| With the rapid development of China’s high-speed rail,CHINA STANDRAD EMU has gradually become the main mode.Faced with this new model,both the commissioning technician and the train driver urgently need a simulation device to learn the basic principles and driving process of the EMU.Since the previous domestic EMU simulation devices are based on other models,and have the defects of slow replacement and backward technology,the simulation device designed in this paper is based on the real car structure of CHINA STANDRAD EMU,which can solve the above problems well.This article first analyzes the network control structure of CHINA STANDRAD EMU and the two-level bus layer of WTB and MVB.According to the characteristics of real car network structure and bus protocol,it analyzes and compares commonly used industrial transmission protocols,and selects the communication method suitable for this system And established the network topology of the EMU simulation device.According to the specific data volume and project requirements,the hardware used in the network architecture and human-machine interface of the simulation device was selected,including the PLC,switch,and MCGS Kunlun display screen of the MAC310 model of DCCE,and the use of supporting equipment Software for programming and interface design.Before programming,first allocate storage areas and IP addresses according to the number of systems that need to transfer data,and then sort,classify,and define the data transmitted by the entire system.The program part realizes the two-way data transmission,logical judgment,status monitoring and other functions of the CCU central control unit.Through the MCGS embedded version configuration software,design the status interface,help interface,maintenance interface,etc.required by each system,write corresponding script programs according to the properties of each interface,and establish different types of operating strategies.The test is divided into two parts.The first part runs and monitors the PLC program and MCGS interface,and performs the communication test on the selected protocol.The second part tests the specific control function of the subsystem by building a laboratory test device.After many debugging,it can be concluded that this design has completed the rapid transmission of data on the basis of meeting various technical indicators,which can effectively avoid the impact of erroneous data on the transmission rate.Compared with the traditional driver display unit,the design interface of this article allows trainees to further monitor the status of each part of the train in real time,and the overall design has a high practical application value. |
