An Overspeed Protection Mechanism for Virtual Coupling in Railway

As a new technology to improve transportation capacity by compressing train tracking interval, virtual coupling (VC) has attracted significant attention from both industry and academia. The traditional overspeed protection mechanism cannot guarantee the safe running for a train fleet. Therefore, in...

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Main Authors: Jing Xun, Mingliang Chen, Yafei Liu, Fan Liu
Format: Article
Language:English
Published: IEEE 2020-01-01
Series:IEEE Access
Subjects:
Online Access:https://ieeexplore.ieee.org/document/9214832/
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spelling doaj-a892fa436d4d4bceb1f4aa3cda2cfb092021-03-30T03:46:39ZengIEEEIEEE Access2169-35362020-01-01818740018741010.1109/ACCESS.2020.30291479214832An Overspeed Protection Mechanism for Virtual Coupling in RailwayJing Xun0https://orcid.org/0000-0003-1656-4719Mingliang Chen1https://orcid.org/0000-0002-8613-7010Yafei Liu2Fan Liu3State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing, ChinaState Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing, ChinaState Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing, ChinaState Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing, ChinaAs a new technology to improve transportation capacity by compressing train tracking interval, virtual coupling (VC) has attracted significant attention from both industry and academia. The traditional overspeed protection mechanism cannot guarantee the safe running for a train fleet. Therefore, in this article, we study two key problems of the overspeed protection mechanism: the limit speed calculation and the safe control for the protection of train in the formation when overspeed occurs. This article describes the calculation methods of limit speed difference (LSD) based on relative coordinates and a collision mitigation approach by minimizing the relative kinetic energy, respectively. Finally, the effectiveness of the proposed method is verified through numerical analysis. The proposed calculation method of limit speed can realize large headway at low speed and small headway at high speed, which can meet the time requirement of switch and route arrangement in station areas. The performance of the model predictive control (MPC) based approach is compared with other two control strategies, i.e. basic adaptive cruise control (ACC) and directly maximum braking control (DBC). The simulation results show that the MPC strategy has the best performance among these three strategies in reducing the total relative kinetic energy of virtually-coupled train formation, followed by the DBC control strategy, and the basic ACC control strategy needs to be improved.https://ieeexplore.ieee.org/document/9214832/High-speed railwayvirtual couplingmodel predictive controllimit speed differencecollision mitigation
collection DOAJ
language English
format Article
sources DOAJ
author Jing Xun
Mingliang Chen
Yafei Liu
Fan Liu
spellingShingle Jing Xun
Mingliang Chen
Yafei Liu
Fan Liu
An Overspeed Protection Mechanism for Virtual Coupling in Railway
IEEE Access
High-speed railway
virtual coupling
model predictive control
limit speed difference
collision mitigation
author_facet Jing Xun
Mingliang Chen
Yafei Liu
Fan Liu
author_sort Jing Xun
title An Overspeed Protection Mechanism for Virtual Coupling in Railway
title_short An Overspeed Protection Mechanism for Virtual Coupling in Railway
title_full An Overspeed Protection Mechanism for Virtual Coupling in Railway
title_fullStr An Overspeed Protection Mechanism for Virtual Coupling in Railway
title_full_unstemmed An Overspeed Protection Mechanism for Virtual Coupling in Railway
title_sort overspeed protection mechanism for virtual coupling in railway
publisher IEEE
series IEEE Access
issn 2169-3536
publishDate 2020-01-01
description As a new technology to improve transportation capacity by compressing train tracking interval, virtual coupling (VC) has attracted significant attention from both industry and academia. The traditional overspeed protection mechanism cannot guarantee the safe running for a train fleet. Therefore, in this article, we study two key problems of the overspeed protection mechanism: the limit speed calculation and the safe control for the protection of train in the formation when overspeed occurs. This article describes the calculation methods of limit speed difference (LSD) based on relative coordinates and a collision mitigation approach by minimizing the relative kinetic energy, respectively. Finally, the effectiveness of the proposed method is verified through numerical analysis. The proposed calculation method of limit speed can realize large headway at low speed and small headway at high speed, which can meet the time requirement of switch and route arrangement in station areas. The performance of the model predictive control (MPC) based approach is compared with other two control strategies, i.e. basic adaptive cruise control (ACC) and directly maximum braking control (DBC). The simulation results show that the MPC strategy has the best performance among these three strategies in reducing the total relative kinetic energy of virtually-coupled train formation, followed by the DBC control strategy, and the basic ACC control strategy needs to be improved.
topic High-speed railway
virtual coupling
model predictive control
limit speed difference
collision mitigation
url https://ieeexplore.ieee.org/document/9214832/
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