CAN网络信息传输的实时性分析

Analysis of real time ability of message transmission based on CAN systems

研究CAN总线的实时性,分析了CAN总线信息传输延时的组成,论述了CAN网络信息延时中帧延时和媒体访问延时两个主要部分,并对软件延时和CAN控制器延时等相对固定的部分进行了说明,设计和完成了旨在模拟信息传输的基于CAN总线的PC机通讯实验,验证了CAN网络的一些工作条件,探索了其实时性、可靠性的改善方法.

The real time ability of the Controller Area Network is researched and the composition of delay time of message transmission based on CAN systems is analysed.The frame and MAC (Medium Access Control) delay time are mainly discussed, and software delay time and CAN Controller delay time are mentioned as well. Besides, PC communication experiment based on CAN is designed to imitate message transmission between two net nodes in order to validate some work conditions of CAN and explore the methods improving the realtime ability and reliability of CAN.