Running position matching for the monitoring bogie and temporal subtraction analysis of derailment coefficient

The derailment coefficient, which is calculated based on the wheel-rail contact forces, indicates the running safety of a railway vehicle with respect to flange climb derailment. The value of the derailment coefficient changes constantly due to numerous factors associated with the vehicle and track...

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Autores principales:	Yosuke ICHIYANAGI, Yohei MICHITSUJI, Akira MATSUMOTO, Yasuhiro SATO, Hiroyuki OHNO, Seigo OGATA, Masuhisa TANIMOTO, Atsushi IWAMOTO, Tomoki FUKUSHIMA, Takuji NAKAI
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2019
Materias:	railway derailment coefficient monitoring track twist temporal subtraction dp matching Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/b6b2f2afc8a84ebe9703cfd2f11168d4
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spelling	oai:doaj.org-article:b6b2f2afc8a84ebe9703cfd2f11168d42021-11-29T05:40:48ZRunning position matching for the monitoring bogie and temporal subtraction analysis of derailment coefficient2187-974510.1299/mej.18-00426https://doaj.org/article/b6b2f2afc8a84ebe9703cfd2f11168d42019-02-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/6/2/6_18-00426/_pdf/-char/enhttps://doaj.org/toc/2187-9745The derailment coefficient, which is calculated based on the wheel-rail contact forces, indicates the running safety of a railway vehicle with respect to flange climb derailment. The value of the derailment coefficient changes constantly due to numerous factors associated with the vehicle and track conditions while the vehicle runs on a service line. Therefore, it is desirable to monitor the state of the wheel/rail contact in order to ensure the running safety. Recently, a new monitoring bogie, which can measure the derailment coefficient during commercial operations, has been developed and introduced into some service lines. Large-scale data have been collected by this monitoring bogie. In this paper, the temporal subtraction analysis is carried out for preparing appropriate plan for reducing the derailment coefficient based on these data. In the analysis, the vehicle running position is important for accurate calculation of the difference between two waveforms. However, the vehicle running position contains errors because of the accumulated error of integral calculation of the vehicle velocity. The present paper proposes a method which modifies the running position along track so that the two waveforms are well matched. The proposed method is based on DP matching, and the waveforms of the track irregularity of twist estimated by the monitoring bogie are used in the method. After DP matching, an example of temporal subtraction analysis of the derailment coefficient between two periods is performed. Finally, by using the long-term measurements acquired by the monitoring bogie, the monthly variation of the derailment coefficient for a certain spot on the track is shown as a practical example.Yosuke ICHIYANAGIYohei MICHITSUJIAkira MATSUMOTOYasuhiro SATOHiroyuki OHNOSeigo OGATAMasuhisa TANIMOTOAtsushi IWAMOTOTomoki FUKUSHIMATakuji NAKAIThe Japan Society of Mechanical Engineersarticlerailwayderailment coefficientmonitoringtrack twisttemporal subtractiondp matchingMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 6, Iss 2, Pp 18-00426-18-00426 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	railway derailment coefficient monitoring track twist temporal subtraction dp matching Mechanical engineering and machinery TJ1-1570
spellingShingle	railway derailment coefficient monitoring track twist temporal subtraction dp matching Mechanical engineering and machinery TJ1-1570 Yosuke ICHIYANAGI Yohei MICHITSUJI Akira MATSUMOTO Yasuhiro SATO Hiroyuki OHNO Seigo OGATA Masuhisa TANIMOTO Atsushi IWAMOTO Tomoki FUKUSHIMA Takuji NAKAI Running position matching for the monitoring bogie and temporal subtraction analysis of derailment coefficient
description	The derailment coefficient, which is calculated based on the wheel-rail contact forces, indicates the running safety of a railway vehicle with respect to flange climb derailment. The value of the derailment coefficient changes constantly due to numerous factors associated with the vehicle and track conditions while the vehicle runs on a service line. Therefore, it is desirable to monitor the state of the wheel/rail contact in order to ensure the running safety. Recently, a new monitoring bogie, which can measure the derailment coefficient during commercial operations, has been developed and introduced into some service lines. Large-scale data have been collected by this monitoring bogie. In this paper, the temporal subtraction analysis is carried out for preparing appropriate plan for reducing the derailment coefficient based on these data. In the analysis, the vehicle running position is important for accurate calculation of the difference between two waveforms. However, the vehicle running position contains errors because of the accumulated error of integral calculation of the vehicle velocity. The present paper proposes a method which modifies the running position along track so that the two waveforms are well matched. The proposed method is based on DP matching, and the waveforms of the track irregularity of twist estimated by the monitoring bogie are used in the method. After DP matching, an example of temporal subtraction analysis of the derailment coefficient between two periods is performed. Finally, by using the long-term measurements acquired by the monitoring bogie, the monthly variation of the derailment coefficient for a certain spot on the track is shown as a practical example.
format	article
author	Yosuke ICHIYANAGI Yohei MICHITSUJI Akira MATSUMOTO Yasuhiro SATO Hiroyuki OHNO Seigo OGATA Masuhisa TANIMOTO Atsushi IWAMOTO Tomoki FUKUSHIMA Takuji NAKAI
author_facet	Yosuke ICHIYANAGI Yohei MICHITSUJI Akira MATSUMOTO Yasuhiro SATO Hiroyuki OHNO Seigo OGATA Masuhisa TANIMOTO Atsushi IWAMOTO Tomoki FUKUSHIMA Takuji NAKAI
author_sort	Yosuke ICHIYANAGI
title	Running position matching for the monitoring bogie and temporal subtraction analysis of derailment coefficient
title_short	Running position matching for the monitoring bogie and temporal subtraction analysis of derailment coefficient
title_full	Running position matching for the monitoring bogie and temporal subtraction analysis of derailment coefficient
title_fullStr	Running position matching for the monitoring bogie and temporal subtraction analysis of derailment coefficient
title_full_unstemmed	Running position matching for the monitoring bogie and temporal subtraction analysis of derailment coefficient
title_sort	running position matching for the monitoring bogie and temporal subtraction analysis of derailment coefficient
publisher	The Japan Society of Mechanical Engineers
publishDate	2019
url	https://doaj.org/article/b6b2f2afc8a84ebe9703cfd2f11168d4
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_version_	1718407668338524160

Running position matching for the monitoring bogie and temporal subtraction analysis of derailment coefficient

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