混沌扩频多根电缆故障在线同步诊断研究

doi:10.3969/j.issn.0372-2112.2018.07.012

电子学报 ›› 2018, Vol. 46 ›› Issue (7): 1625-1632.DOI: 10.3969/j.issn.0372-2112.2018.07.012

混沌扩频多根电缆故障在线同步诊断研究

毛健美, 王莉, 胡苏阳, 高闯

南京航空航天大学自动化学院, 江苏南京 211100

收稿日期:2017-02-13 修回日期:2017-08-16 出版日期:2018-07-25
- 通讯作者:
- 王莉
- 作者简介:
- 毛健美,女.1991年10月出生,江苏南通人.2014年和2017年于南京航空航天大学获得工学学士和工学硕士学位.主要研究方向为健康管理与故障预测.E-mail:maojianmei@nuaa.edu.cn
- 基金资助:
- 国家自然科学基金 (No.51277093）

Research on Synchronous Online Diagnosis of Multiple Cable Faults Based on Chaotic Spread Spectrum Sequence

MAO Jian-mei, WANG Li, HU Su-yang, GAO Chuang

College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 211100, China

Received:2017-02-13 Revised:2017-08-16 Online:2018-07-25 Published:2018-07-25

摘要/Abstract

摘要： 针对实际飞机电源系统电缆布线复杂，数量多的问题，本文基于现有的单根电缆故障检测成本高、效率低、检测难度大的研究现状，利用混沌序列对初值敏感（初值不同信号干扰小）、序列数量巨大的特点，提出将混沌序列用于飞机多根电缆故障在线同步诊断的方法.解决了扩展频谱时域反射法（Spread Spectrum Time Domain Reflectometry，SSTDR）中采用相同m序列进行同步诊断时相互干扰、易误判问题，m序列数量限制导致的检测数量问题.研究发现其尖锐的自相关特性能够较好应用于单根电缆故障诊断，故障特征明显；其良好的互相关特性能够同时进行多根电缆的故障诊断，抗干扰性好；结合混沌序列数量多的优势，其能够推广应用于复杂电缆故障的在线诊断.实验结果表明混沌扩频电缆故障诊断方法可有效实现多根电缆故障的同步诊断，定位误差在20cm以内，检测率达90%以上.

关键词: 混沌, 序列数量, 多根电缆, SSTDR, 自相关, 互相关

Abstract: In this paper,for the problem that the cables in aircraft power system are complex,numerous and hard to detect,the method based on chaotic spread spectrum sequence for synchronous online diagnosis of complex cable system is proposed.The proposed method can solve the limitation of the cables' number that can be diagnosed synchronously in spread spectrum time domain reflectometry (SSTDR).The model of chaotic spread spectrum sequence is established,and the research shows that its pointed autocorrelation characteristic can be applied in single cable fault diagnosis,and its good cross-correlation characteristic can be applied in multiple cable faults diagnosis.With the large number of chaotic sequence,the proposed method can be extended to online diagnosis of multiple cable faults.The experimental results show that the method of chaotic sequence can effectively realize the synchronous diagnosis of multiple cable faults,with the location error within 20cm and the detection rate above 90%.

Key words: chaotic, number of sequence, multiple cables, SSTDR (spread spectrum time domain reflectometry), autocorrelation, cross-correlation

中图分类号:

TM93

毛健美, 王莉, 胡苏阳, 高闯. 混沌扩频多根电缆故障在线同步诊断研究[J]. 电子学报, 2018, 46(7): 1625-1632.

MAO Jian-mei, WANG Li, HU Su-yang, GAO Chuang. Research on Synchronous Online Diagnosis of Multiple Cable Faults Based on Chaotic Spread Spectrum Sequence[J]. Acta Electronica Sinica, 2018, 46(7): 1625-1632.

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混沌扩频多根电缆故障在线同步诊断研究

Research on Synchronous Online Diagnosis of Multiple Cable Faults Based on Chaotic Spread Spectrum Sequence

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