Research And Implementation Of Software Simulation Of Crh2Train Communication Network

With the rapid development of passenger line and high-speed railway in China, the needs of domestic products of the train equipment become more and more strengthen. As one of key technologies, train communication network is also becoming more and more important in the high-speed train. At present, the train communication and control network used in the high-speed train does not have fully independent intellectual property rights. No mature domestic product is available. Most of train communication network systems are controlled completely by the foreign from products to system integrators, which has considerable impact on the use and maintenance of system. Therefore, the simulation researched on the train communication network system has strongly practical significance. As for the network communication system technology of CRH2train, the studies are mainly concentrated on CRH2EMU model. These model-based studies are abstract and not related to the core technologies of the train network communication system itself, and the construction of system simulation platform for high-speed network communication is still a blank field.On the backgroud of the National Science and Technology Support Project-"high-speed train (CRH2) traction drive and train network system-Network System Simulation", the thesis conductes in-depth study on CRH2TCN (train communication network) simulation. On the basis of analyzing the basic structure and working principle of the CRH2TCN, a detailed study on the core module is made, and the details of core technologies are also analyzed clear. After the above works, the overall program of software simulation of CRH2TCN is designed success with modular software design ideas, functional modules and software architecture are also clear.On the basis of system requirements analysis and software architecture, detailed design and implementation of software simulation of CRH2TCN has been done with characteristics of Ethernet, ARCNET and other related technologies. A software simulation system of CRH2TCN has been developed successfully. The developed simulation system has the function of simulation of packets construction, the creation and maintenance of the logical ring network, the transmition and receivation of data packets based on token of CRH2TCN, as well as simulation-based network performance statisticsFinally, system deployment has been maken with15nodes for the software simulation system in order to give a comparatively factually simulation about CRH2TCN. And then the system has been detailed tested. The test results show that the simulation system developed in the thesis is feasible, meet the requirement of the subject, and can provide a certain reference for the localization of CRH2EMU network communication technology.