Design And Implementation Of CBTC Wayside&Vehicle Equipments Simulation System Based On B/S Architecture

With the implementation of the strategy of "transportation power" and the rapid economic development in China,the Communication Based Train Control(CBTC)system has basically replaced the train control system based on track circuit or active transponder,and has become the main system of Automatic Train Control(ATC)of urban rail transit.In this background,this paper designs and implements CBTC equipment simulation system based on B/S architecture.This system can be applied in ATS indoor test,CBTC training system and other occasions,and has the advantages of easier maintenance,easier remote access,better crossplatform performance and so on,which has certain advantages and application prospects.This paper first describes the necessity of the CBTC wayside and vehicle-onboard equipment simulation,as well as the advantages of the B/S technical routes;Secondly,the structure and function of CBTC wayside and on-board equipment are introduced respectively,and the differences between CBTC,China Railway Signal System and Point ATC System are explained.On this basis,this paper designed the overall architecture of CBTC equipment simulation system based on MVC architecture,and detailly analyzed the functional requirements of the wayside control equipment such as basic equipment control,route control and movement authority calculation,as well as the key functional requirements of on-board controller such as safety braking model building and train operation data simulation.Based on the above discussion on the structure and functional requirements of CBTC system,this paper designs the static and dynamic data structures of the system on the basis of directed graphs.On the basis of requirement analysis and data structure design,this paper uses B/S architecture,Java language and JSP server page,realizes the simulation of the CBTC equipment key functions,designs the initialization method of the data,including static data stored in XML documents,the dynamic data stored in the MySQL database,and scalable vector graphics(SVG)based graphical client pages;Based on the directed graph data structure,the path search algorithm of CBTC yards is designed.The key functions of the CBTC wayside and on-board equipment are designed and realized,including approach control,movement authorization generation,train control,etc.Finally,the format of ATS control command is designed and the parsing of control command is realized.To sum up,this paper analyzes the key functions of wayside and vehicle-onboard equipment in CBTC system,and designs the static data model and dynamic data model of CBTC yards.On this basis,the CBTC wayside and vehicle-onboard equipment simulation software based on B/S architecture is designed and implemented,which realizes the above key functions and can graphically display the current state of equipment in the form of station map and simulated MMI,which meets the functional requirements of CBTC equipment simulation system and has availability and practicability.