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http://dx.doi.org/10.5762/KAIS.2016.17.11.1

Train interval control and train-centric distributed interlocking algorithm for autonomous train driving control system  

Oh, Sehchan (Signalling & Communication Research Team, Korea Railroad Research Institute)
Kim, Kyunghee (Signalling & Communication Research Team, Korea Railroad Research Institute)
Choi, Hyeonyeong (Signalling & Communication Research Team, Korea Railroad Research Institute)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.17, no.11, 2016 , pp. 1-9 More about this Journal
Abstract
Train control systems have changed from wayside electricity-centric to onboard communications-centric. The latest train control system, the CBTC system, has high efficiency for interval control based on two-way radio communications between the onboard and wayside systems. However, since the wayside system is the center of control, the number of input trains to allow a wayside system is limited, and due to the cyclic-path control flows between onboard and wayside systems, headway improvement is limited. In this paper, we propose a train interval-control and train-centric distributed interlocking algorithm for an autonomous train-driving control system. Because an autonomous train-driving control system performs interval and branch control onboard, both tracks and switches are shared resources as well as semaphore elements. The proposed autonomous train-driving control performs train interval control via direct communication between trains or between trains and track-side apparatus, instead of relying on control commands from ground control systems. The proposed interlocking algorithm newly defines the semaphore scheme using a unique key for the shared resource, and a switch that is not accessed at the same time by the interlocking system within each train. The simulated results show the proposed autonomous train-driving control system improves interval control performance, and safe train control is possible with a simplified interlocking algorithm by comparing the proposed train-centric distributed interlocking algorithm and various types of interlock logic performed in existing interlocking systems.
Keywords
Train-centric; Autonomous train driving control; Improved interval control; Distributed interlocking; Shared resource; Semaphore;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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