多导体线束内串扰概率分布的预测

发布时间：2018-03-15 01:36

本文选题：串扰　切入点：电缆线束　出处：《电工技术学报》2017年07期 　论文类型：期刊论文

【摘要】：串扰是电气、电子系统内部多导体传输线间的相互电磁干扰,受其影响系统可靠性往往较差。电缆线束作为典型的多导体传输线,其串扰问题显得尤为突出。针对电缆线束内导线位置的不确定性,提出一种线束内串扰概率分布的预测方法,在假定线束横截面固定的条件下,将线束分为N段,计算单一子段的电磁参数分布律,并利用卷积算法求得整个线束的电磁参数概率分布;基于蒙特卡洛法,结合多导线传输线理论得到线束串扰的概率分布,进而帮助设计者发现系统内潜在的串扰问题、评估遭受串扰影响的系统可靠性。为了得到卷积算法中分段数N的合适取值,以线束的扭绞程度为依据,提出了相应的经验公式,并结合实际算例进行测量。实验结果表明,线束的分段数N应与线束的扭绞程度相适应;线束的扭绞程度越高,线束内串扰的概率分布越集中,有趋于"平均化"的规律。
[Abstract]:Crosstalk is the mutual electromagnetic interference between multi-conductor transmission lines in electrical and electronic systems, and the reliability of the system affected by it is often poor. The cable harness is a typical multi-conductor transmission line. The crosstalk problem is especially prominent. In view of the uncertainty of wire position in cable harness, a prediction method of crosstalk probability distribution in cable harness is proposed. Under the assumption that the cross section of wire harness is fixed, the wire harness is divided into N segment. The distribution law of electromagnetic parameters of a single segment is calculated, and the probability distribution of electromagnetic parameters of the whole wire bundle is obtained by convolution algorithm, and the probability distribution of crosstalk is obtained by combining the Monte Carlo method and the theory of multi-conductor transmission line. In order to get the appropriate value of the piecewise number N in the convolution algorithm, based on the twisted degree of the wire harness, a corresponding empirical formula is proposed, which can help the designers to find out the potential crosstalk problem in the system and evaluate the reliability of the system affected by the crosstalk, in order to obtain the appropriate value of the piecewise number N in the convolution algorithm. The experimental results show that the number of segments N of the wire harness should be appropriate to the twisted degree of the wire harness, and the higher the twisted degree of the wire harness, the more concentrated the probability distribution of crosstalk in the wire harness is, which tends to be "average".
【作者单位】：江苏省新能源发电与电能变换重点实验室(南京航空航天大学);江苏省计量科学研究院;
【基金】：国家自然科学基金(51307075) 航空科学基金(20142552023) 江苏省普通高校研究生科研创新计划项目(SJLX15_0109) 中央高校基本科研业务费专项资金资助
【分类号】：TM24;TM15

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