基于控制器局域网络总线的发动机电子控制单元硬件在环试验台的通信系统设计

基于J1939协议的控制器局域网(controller area network,CAN)总线通信网络的开发一直是硬件在环通信平台的难点和重点,针对发动机电子控制单元(electronic control unit,ECU)硬件在环仿真平台的通信特点,应用NI VeriStand软件和NI PXI平台的CAN通信模块,构建了一套CAN总线通信网络。平台依据CAN2.0B规范并结合J1939高层协议构建硬件在环通信网络,实现ECU与上位机和组合仪表的CAN数据交互。试验台构建一套完整发动机CAN总线通信网络,完成发动机ECU硬件在环CAN总线信息收发解析、数据记录及组合仪表实时显示。

Design of Communication System of Engine Electronic Control Unit Hardware-in-the-Loop Test Bench Based on Controller Area Network Bus

The development of CAN bus communication network based on J1939 protocol has always been a difficult point in the hardware-in-the-loop communication platform. Aiming at the communication characteristics of engine ECU hardware-in-the-loop simulation platform, a CAN bus communication network was constructed by using NI VeriStand software and CAN communication module of NI PXI platform. The platform builds a hardware-in-the-loop communication network according to the CAN2.0B specification and combines the J1939 high-level protocol to realize the CAN data interaction between the ECU and the host computer and the combination meter. The test bench constructs a complete engine CAN bus communication network, completes the engine ECU hardware in-loop CAN bus information transmission and analysis, data recording and real-time display of the combined instrument.