{"title":"Improving residual robustness to noise for fault localization in a Y-shaped network","authors":"","doi":"10.1016/j.ifacol.2024.07.243","DOIUrl":null,"url":null,"abstract":"<div><p>This paper aims at detecting soft faults, i.e. degradations, in Y-shaped communication networks and locating the faulty branch. The proposed method is based on the transmission coefficient (TC) between each source and the receivers. The estimation of the TC is performed online by power line communication technology through orthogonal frequency division multiplexing scheme. Then, a health indicator per receiver is computed and sent back to the source, which computes a set of structured residual signals for fault detection and localization. This method is validated by data collected on a laboratory test bench. To enhance the robustness of the residuals to noise, modified residuals are proposed. These new residuals are obtained by weighting the centered residuals by the Frequency Response Assurance Criterion. The experimental results confrm the robustness of the weighted residuals while maintaining their sensitivity to soft faults.</p></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405896324003276/pdf?md5=e1ead6d5c6d3198e0e4432201d10cd18&pid=1-s2.0-S2405896324003276-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IFAC-PapersOnLine","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2405896324003276","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Engineering","Score":null,"Total":0}
引用次数: 0
Abstract
This paper aims at detecting soft faults, i.e. degradations, in Y-shaped communication networks and locating the faulty branch. The proposed method is based on the transmission coefficient (TC) between each source and the receivers. The estimation of the TC is performed online by power line communication technology through orthogonal frequency division multiplexing scheme. Then, a health indicator per receiver is computed and sent back to the source, which computes a set of structured residual signals for fault detection and localization. This method is validated by data collected on a laboratory test bench. To enhance the robustness of the residuals to noise, modified residuals are proposed. These new residuals are obtained by weighting the centered residuals by the Frequency Response Assurance Criterion. The experimental results confrm the robustness of the weighted residuals while maintaining their sensitivity to soft faults.
本文旨在检测 Y 型通信网络中的软故障,即降级,并定位故障分支。所提出的方法基于每个信号源和接收器之间的传输系数(TC)。通过正交频分复用方案,利用电力线通信技术在线估算传输系数。然后,计算每个接收器的健康指标,并将其发送回信号源,信号源计算出一组结构化残余信号,用于故障检测和定位。在实验室测试台上收集的数据对该方法进行了验证。为了增强残差信号对噪声的稳健性,提出了修正残差信号。这些新的残差是通过频率响应保证准则对居中残差进行加权得到的。实验结果证实了加权残差的稳健性,同时保持了对软故障的敏感性。
期刊介绍:
All papers from IFAC meetings are published, in partnership with Elsevier, the IFAC Publisher, in theIFAC-PapersOnLine proceedings series hosted at the ScienceDirect web service. This series includes papers previously published in the IFAC website.The main features of the IFAC-PapersOnLine series are: -Online archive including papers from IFAC Symposia, Congresses, Conferences, and most Workshops. -All papers accepted at the meeting are published in PDF format - searchable and citable. -All papers published on the web site can be cited using the IFAC PapersOnLine ISSN and the individual paper DOI (Digital Object Identifier). The site is Open Access in nature - no charge is made to individuals for reading or downloading. Copyright of all papers belongs to IFAC and must be referenced if derivative journal papers are produced from the conference papers. All papers published in IFAC-PapersOnLine have undergone a peer review selection process according to the IFAC rules.