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http://dx.doi.org/10.5762/KAIS.2021.22.6.591

Study on a New Method for Precise Stop Control of Metro Trains: In Case of Large Speed Error  

Kim, Jungtai (Smart Electrical and Signaling Division, Korea Railroad Research Institute)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.22, no.6, 2021 , pp. 591-598 More about this Journal
Abstract
One of the requirements of metro trains is to stop with precision to ensure that the train can stop precisely at the designated location on the platform. If this is not satisfied, interference with the screen door occurs, causing inconvenience to passengers and delays in operation. In the case of an automatic operated train, the current position is determined by the current speed information of the train, and control is performed by issuing an acceleration/deceleration command. Therefore, accurate control becomes impossible if the error of the speed information is large. In metro railroads, a Precision Stop Marker (PSM) is used to correct the position error, so that the error of stop control can be reduced by correcting the position error at a specific point. On the other hand, because the PSM itself has only position information, it does not compensate for the speed error. This paper proposes a method for performing in-place stop control by estimating the speed with the PSM progress information. The speed can be estimated when the train is operated at a constant deceleration speed, and the target deceleration can be obtained to perform stop control. The feasibility and excellence of the proposed method are shown through a numerical simulation.
Keywords
Automatic Train Operator; Precise Stop Control; Precision Stop Marker; Simulation; Stop Error;
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