|Table of Contents|

Dynamic control of train interval based on real-time calibration of safe headway(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2014年01期
Page:
112-118
Research Field:
交通信息工程及控制
Publishing date:

Info

Title:
Dynamic control of train interval based on real-time calibration of safe headway
Author(s):
PAN Deng;  ZHENG Ying-ping
School of Electronic and Information Engineering, Tongji University, Shanghai 201804, China
Keywords:
train interval control;  safe headway;  train behavior adjustment;  steady-following state;  formal description;  fitting function
PACS:
U260.138
DOI:
-
Abstract:
The relationship between train interval and its following behavior was analyzed. When the steady-following state of high-speed train was broken, the dynamic control of train interval was described by using the formal modeling tool of Petri nets. For the CTCS-4 level train control system, a fitting function of the minimum safe headway changing with the current velocity of following train within the full-range velocity field was constructed by using numerical analysis method, and the constructed fitting function was used for the behavioral quality evaluation of following train. The dynamic control model of train interval was established based on the evaluation of train following behavior, and the model was simulated and verified. Simulation result indicates that during the period of train following system operating from a safe and efficient steady-following state with a velocity of 200 km·h-1 and a train interval of 5 849.18 m to another steady-following state with a velocity of 380 km·h-1, the dynamic control of train interval is accomplished well by the behavioral adjustment of following train, and the train interval is only 358.00 m longer than the safe headway when a new steady-following state is realized at the velocity of 380 km·h-1, which means that a new safe and efficient steady-following state is established. When the preceding train stops abruptly in emergency, under the action of control law, the following train takes a corresponding measure to reduce its own velocity for movement in safety, efficiency and smoothness until it stops completely. The simulation results verify the effectiveness and feasibility of control method for safe and efficient train following operation. 1 tab, 6 figs, 17 refs.

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Last Update: 2014-03-20