DOI QR코드

DOI QR Code

검수고에서 소프트웨어 결함허용기법을 고려한 가상궤도회로의 적용에 대한 연구

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

  • 이명철 (유경제어(주)) ;
  • 고영환 (서울메트로 궤도신호처) ;
  • 김민석 (한국전기산업진흥회 연구개발팀) ;
  • 이종우 (서울과학기술대학교 철도전기신호공학과)
  • 투고 : 2011.11.10
  • 심사 : 2012.02.17
  • 발행 : 2012.04.30

초록

차량기지 검수고에 구조를 고려하였을 시, 철제빔으로 인해 열차를 검지하기 위한 궤도회로를 설치하기가 어렵고, 레일과 대지가 철제빔으로 연결되어 누설전류가 많아지므로 궤도회로 시스템을 적용할 수 없다. 그러므로 열차가 검수고에 들어오면 수작업으로 차량이 있다는 표시를 하여 사용하고 있으며, 잘못 취급할 시에는 열차충돌 혹은 탈선으로 이어지는 사고가 발생할 수 있다. 본 논문에서는 검수고에서 소프트웨어 프로그램을 이용하여 가상궤도회로를 적용하였다. 가상궤도회로의 알고리즘을 제시하였으며, 열차가 점유된 검수고 방향으로 신호를 취급하는 경우에 검수고 열차점유 표시 및 신호기 정지신호 표시로 인해 검수고에서 열차의 안전성을 확보하였다. 또한 프로그램의 신뢰도 및 가용도를 분석하여 소프트웨어에 적합한 결함허용 기법을 적용하였다.

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.

키워드

참고문헌

  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.
  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.

피인용 문헌

  1. A Train Locating Device Using the Current Phase Difference Upon Magnetic Field Variation vol.15, pp.6, 2012, https://doi.org/10.7782/JKSR.2012.15.6.604