基于混合调度算法汽车TTCAN网络设计及实时性分析

Mixed-algorithm-based automotive TTCAN network design and its real-time analysis

针对汽车控制系统CAN总线在处理周期性信号和随机性信号时具有不确定性和信息易死锁等缺陷问题,把服务于时间触发的均匀装载(AL)算法和服务于事件触发的动态优先级提升(DPP)算法相结合,提出了一种基于时间触发的控制器局域网(TTCAN)协议的混合调度策略,介绍了混合调度算法原理及实时性分析方法,构建了基于混合算法的汽车TTCAN系统矩阵,通过应用实例分析,验证了该方案满足汽车控制系统的实时性要求.

When the periodic and stochastic signals are processed via the controller area network （CAN） bus in an automotive control system,there exist such inefficiencies as uncertainty and information dead-locking. In this regard,a time-trigged CAN （TTCAN） protocol-based mixed scheduling （MS） algorithm is proposed based on both time-triggered average loading （AL） algorithm and event-triggered dynamic priority promotion （DPP） algorithm. Furthermore,a real-time analysis of the mixed scheduling algorithm is completed pertaining to an automotive TTCAN system matrix. Finally,it is illustrated that this approach satisfies the real-time demands for the automotive control system.