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摘要：世界各国基于嵌入式计算机控制技术，列车局域网技术以及现场总线技术的快速发展，相继成功研制了各种列车通信网络。1988年，国际电工委员会第九技术会员会的WG22工作组，为铁路设备的数据通信制定了一项标准，即TCN，我国于2002年颁布的铁道部标准中也将其正式确认为列车通信网络标准。TCN(Train Communication Network)由绞线式列车总线(WTB)与多功能车辆总线(MVB)组成。MVB总线的作用是连接车辆内的各个可编程设备，而连接列车的各个车辆的任务则由WTB总线完成。MVB之所以能成为下一代车辆的通讯总线标准，并且适合用做车辆总线的原因是MVB属于快速的过程控制优化的总线。24265
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本文在开始部分用一节的篇幅从TCN的背景资料、发展及应用三个方面介绍了列车通信网的基本情况。随后，为了更好的了解、分析TCN，在第二节对LonWorks、WorldFIP、CAN这些在国内外都较为主流的列车通信网络进行技术上的比较。第三节则对列车通信网的第二级——MVB进行重点研究，重点剖析了MVB通信网络的网络结构、网络数据、介质访问以及网络层次(包括物理层和数据链路层)；另外,进一步阐述了列车总线的接口设备、端口以及网络控制器。第四、第五节内容主要针对仿真部分，其中，第四节为此次仿真搭建的平台——Simulink和Stateflow的使用说明，第五节则具体描述了模型的搭建以及波形分析。
此次仿真在Matlab的环境下完成，用模块化的方法对MVB通信网络进行形式化建模，使MVB通信过程更加明朗，使网络更易理解。不仅总线系统的通信行为通过仿真被动态呈现，仿真模型的搭建也为进一步研究总线控制系统的性能提供了广阔的前景。
毕业论文关键词： 列车通信网络； MVB通信网络；仿真
Research and Design of MVB Communication Network in Railway Vehicles
Abstract：The development for train local area network, fieldbus technology and embedded computer technology is quickly. So many countries have developed all kinds of train communication networks. In 1988, the International Electrician Technical Committee (IEC) technical committee (TC9) 22nd work team (WG22) has formulated train communication network international standard, namely the TCN standard. In 2002, the standard promulgated by the Ministry of Railways also officially recognized it as the train communication network standard. TCN (Train Communication Network) is consisted of two-level networks including wired train bus (WTB) and multifunction vehicle bus (MVB). The role of MVB is to connect the programmable device in each vehicle, and WTB is to connect each vehicle train. MVB has become a standard communication bus for next generation vehicles because the MVB is the bus rapid process control optimization, applicable to vehicle bus.
At the beginning of this dissertation, the development、application and background for TCN are introduced in one section. Then, in order to better understanding and analysis the TCN, The mainstreams of train communication network at home and abroad, such as LonWorks, WorldFIP, CAN are compared and analyzed at the technical level. The third section research and analyze the second level of train communication network——MVB, focusing on analysis of MVB communication network structure, network data, medium access and network layers (including the physical layer and data link layer); in addition, further elaborate the MVB communication network interface equipment classification, port and network controller. The fourth and fifth section mainly aims at the simulation part. Fourth for the use of the simulation platform ——Simulink and Stateflow, the fifth section describes the model construction and waveform analysis.
The simulation is completed in the Matlab environment, using modular method of formal model of MVB communication network, make the MVB communication process more clear, and make the network more easily understood. Not only the communication bus system simulation is presented to build simulation model of dynamic, but also provides a broad prospect for the further research of fieldbus control system performance.
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