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Detection of incipient faults in EMU braking system based on data domain description and variable control limit

机译:基于数据域描述和变量控制极限的动车组制动系统早期故障检测

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摘要

The performance of braking system strongly affects the safe operation of electric multiple unit (EMU). During the practical operation, it's of great significance to detect incipient faults in braking system. Since the braking process is a typical non-Gaussian and multi-stage process, it's difficult to detect these incipient faults. Particularly, the usually occurred overlap of normal and faulty samples during braking process makes the detection more difficult. In this paper, a novel method based on data domain description and variable control limit (VCL) is developed for detecting incipient faults in EMU braking system. The local reachability density (LRD) weighted support vector data description with negative samples (NSVDD) is introduced for offline modeling to get more accurate domain description, while the Gaussian kernel trick is utilized to obtain hypersphere with soft boundary. With the presence of sample overlap, the VCL strategy is adopted for online fault detection, which effectively reduces false alarm rate (FAR) and increases fault detection rate (FDR) simultaneously. A case study of three kinds of incipient faults in EMU braking system fully demonstrates the effectiveness of the proposed method. (C) 2019 Elsevier B.V. All rights reserved.
机译:制动系统的性能严重影响电动多单元(EMU)的安全运行。在实际操作中,检测制动系统的早期故障具有重要意义。由于制动过程是典型的非高斯多级过程,因此很难检测到这些早期故障。特别是,在制动过程中正常样品和有缺陷样品的通常发生的重叠使得检测更加困难。本文提出了一种基于数据域描述和变量控制极限(VCL)的新方法,用于检测动车组制动系统中的早期故障。引入带有负样本的本地可达性密度(LRD)加权支持向量数据描述(NSVDD)进行离线建模,以获取更准确的域描述,而高斯核技巧则用于获得具有软边界的超球面。当存在样本重叠时,采用VCL策略进行在线故障检测,可以有效降低误报率(FAR),同时提高故障检测率(FDR)。以动车组制动系统的三种初期故障为例,充分证明了该方法的有效性。 (C)2019 Elsevier B.V.保留所有权利。

著录项

  • 来源
    《Neurocomputing》 |2020年第28期|348-358|共11页
  • 作者

  • 作者单位

    Tsinghua Univ Dept Automat Beijing 100084 Peoples R China;

    Tsinghua Univ Dept Automat Beijing 100084 Peoples R China|Shandong Univ Sci & Technol Coll Elect Engn & Automat Qingdao 266590 Shandong Peoples R China;

    Tsinghua Univ Dept Automat Beijing 100084 Peoples R China|Linyi Univ Sch Automat & Elect Engn Linyi 276005 Shandong Peoples R China;

    CRRC Qingdao Sifang Rolling Stock Res Inst Co Ltd Qingdao 266112 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Incipient fault; Electric multiple unit (EMU); Braking system; Local reachability density (LRD); Variable control limit;

    机译:初期故障;电动多单元(EMU);制动系统本地可达密度(LRD);可变控制极限;
  • 入库时间 2022-08-18 05:21:22

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