CAN总线测试与仿真平台的系统设计

发布时间：2018-04-22 17:09

本文选题：CAN总线 + 柴油机　；参考：《上海工程技术大学》2016年硕士论文

【摘要】：由于电子技术的日益成熟,现代车辆已趋向电子化发展。汽车网络可分为高速总线子网、中速总线子网、低速总线子网,各总线子网上带有相关电子控制单元,各个电子控制单元与子网之间通过总线进行数据交换,通过中央网关完成各子网数据传输和速率的转换。本文基于ISO11898高速子网协议,设计了船用安保监控系统,对该系统高速子网进行测试。研究了CAN总线对物理层和数据链路层的具体规范,并设计了CAN总线测试节点与仿真网络。本文主要对CAN物理层进行测试,对CAN总线物理导线的故障类型进行模拟测试。采用示波器采集相应故障类型的总线传输波形,实现了故障可视化与验证分析。课题遵循了CAN总线2.0A/B规范,以课题实际应用的需求为出发点,设计并实现了基于CAN总线船用柴油机监控仿真系统,课题完成了仿真系统的全部硬件和软件的设计和实现。以此为基础,将仿真系统用于真实的环境中测试,通过系统可成功控制实际柴油机的收发信息,利用仿真监控系统采集车辆中CAN总线上的数据流并进行分析。结合仿真系统的实际中的应用,分析了CAN总线在船用柴油机监控系统的作用和工作机制。此外,课题还模拟CAN总线各种可能出现的故障,如:模拟和仿真了CAN总线CAN_H和CAN_L线断路、CAN_H和CAN_L线同电源电压短接、CAN_L和CAN_H线同地短接、CAN_L线与CAN_H线短接和失去一条与终端网络的连接等故障,并用示波器记录故障波形,实现了故障的可视化。
[Abstract]:Due to the maturity of electronic technology, modern vehicles have become electronic. Automobile network can be divided into high speed bus subnet, medium speed bus subnet, low speed bus subnet, each bus subnet has correlative electronic control unit, each electronic control unit and subnet exchange data by bus. The data transmission and rate conversion of each subnet are completed through the central gateway. Based on the ISO11898 high-speed subnet protocol, a marine security monitoring system is designed and tested. The specification of physical layer and data link layer based on CAN bus is studied, and the test node and simulation network of CAN bus are designed. This paper mainly tests the CAN physical layer and simulates the fault types of CAN bus physical conductors. Oscilloscope is used to collect the transmission waveform of the corresponding fault type bus, and the fault visualization and verification analysis are realized. According to the 2.0A/B specification of CAN bus and the requirement of practical application, a marine diesel engine monitoring and simulation system based on CAN bus is designed and implemented. The whole hardware and software of the simulation system are designed and implemented. On this basis, the simulation system is used to test the real environment. The system can successfully control the receiving and sending information of the actual diesel engine, and use the simulation monitoring system to collect and analyze the data flow on the CAN bus of the vehicle. Combined with the practical application of the simulation system, the function and working mechanism of CAN bus in marine diesel engine monitoring system are analyzed. In addition, the subject also simulates various possible failures of the CAN bus. For example, the CAN bus CAN_H and CAN_L lines are broken, and the CANSP and CAN_L lines are connected with the same power supply voltage. The CANL and CAN_H lines are connected with the CAN_H line and the missing terminal network. The fault waveforms are recorded by oscilloscopes. The visualization of fault is realized.
【学位授予单位】：上海工程技术大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U463.6

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