基于FTT-CAN的电动汽车动态调度算法研究

摘要

针对在控制器局域网(CAN)总线中存在低优先级信息会因为高优先级信息频繁占用总线而出现的死锁问题,在车辆控制系统中引入柔性时间触发机制组建柔性事件触发控制器局域网(FTT-CAN),针对周期信息和随机信息,分别在FTT-CAN的同步相和异步相中采用最早截止期优先(EDF)调度和动态提升优先级(DPP)调度,介绍了FTT-CAN触发原理,提出基于EDF和DPP的动态调度算法,将该调度算法应用于典型电动汽车控制系统模型的调度,验证了该调度算法的优越性.%The controller area network (CAN) bus has the problem that the information with low priority may be dead-locked due to the frequent bus occupation of the information with high priority. The flexible time-triggered CAN (FTT-CAN) based on flexible time-triggered mechanism is introduced into the vehicle control system. The earliest deadline first (EDF) scheduling and dynamic promotion priority(DPP)scheduling are respectively used in the synchronous phase and asynchronous phase of the FTT-CAN for the periodic information and random information. The trigger principle of FTT-CAN is introduced. The dynamic scheduling algorithms based on EDF and DPP are proposed. The proposed dynamic scheduling algorithm is used to the scheduling of the typical electric vehicle control system model. Its superiority was verified.