• Title/Summary/Keyword: Fault Train

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A Study on ground fault at low voltage line and apparatus in urban railway station (도시철도역사의 저압선로 및 기기에서의 지락사고 방지 방안에 관한 검토)

  • Min Kyung-Yun;Kim Jin-Ho;Han Hag-Su
    • Proceedings of the KSR Conference
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    • 2005.11a
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    • pp.699-704
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    • 2005
  • In the station of the railway and the subway various illumination equipment and a general power equipment for a passenger convenience, the signal equipment and the communication equipment which is necessary to the train operation provided. At the all of like this equipment from the electric room which is established in each station by changing from high voltage to low voltage and it supplies from the illumination transformer, the power transformer and the signal transformer. If it supplies to the equipment from the high voltage to the low voltage, it must be established to contact protection device in between the high voltage coil and the low voltage coil. Also it must do the grounding faulting device at the low voltage lines, the earthing devices at apparatus for the protection of an electric shock and an electric fire by the electric relation law. Compared the related regulations between the facilities which require protective functions such as grounding fault or earthing in public utilities like subway stations, and the facilities which do not require line earthing or protective functions such as electricity supplied for signalling the train. Also, will describe a countermeasure for the accident from a grounding fault.

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A Study on the Application of Virtual Track Circuit by Considering Software Fault Tolerance Techniques in Depot (검수고에서 소프트웨어 결함허용기법을 고려한 가상궤도회로의 적용에 대한 연구)

  • Lee, Myoung-Chol;Ko, Young-Hwan;Kim, Min-Seok;Lee, Jong-Woo
    • Journal of the Korean Society for Railway
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    • v.15 no.2
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    • pp.122-128
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    • 2012
  • Considering structure of depot, it is impossible to install the track circuit systems due to iron-beam. Because rails and earth are connected by the iron-beam, there is much leakage current. So, it is hard to apply the track circuit systems. Thus, when trains go to the depot, sign which indicates existence of trains is used manually. In case of wrong sign, accidents occur such as train crash, derailment etc. Currently, location of trains has been found by using optical sensor in the depot to prevent the accidents. However, it costs a great deal to install and maintain the optical sensor. Therefore, this method is hardly used in train operation institutes. In this paper, virtual track circuit systems are introduced by using software program in the depot. Also, algorithm of the virtual track circuit systems is proposed. In case that signal is handled to the depot which is occupied by the train, safety is ensured by indicating sign which means existence of trains and stop signal. Also, proper fault tolerance techniques are proposed to the software by analyzing reliability and availability.

A Study on the Method of Data Sharing and Voting for TMR Processing (TMR 처리를 위한 데이터의 공유 및 보팅 방법에 관한 연구)

  • Um, Jung-Kyou;Yang, Chan-Seok
    • Proceedings of the KSR Conference
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    • 2011.10a
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    • pp.2804-2807
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    • 2011
  • As computer-based train control system became used widely, reliability and safety assessment of the computer is getting more important. A fault on a computer can cause a malfunction of train control system, and this can lead an accident. So where reliability and safety is highly required TMR is used. In this paper, the method of data sharing and voting for TMR processing is proposed, designed and verified.

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Reliability assesment of tilting train using Fault Diagnosis analysis device (고장진단분석장치를 이용한 틸팅열차 신뢰성 평가 연구)

  • Han, Seong-Ho
    • Proceedings of the KIEE Conference
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    • 2009.07a
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    • pp.1203_1204
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    • 2009
  • Korean Tilting trains have tested on conventional lines since the beginning of 2007 for evaluating its reliability. We achieved some major performance tests which are the maximum operation speed 180km/h test and the maximum curves increasing speed with tilting operation test. In order to analysis reliability data of tilting train, we have used the special data aquisition system which consists of monitor, sensors and depot computer etc. As a results of calculation, until now we realized that the reliability are getting more increasing than starting point of running test.

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Development of the Risk Assessment Model for Train Collision and Derailment (열차 충돌/탈선사고 위험도 평가모델 개발)

  • Choi, Don-Bum;Wang, Jong-Bae;Kwak, Sang-Log;Park, Chan-Woo;Kim, Min-Su
    • Proceedings of the KSR Conference
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    • 2008.06a
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    • pp.1518-1523
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    • 2008
  • Train collision and derailment are types of accident with low probability of occurrence, but they could lead to disastrous consequences including loss of lives and properties. The development of the risk assessment model has been called upon to predict and assess the risk for a long time. Nevertheless, the risk assessment model is recently introduced to the railway system in Korea. The classification of the hazardous events and causes is the commencement of the risk assessment model. In previous researches related to the classification, the hazardous events and causes were classified by centering the results. That classification was simple, but might not show the root cause of the hazardous events. This study has classified the train collision and derailment based on the relevant hazardous event including faults of the train related the accidents, and investigates the causes related to the hazardous events. For the risk assessment model, FTA (fault tree analysis) and ETA (event tree analysis) methods are introduced to assess the risk.

