DOI QR코드

DOI QR Code

A Study on the Brake Regulation Point to Obey Velocity Limits for Entering Speed Restriction Regions in the Distance to Go System

Distance to Go System에서 속도제한 구간 진입 시 속도준수를 위한 제동제어 시점에 관한연구

  • Kim, Tae-Kyu (KORAIL) ;
  • Lee, Jong-Woo (Dept. of Railway Electrical and Singnalling, Seoul National University of Science and Technolgy)
  • Received : 2015.07.29
  • Accepted : 2015.10.06
  • Published : 2015.10.31

Abstract

Train speed controlling systems are now changing from wayside systems to onboard signaling systems. Locomotive engineers refer to wayside markers to decide on a braking point when the train speed appears to be lower than the current speed. However, in the onboard signaling systems that have been installed recently, the braking point is not determined by the wayside signal but by an onboard value. In this paper, we studied braking points and methods for deciding on such points by engineers using the onboard systems. An optimized braking point is proposed via simulation of decelerating velocity to control the velocity in the signaling system through a predefined point; Gaussian distributions are used to simulate the actual situation. We estimated and demonstrated how to obtain braking parameters in order to satisfy the interval of permitted error.

철도에서 신호 장치는 지상신호 장치에서 차상신호 장치로 전환되고 있다. 기관사들은 현재까지의 지상신호 장치나 과거의 차상신호 장치의 경우 차내 신호에 현재속도보다 낮은 속도가 현시되거나 운행선로의 속도가 낮아질 경우 선로변 표지를 기준으로 제동제어 시점을 결정하였다. 그러나 최근 도입된 차상신호 시스템에서는 선로변 표지를 참고하지 못하고 차상신호 현시 값에 의해, 적정 제동시점을 찾기 어려웠다. 본 논문에서는 최근에 철도에서 사용되어지는 차상신호 시스템에서 기관사들의 제동제어 시점 및 방법을 연구하여 신호 system의 제동제어 감속도를 simulation하여 최적 제동제어 시점을 설정하고 그 점을 중심으로 가우시안 분포(Gaussian Distribution)를 이용하여 제동거리의 오차 범위가 안전거리 내에 있음을 증명하고 평가하였다.

Keywords

References

  1. M.A. Sangkyun (2014) A study on electrical braking control method for energy efficiency improvement in magnetically levitation train, Proceedings of the Fall Conference Korean Society for Raiway, 1(1), pp. 322-327.
  2. C.H. Lee, Chleo (2012) A study on the TPS of unmanned vehicle operation using ATO, Proceeding of The Korean Society for Railway, 15(6), pp. 609-615.
  3. J. Pachl (2002) Railway operation and control, VTD Rail Publishing, 3(1), pp. 26-89.
  4. S.G. Choi (2009) The control of brake system on the electrical vehicle in railroad, Rolling Stock Engineering, no 135, pp 112-132.
  5. Alstom, ATC Functional specification, internal no : 65800T6500 902 Y01.
  6. ERA_ERTMS (2004) Introduction to ETCS braking curves, ERA_ERTMS_040026, 2(1), pp. 8-11.
  7. Korail human resources development institute (2002) Pneumatic braking, Alstom, pp. 111-119.
  8. V.A. Profillidis (2006), Railway management and engineering, ASHGATE, pp. 35.