Research And Simulation On Zone Controller Of The CBTC System For Urabn Rail Transit

Accompany with the progress of computer technology, wireless communication technology and control technology, Communication Based Train Control(CBTC) has become the trend of urban railway traffic control system, and it is replacing the original train control system stage by stage. CBTC system is independent of railway circuit and realizes train tracing running according to moving block principle, so that the train can run safely at shorter intervals, applying high resolution train location determination and high capacity, bi-directional train to wayside data communications. Moving block technology represents the developing trend of block technology, CBTC-Moving Autoblock System(MAS) is high step of Communication Based Train Control system. Zone Controller(ZC) is the most important part of ground system for CBTC-MAS, which makes the on board equipment control the train safely by calculating and sending Movement Authority(MA). Therefore, simulation research on ZC is significant.The technological research on the ZC system abroad is mature, while the domestic counterpart is still at the start stage. This paper takes urban rail transit CBTC system as the research background, the function and status of Zone Controller in the CBTC system is analyzed. The principle of moving block is described comparing with semi-moving block, the train following interval model is proposed, this paper also has proved that moving block can decrease the headway and increase the carrying capacity by matlab simulation and proposes the advantages of CBTC-MAS.ZC, as the most important part of ground system for CBTC, has the major functions of train management, generation of Movement Authority and ZC handover. This paper analyzes these functions, presents the design proposal of ZC simulation system, compiles ZC function simulation software and realizes the main functions of the train registration, train logout, generation of Movement Authority and ZC handover. At the same time, it designs the software of VOBC and CI subsystem simulation, the communication platform with VOBC and CI subsystem is constructed.According to principle and function of the ZC system, the function simulation system of ZC system is designed. ZC system is designed and implemented with Visual C++ 6.0, based on the Object-Oriented programming, ZC simulation system is completed in the Windows platform; Interior database of ZC is designed and implemented with SQL Server 2000, including static database and dynamic database. The software framework of system design is modular design, good expandability and easy maintenance. ZC operation simulation system is composed of ZC simulation system, VOBC simulation system, interlocking simulation system with Local Area Networks(LAN).In ZC operation simulation platform, user can simulate not only single train operation but also two train operation controlled by ZC.At last, it summarizes the works of this paper and points out the direction of more studies.