 高强度辐射场(High Intensity Radiated Field, HIRF)是飞机飞行中经常遇到的环境，也是影响现代航空安全的重要因素，因此急需对HIRF环境下飞机内部电磁兼容特性进行系统研究。飞机内部的电磁分析属于电磁场近场问题，相比远场，近场的变化更加剧烈，计算精度要求更高。项目围绕HIRF环境飞机内部电磁兼容分析，面向真实飞机电磁兼容分析存在的复合材料、宽频带、多尺度等特点及难点，从计算方法精确性、效率、鲁棒性三个方面进行创新性研究：研究多分辨基函数改善低频计算精度；研究矩阵嵌套稀疏方法及其预条件、旋转对称等效面区域分解、并行技术提高计算效率；研究高低频、区域个数、进程个数的控制参数，根据实际问题自适应选择计算参数，提高方法的鲁棒性。项目相关的理论研究及高效算法对HIRF环境下飞机的设计、验证、更新、维护等整个寿命周期具有重要的指导意义。

中文关键词： 高强度辐射场；电磁兼容；多尺度；电磁分析；积分方程

英文摘要： The normal electromagnetic (EM) environments—high intensity radiated fields (HIRF) are usually met during a regular flight service. This is also the main reason affecting the safe modern flights. Therefore, it is much important to analysis the electromagnetic compatibility within the real aircraft structure in HIRF environment. The EM analysis within the aircraft is the near field problems, compared with the far field, it changes much more drastic, which requires high computation precision. The project focuses on the electromagnetic compatibility analysis within the aircraft in HIRF environment. To solve the properties and difficulties of complex media, wideband, and multiscale during the electromagnetic compatibility analysis, we start novel research methods on computation accuracy, efficiency, and robustness: the multiresolution basis functions are proposed to improve the computation precision at low frequency; the nested sparse matrix fast method and preconditioner, domain decomposition method with body of revolution equivalent surface, and parallel techniques are proposed to enhance the computation efficiency; the factor to control the low/high frequency region, number of subdomains, and number of threads are researched in detail to get an automatic simulation solver with best efficiency to enhance the computation robustness. The theory and efficient methods of the project is of important constructive meaning for the aircraft design, validation, revolution, and maintenances during the whole life.

英文关键词： High Intensity Radiated Field;Electromagnetic Compatibility;Multiscale;Electromagnetic Analysis;Integral Equation