Excessive load on train communication network results in data transmission delay or loss,thereby affecting the effi-ciency and accuracy of system feedback control.To ensure the safety of the train communication network,a train communication net-work status feedback control system based on CANopen protocol is designed.Add the CANopen protocol gateway device,modify the train communication network data collector and network status feedback controller,and adjust the connection mode of the feedback controller driving circuit to optimize the hardware of the system.The CANopen is taken as the communication protocol for the train communication network,the real—time status data of the train communication network is collected using the message capturing.By extracting and matching the network status features,the current state of the train communication network is determined.The control variables of the train communication network are calculated through the factors of buffer length,load,and delay.The status feedback control of the train communication network is achieved through two steps of the fair allocation of train communication network chan-nels and train communication network congestion scheduling control.Experimental results show that under the railway train and high-way train communication network environments,the load control average errors reaches by 0.6 Mbps and 0.8 Mbps,respectively.By using the proposed method,the buffer queue average length of the train communication network reaches by 10Mbps,the results show that the optimal method has significant advantages in control functionality and effectiveness.
关键词
CANopen协议/列车通信网络/状态反馈/网络状态控制
Key words
CANopen protocol/train communication network/status feedback/network state control
维普
万方数据