基于RCM的混沌腔体电磁耦合特性的研究

发布时间：2018-08-29 14:20

【摘要】：随着电子技术的发展,电子系统和电磁环境变得越来越复杂,各种电磁干扰耦合到目标系统中的不确定性、随机性以及敏感性也越加明显。而电磁耦合效应的统计性描述显然优于确定性描述。随机耦合模型(RCM)在电磁兼容、统计电磁学、抗辐射加固和高功率微波效应研究领域有着重要的意义,为了让其成为具有通用性的研究工具,需进行更深入的理论分析和实验研究。本文针对高功率微波效应(HPM)和电磁兼容(EMC)研究中的典型问题,即复杂封装腔体的电磁耦合,引入并采用随机耦合模型对波混沌腔体的耦合特性进行了系统分析,从理论和实验两个方面对该模型展开研究。首先基于HPM研究现状,分析了现有研究方法的特点以及局限性,着重从复杂腔体的不确定性和效应过程的随机性出发,引入了随机耦合模型并对波混沌现象进行描述和分析。在此基础上,针对复杂腔体内的目标点,进行耦合特性的测试、物理量的提取以及感应电压的统计预测。选取一个调频发射电路作为待测电路,利用Emscan电磁干扰扫描系统确定了待测电路中的敏感区域和敏感点。搭建实验平台,确定实验方法,归纳出一套实验数据处理流程,通过测试得到的腔体的散射系数和辐射散射,计算得出腔体的损耗因子。结合归一化阻抗的求解过程,推导出目标点处感应电压的公式,对感应电压的统计分布进行了分析研究,为高功率微波效应和电磁兼容研究开拓新的方法和思路。
[Abstract]:With the development of electronic technology, the electronic system and electromagnetic environment become more and more complex, and the uncertainties, randomness and sensitivity of various electromagnetic interference coupled to the target system become more and more obvious. The statistical description of the electromagnetic coupling effect is obviously superior to the deterministic description. Stochastic coupling model (RCM) is of great significance in the fields of electromagnetic compatibility, statistical electromagnetics, anti-radiation reinforcement and high-power microwave effect, in order to make it a universal research tool. More in-depth theoretical analysis and experimental research are needed. Aiming at the typical problems in the study of (HPM) and EMC (EMC), that is, electromagnetic coupling of a complex encapsulated cavity, a stochastic coupling model is introduced and the coupling characteristics of the chaotic cavity are analyzed systematically in this paper. The model is studied theoretically and experimentally. Firstly, based on the research status of HPM, the characteristics and limitations of the existing methods are analyzed. Based on the uncertainty of complex cavities and the randomness of the effect process, a stochastic coupling model is introduced and the chaotic phenomena of waves are described and analyzed. On this basis, the coupling characteristics, the extraction of physical quantities and the statistical prediction of inductive voltage are carried out for the target points of complex cavity. An FM transmission circuit is selected as the circuit to be tested. The sensitive area and the sensitive point in the circuit are determined by using the Emscan electromagnetic interference scanning system. A set of experimental data processing flow is concluded. The scattering coefficient and radiation scattering of cavity are measured and the loss factor of cavity is calculated. Combined with the solution process of normalized impedance, the formula of inductive voltage at target point is deduced, and the statistical distribution of inductive voltage is analyzed, which opens up a new method and train of thought for the study of high power microwave effect and electromagnetic compatibility.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN03

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