基于谐波周期优化算法的汽车TTCAN调度设计
首发时间:2019-04-03
摘要:针对汽车TTCAN网络中实时控制信息通信的高性能需求,在保证负载均匀的基础上提出了的谐波周期优化算法,用于提高TTCAN网络运行中事件触发信息的实时响应,介绍了谐波周期优化方法的调度策略及设计方法,通过调度汽车工业的PSA标准消息子集,验证了该谐波优化方法在保证系统时间触发部分时间特性的前提下,有效地提高了事件触发信息的实时性。
关键词: 时间触发控制器局域网 谐波周期 均匀加载 调度
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Scheduling Design of Automotive TTCAN Control System Based on Harmonic Periods Optimization Algorithm
Abstract:To meet high performances of automotive time-triggered CAN (TTCAN) real-time control bus, a key problem is how to distribute time windows within system matrix of TTCAN, a new harmonic periods makeup (HPM) scheduling optimization algorithm based on average loading was proposed and the scheduling strategy was explained concretely. The HPM scheduling algorithm aimed to make event-triggered messages gain the maximum transmission times by minimizing the space occupied by time-triggered messages. And, a scheduling tool for TTCNA networks that generates a valid scheduling table used HPM is presented. Finally, a PSA message set is introduced to validate the algorithm,through optimization for the message set, the time performances of event triggered messages and then the whole system performances get improved.
Keywords: TTCAN Harmonic periods Average loading Schedule
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基于谐波周期优化算法的汽车TTCAN调度设计
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