【摘要】 CRH2型列车的列车级网络主要是双环网结构,很多文章对列车通信网络的仿真研究所采取的方案都是基于总线型的网络结构,而这种结构与列车的双环网结构有较大的差异。为解决上述问题,设计一种从结构到协议都高度模拟双环网的仿真方案,并搭建了一个基于OPNET软件的仿真平台。通过仿真平台,对列车网络"各节点正常"和"有节点故障"两种情况分别进行仿真研究,发现测试数据均按照双环网络结构来传输,与实际情况一致。仿真结果表明,所设计的方案与仿真平台准确地反映了列车双环网络的运行情况,证明了该平台的正确性和可靠性,为后续进一步研究列车网络故障等问题奠定了基础。更多还原

【Abstract】 CRH2 EMU’s train-level control network uses double-loop network structure,but many articles on the train communication network simulation research are based on the bus-based network structure,which have the big difference with the double-ring network structure of the train. In order to solve the above problems,a simulation scheme was proposed to simulate the double-loop network from structure to protocol,and a simulation platform based on OPNET was built. Through the simulation platform,the train network were simulated both in normal and fault case. We found that the test data are transmitted in accordance with the dual-ring network structure,consistent with the actual situation. The simulation results show that the designed scheme and simulation platform accurately reflect the operation of the double-loop network,and prove the correctness and reliability of the platform,which lays the foundation for further research on the train network fault.更多还原