Browse > Article
http://dx.doi.org/10.7782/JKSR.2012.15.2.122

A Study on the Application of Virtual Track Circuit by Considering Software Fault Tolerance Techniques in Depot  

Lee, Myoung-Chol (유경제어(주))
Ko, Young-Hwan (서울메트로 궤도신호처)
Kim, Min-Seok (한국전기산업진흥회 연구개발팀)
Lee, Jong-Woo (서울과학기술대학교 철도전기신호공학과)
Publication Information
Journal of the Korean Society for Railway / v.15, no.2, 2012 , pp. 122-128 More about this Journal
Abstract
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.
Keywords
Virtual track circuit; Railroad signaling system; Software fault tolerance; Reliability; Availability;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Seoul metro (2009) Installation of Virtual Track Circuit in Depot, pp. 3-5.
2 J.S. Kim (2010) Safety Management for Operation in Depot, Seoul metro, pp. 8-15.
3 Yookyung Control Co. Ltd (2010) Software Algorithm for Virtual Track Circuit, pp. 1-3.
4 J.W. Lee (1999) Signal Control System Engineering Research & Development, Proceedings of the Korean Institute of Electrical Engineers, pp. 51-57.
5 G.h. Min, J.W. Lee (2008) A Study on a Safety Activity on Safety Critical Related Software in Train Control System, Proceedings of the Korean Society of Automotive Engineers, Annual Conference & Exhibition, 2(1), pp. 1077-1083.
6 J.K. Hwang (2000) Software Design as Simulator in Signal Control System, Proceedings of the Korean Society for Railway, pp. 269-275.
7 S.C. Suh, J.W. Lee (2009) Reliability Analysis for Train Control System by Software Fault Tolerance Techniques, Journal of the Korean Society for Railway, 12(6), pp. 1043-1048.   과학기술학회마을
8 J.B. Dugan, M.R. Lyu (1995) Dependability Modeling for Fault-Tolerant Software and Systems Software Fault Tolerance, Wiley Trends in Software Book Series, Wiley, pp. 109- 138.
9 K.H. Kim, H.O. Welch (1989) Distributed Execution of Recovery Blocks : An Approach for Uniform Treatment of Hardware and Software Faults in Real-Time Applications, IEEE Transactions on Computers, 38(5), pp.625-636.