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The Study about TCMS Wireless Depot Analytical Equipment Development and Test Results at SeoulMetro Line2 (서울2호선 TCMS 무선지상장치 개발 및 시험결과에 대한 고찰)

  • Kim, Do-Hoon;Seo, Sang-Jun;Han, Jeong-Soo;Kim, Chul-Ho
    • Proceedings of the KSR Conference
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    • 2008.06a
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    • pp.353-362
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    • 2008
  • Operation data and fault data are recorded at the TCMS(Train Control and Monitoring System) of train are very important record for repairs and inspection of train. there are two ways to transfer the data today. one is using memory card and the other is using wireless communications. This paper is proposed about TCMS wireless depot analytical equipment that transfers data recorded in train to depot equipment via wireless method. The TCMS wireless depot equipment configuration is an AP(Access Point) and a central server PC at depot equipment. This method has the advantage of decrease of personnel expenses, collection time and convenience of staffs. This paper is verified about the utility of use, efficient establishment position of an AP at depot, the safety of data receiving, the exactitude of data and the shortening of transmission time. and this equipment is now operating at shin-jeong depot of SeoulMetro.

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A Study of Dynamic Behavior in Braking States of Tilting Train (틸팅 차량의 곡선 주로 주행 시 감속에 따른 동적 특성 연구)

  • Lee, J.H.;Park, T.W.;Kim, Y.K.;Kim, S.W.;Hwang, C.H.
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2005.11a
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    • pp.151-154
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    • 2005
  • Tilting train improves a traveling velocity through giving a tilt the car-body without ride comfort deterioration In curve. Dynamic behavior in deceleration will show quite another feature in constant velocity, In this study, we see through the dynamic behavior due to a variation of braking force in Korean Tilting Train. Hence we compose of 3D dynamic model, as well as we check upon the property in service braking condition and unique braking condition with a fault system. This study has the meaning with reference data of developing Korean Tilting Train test traveling.

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A Study On Verification Methodology On Railway Signalling System related to Fail Safe/ Fault Tolerant (철도신호의 Fail Safe/Fault Tolerant 시스템에 대한 검증방법에 대한 연구)

  • Lee, Jong-Woo;Joung, Eui-Jin;Hwang, Jong-Gyu;Shin, Duck-Ho
    • Proceedings of the KIEE Conference
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    • 2002.07b
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    • pp.1214-1219
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    • 2002
  • Railway signalling system always is required high safety and reliability. The failure of the train control system can provoke a serious accident. In this paper, we show how to achieve the safety and reliability by dividing signalling system into vital and non functions, studying operational environment.

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A study on the implementation of the fault-tolerant digital filter using self-checking pulse rate residue arithmetic circuits. (자기검사(自己檢査) 펄스열(列) 잉여수연산회로(剩餘數演算回路)를 이용한 폴트 토러런트 디지탈 필타의 구성(構成)에 관한 연구(硏究))

  • Kim, Moon-Soo;Chun, Koo-Chae
    • Proceedings of the KIEE Conference
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    • 1987.07b
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    • pp.1185-1187
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    • 1987
  • Digital systems are increasingly being used in the ranges of many control engineering. The residue number system offers the possibility of high speed operation and error correction. The compact self-checking pulse-train residue arithmetic circuit is proposed. A fault tolerant digital filter is practically implemented using these proposed circuits.

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A Model for Machine Fault Diagnosis based on Mutual Exclusion Theory and Out-of-Distribution Detection

  • Cui, Peng;Luo, Xuan;Liu, Jing
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.16 no.9
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    • pp.2927-2941
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    • 2022
  • The primary task of machine fault diagnosis is to judge whether the current state is normal or damaged, so it is a typical binary classification problem with mutual exclusion. Mutually exclusive events and out-of-domain detection have one thing in common: there are two types of data and no intersection. We proposed a fusion model method to improve the accuracy of machine fault diagnosis, which is based on the mutual exclusivity of events and the commonality of out-of-distribution detection, and finally generalized to all binary classification problems. It is reported that the performance of a convolutional neural network (CNN) will decrease as the recognition type increases, so the variational auto-encoder (VAE) is used as the primary model. Two VAE models are used to train the machine's normal and fault sound data. Two reconstruction probabilities will be obtained during the test. The smaller value is transformed into a correction value of another value according to the mutually exclusive characteristics. Finally, the classification result is obtained according to the fusion algorithm. Filtering normal data features from fault data features is proposed, which shields the interference and makes the fault features more prominent. We confirm that good performance improvements have been achieved in the machine fault detection data set, and the results are better than most mainstream models.