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针对传统CAN总线无法满足车电系统进一步发展对总线实时性和确定性要求的难题,引入具有时间触发机制的TTCAN(Time-Triggered Controller Area Network)网络,给出了一种车电系统TTCAN网络调度算法。在此基础上,构建了一种新的车电系统TTCAN网络调度设计方案,并以消息的最差响应时间、最大发送周期抖动和总线带宽利用率为性能指标分析了该方案的性能,分析表明:该方案具有良好的实时性、确定性和高的总线带宽利用率。
In order to solve the problem that the traditional CAN bus can not meet the requirement of real-time and deterministic bus, the TTCAN (Time-Triggered Controller Area Network) with time-triggered mechanism is introduced, and a TTCAN network scheduling algorithm. On this basis, a new TTCAN network scheduling design scheme is established, and the performance of this scheme is analyzed based on the worst response time of message, the maximum sending period jitter and bus bandwidth utilization. The analysis shows that : The program has good real-time, deterministic and high bus bandwidth utilization.