title: Online Condition Monitoring of a Rail Fastening System on High-Speed Railways Based on Wavelet Packet Analysis.
abstract: The rail fastening system is an important part of a high-speed railway track. It is always critical to the operational safety and comfort of railway vehicles. Therefore, the condition detection of the rail fastening system, looseness or absence, is an important task in railway maintenance. However, the vision-based method cannot identify the severity of rail fastener looseness. In this paper, the condition of rail fastening system is monitored based on an automatic and remote-sensing measurement system. Meanwhile, wavelet packet analysis is used to analyze the acceleration signals, based on which two damage indices are developed to locate the damage position and evaluate the severity of rail fasteners looseness, respectively. To verify the effectiveness of the proposed method, an experiment is performed on a high-speed railway experimental platform. The experimental results show that the proposed method is effective to assess the condition of the rail fastening system. The monitoring system significantly reduces the inspection time and increases the efficiency of maintenance management.
authors.affiliation: Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education, Dalian University of Technology, Dalian 116024, China. jh_wei@mail.dlut.edu.cn.
authors.forename: Jiahong
authors.initials: J
authors.lastname: Wei
authors.affiliation: Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education, Dalian University of Technology, Dalian 116024, China. liuhaixia0930@163.com.|Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology, Dalian 116024, China. liuhaixia0930@163.com.
authors.forename: Chong
authors.initials: C
authors.lastname: Liu
authors.affiliation: Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education, Dalian University of Technology, Dalian 116024, China. ren_tq@dlut.edu.cn.
authors.forename: Tongqun
authors.initials: T
authors.lastname: Ren
authors.affiliation: Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology, Dalian 116024, China. liuhaixia0930@163.com.
authors.forename: Haixia
authors.initials: H
authors.lastname: Liu
authors.affiliation: The 45th Research Institute of CETC, Beijing 100176, China. apr_zhou@163.com.
authors.forename: Wenjing
authors.initials: W
authors.lastname: Zhou
keywords: fasteners looseness; on-line monitoring; rail fastening system; wavelet packet analysis