摘要
导线电磁参数的随机特性是多导体传输线串扰预测的重要因素。采用有限元与概率统计相结合的方法,利用Ansys有限元软件建立了多导体传输线的数值计算模型,针对传输线横截面的结构特点,对仿真计算模型进行了简化处理,进一步优化单位长度电磁参数矩阵的提取方法,并通过算例验证所述方法的有效性和可行性。依据概率统计原理,采用分段卷积的方法得出电磁参数概率分布,提出并验证了以三阈值为收敛判据的概率分布算法。通过算例和实验对比,基于三阈值概率分布的电磁参数预测方法简单易行、通用性强,其表征的电磁参数的特点规律准确性高,可作为线缆束串扰预测的有效手段。
The random characteristics of wire electromagnetic parameters are key factors to predict the crosstalk of multiconductor transmission lines(MTL).Combining finite element method(FEM)with probability statistical method,this paper establishes a numerical calculation model of MTL by Ansys software.According to the structure characteristics of cross section of transmission lines,the simulation model is simplified and the extraction method of electromagnetic parameter matrix of per-unit length is optimized.The effectiveness and feasibility are both verified by cases.Based on the principle of probability statistics,the probability distribution of electromagnetic parameters can be obtained by piecewise convolution method.Besides,a probability distribution algorithm taking three thresholds as the converge condition is proposed and verified.Compared the theoretical results with experimental ones,the proposed prediction method possesses the following advantages:simple and easy to operate,good versatility and high accuracy.It is shown the proposed method is an effective method to predict the crosstalk of MTL.
作者
赵亮
王世山
娄千层
张昭
颜伟
Zhao Liang;Wang Shishan;Lou Qianceng;Zhang Zhao;Yan Wei(Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Unit 94654 of PLA,Nanjing 210023,China;School of Electrical and Automation Engineering,Nanjing Normal University,Nanjing 210097,China)
出处
《电工技术学报》
EI
CSCD
北大核心
2018年第8期1663-1673,共11页
Transactions of China Electrotechnical Society
基金
航空科学基金(20142552023)
江苏省自然基金(BK20161019)
南京航空航天大学研究生创新实验基地(实验室)开放基金(kfjj20160310)
中央高校基本科研业务费专项资金资助项目
关键词
多导体传输线
寄生参数
概率分布
有限元法
Multiconductor transmission lines
parasitic parameters
probability distribution
finite element method(FEM)
