冗余容错、时间触发技术在汽车控制局域网的实现

Fault-Tolerant Time-Triggered Communication Technique in CAN

借鉴TTCAN总线时间触发机制和静态调度的特点,利用微控制器的硬件中断,结合软件编程,本着低成本、高效可靠的原则,设计了一个基于时间触发的双通道的具冗余调度管理的汽车控制局域网通信系统,并通过模拟实验进行了测试。从测试结果看,系统在通道失效的情况下仍能保证可靠运行,并能抑制不一致消息重复率,提高带宽利用率,表明了该汽车控制局域网通信系统具有可行性和进一步研究开发的价值。

According to the static time- triggered schedule of time- triggered controller area network（TTCAN）, this paper present a lowcost redundancy- management time- triggered schedule for controller area network（CAN）, by the use of hardware periodical interrupt of micro - controller, software programming technique. This design helps to ensure that system to remain running reliably on the event of failures in the underlying communications channels, to decrease the probability of inconsistent message delivery and increase the bandwidth utilixation. The result d experiment suggests that the creation of reliable, low-cost distributed system in CAN is practical.