Modeling And Implementation Of On-board Subsystem Of Train Control System Based On T2T Communication

With the rapid development of rail transportation industry,a lot of researchers at home and abroad are carrying out the new generation of train control system in order to optimize structures and upgrade functions of traditional train control systems.Train control system based on T2T communication is a typical representative of the new generation of train control system for urban rail transit.It is based on train-to-train communication and it optimizes the system structure,reduces the number of trackside equipment and the total life cycle cost,and improves the reliability of the system through redistribution of train control functions.The train control system based on T2T communication consists of ground subsystem and on-board subsystem.This paper focuses on three core functions of on-board subsystem:T2T communication module,movement authority calculation module and speed protection module.The specific works are as follows:(1)The basic principle of train control system based on T2T communication and function requirements of on-board subsystem are analyzed,especially the information interactions among various functional modules after T2T communication module and movement authority calculation module are added to the on-board subsystem.(2)The formal models of on-board subsystem of train control system based on T2T communication are established and validated using Colored Petri Net theory and CPN Tools.The models include the communication model between one train and TMU,the T2T communication model among trains,the movement authority calculation model and the speed protection model.These models prove that the basic principle of on-board subsystem of train control system based on T2T communication is correct.(3)The T2T communication module,movement authority calculation module and speed protection module of on-board subsystem of train control system based on T2T communication are implemented using Visual Studio 2017 and C language programming.(4)The functional tests of on-board subsystem are done on simulation and test platform of train control system based on T2T communication.One train moving within a section scenario,two trains tracing within a section scenario and train reentrying scenario are verified.