Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on the Estimation and Verification of the Availability of the Unmanned Light Railway

무인 경량전철 가용도 산정 및 검증에 관한 연구

  • Kwon, Sang Don (Department of Rolling Stock System, Seoul National University of Science & Technology) ;
  • Song, Bo Young (Ministry of Land Infrastructure and Transport) ;
  • Lee, Hi Sung (Department of Rolling Stock System, Seoul National University of Science & Technology)
  • 권상돈 (서울과학기술대학교 철도차량시스템공학과) ;
  • 송보영 (국토교통부 철도운행안전과) ;
  • 이희성 (서울과학기술대학교 철도차량시스템공학과)
  • Received : 2018.11.15
  • Accepted : 2019.02.14
  • Published : 2019.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

Unattended Train operation(UTO) requires higher safety target than other systems, since all train operations are automatic. The system provider to deliver without accident or failure, and the operator to transport passengers without accident by putting all trains supplied, including them, into service. Safety rates without such failures can be represented as indicators of RAMS, among which availability is continuously controllable to achieve the target, with a clear target. Availability is often required by the licensee from the initial stage of the project to demonstrate that the request for proposal (RFP) is usually specified and to maintain separate availability targets at the operational stage. In particular, unlike unmanned operation light rail in complex systems, simple formulas are often presented to facilitate verification at each stage. This paper presents this method of usability calculation in an integrated manner at all levels and analyzes the existing usability values to ensure reliability of the availability formula for integrated use in unmanned light rail systems.

Keywords

HOJHB0_2019_v34n1_108_f0001.png 이미지

Fig. 1. General availability calculation.

HOJHB0_2019_v34n1_108_f0002.png 이미지

Fig. 2. Suggestions for system availability calculations.

HOJHB0_2019_v34n1_108_f0003.png 이미지

Fig. 3. Overview of shuttle tain routes.

HOJHB0_2019_v34n1_108_f0004.png 이미지

Fig. 4. Normal operation mode of shuttle train.

HOJHB0_2019_v34n1_108_f0005.png 이미지

Fig. 5. Proposal of MTBF and availability by 3rd shuttle train.

HOJHB0_2019_v34n1_108_f0006.png 이미지

Fig. 6. 120-Days cumulative availability on operational routes.

Table 1. Application examples of availability by route

HOJHB0_2019_v34n1_108_t0001.png 이미지

Table 2. Application examples of availability by route

HOJHB0_2019_v34n1_108_t0002.png 이미지

Table 3. Quantitative availability requirements

HOJHB0_2019_v34n1_108_t0003.png 이미지

Table 4. Availability target value (construction company)

HOJHB0_2019_v34n1_108_t0004.png 이미지

Table 5. Comparison of availability against train failures(1)

HOJHB0_2019_v34n1_108_t0005.png 이미지

Table 6. Comparison of availability against train failures(2)

HOJHB0_2019_v34n1_108_t0006.png 이미지

References

  1. IEC 62267-2:2011, Railway Applications Automated Urban Guided Transport (AUGT) Safety Requirements - Part 2 : Hazard Analysis at Top System Level, International Electro Technical Commission
  2. KS C IEC 62278:2002, Railway Applications Specification and Demonstration of Reliability, Availability, Maintainability and Safety (RAMS), International Electro Technical Commission
  3. J. G. Hwang, H. J. Jo, C. H. Han, W. S.k, Cho and J. Ahn, "Development and Application of Safety Activity Process for Railway Signaling Systems", J. Korean Soc. Saf., Vol. 25, No. 1, 2010.
  4. I. S. Chung, J. W. Kim and K. W. Lee, "The Study on the Demonstration Test of Quantitative Reliability Requirements for Rolling Stocks", Journal of the Korean Society for Railway, Vol. 11, No. 3 pp. 233-239, 2008.
  5. M. C. Lee, "A Study on Reliability & Availability of Train Detection using Virtual Track Circuit", Department of Railroad Electrical & Signalling Engineering, Graduate School of Railroad, Seoul National University of Science and Technology, 2012.
  6. M. G. Park and S. H. Han, "A Study on the Risk based RAMS Assessment for Railway Rolling Stock Systems", The Transactions of the Korean Institute of Electrical Engineers, Vol. 64P, No. 4, pp. 220-230, 2015.
  7. Y. H. Cho, H. W. Lee, J. W. Kim and J. M. Yang, "A Study on Reliability Indicator Analysis and Management Method of Railway Vehicle Component", Journal of Korean Society for Urban Railway, Vol. 6, No. 1, pp. 27- 36, 2018. https://doi.org/10.24284/JKOSUR.2018.03.6.1.27
  8. H. S. Yun, K. S. Lee, S. K. Ryou and D. I. Yang, "A Study on the RAMS Analysis of Urban Maglev Train Control System", Journal of Korean Society for Railway Vol. 14, No. 6, pp. 515-525, 2011. https://doi.org/10.7782/JKSR.2011.14.6.515
  9. I. S. Chung, K. W. Lee and J. W. Kim, "A Study on RAMS Parameters in the Procurement Requirement for Rolling Stock", Journal of Korean Society for Railway, Vol. 11, No. 4, pp. 371-377, 2008.
  10. C. S. Kim and H. S. Lee, "Reliability Analysis of Electric Door System for EMU", J. Korean Soc. Saf., Vol. 28, No. 8, pp. 52-56, 2013. https://doi.org/10.14346/JKOSOS.2013.28.1.052
  11. K. J. Kim and K. O. Lee, "A Study on the Improcement for EMU Maintenance System of Urbal Transit", J Korean Soc. Saf., Vol. 25, No. 1, pp. 87-92, 2010.