Research On Key Technologies Of CBTC System Based On Radio Communication

As the advance of wireless communication technology,the modern urban rail transit operation control technology has been gradually formed on the basis of the communication technology of automatic train operation control technology,wireless communication has become a modern train automatic control CBTC system car preferred way of information transmission.CBTC research began in the 1960s.Until the end of last century,the IEEE first clear the definition of CBTC and establish a set of standards officialy.The study of high efficiency CBTC control system is important to improve urban rail transportation capacity,shorten spacing of driving and reduce operating costs.Based on the key technology of train CBTC system of wireless communication,this paper focuses on the analysis and research of the automatic control system of urban rail transit vehicle.The main contents are as follows:(1)This paper comprehensively expounds the development process of CBTC system at home and abroad,and deeply studies the composition,main function,subsystem interface and logical architecture of CBTC system.(2)Based on the basic CBTC logic structure,a point-based train control model based on fixed occlusion and a continuous train control model based on mobile occlusion are established.The train control model based on mobile occlusion is mainly studied.(3)The train control system of the continuous train is simulated and the train tracking,positioning and overspeed protection model between the interval and the platform are established.The tracking interval is analyzed by MATLAB software.(4)This paper studies the composition and function of CBTC key subsystem ATS system,and puts forward the hardware and software architecture of wireless communication subsystem(RCS),and analyzes the redundant design of ATS system.