The train control network plays a key role in the train control system. Its real-time performance directly influences the safety and reliability of train operation. Analyzing and evaluating its real-time performance can optimize the application layer of the train control network, direct suitable network configuration and optimize the network performance, so as to ensure the safety and reliability of train operation. This paper discusses the data frame type, data communication and automatic reconfiguration process of the ARCNET network. It also analyzes the communication delay time parameter in the ARCNET network, and then establishes a delay time model of the ARCNET communication network. Using the constructed model, it analyzes the real-time performance of the network. Based on the analysis, it provides a solution to improve the real-time performance. Finally based on the established control network, in order to validate the constructed model, it compares the experiment results with the calculated results of the model. Using the result of the analysis and the math model of the communication time delay, it calculates the system polling cycle to provide the principle to the design of the network application layer.%列车控制网络在列车控制系统中起着非常重要的作用,其实时性能直接影响到列车的安全可靠运行.对其实时性能进行分析评价可以优化设计列车控制网络的应用层,合理配置网络,优化网络性能,从而保证列车的安全可靠运行.本文介绍ARCNET列车控制网络的数据帧类型,数据通信机制和自动重构过程等,并对ARCNET网络通信延迟时间参数进行分析,建立ARCNET网络数据通信延迟时间模型、分析其网络实时性,并提出改进网络实时性的方法.最后在搭建的网络控制系统中,对实验测试结果和模型计算结果进行比较,验证模型的正确性.并利用分析结果以及建立的通信延迟时间数学模型,计算开发基于ARCNET轻轨列车网络控制系统的轮询周期,为系统应用层设计提供依据.
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