Abstract: In the execution process of status transfer tasks for embedded control systems,the schedulability of events is difficult to guarantee and it needs high costs when a task is preempted.Aiming at these problems,this paper constructs a predictive scheduling model combining Feedforward prediction Model(FFM) and Feedback Monitoring Model(FMM).It adds the real-time label of constraint condition including value and timing constraints,so as to adjust the order of events in the released queue in real time and improve the real-time performance and determinacy of the control system.The result of simulation shows that the proposed model can improve the performance of control system and stabilize system’s effect time.

Key words: embedded control, state transition, scheduling, determinacy, constraint condition

摘要： 在嵌入式控制系统执行状态转移任务的过程中,存在事件可调度性难以保证和抢占任务成本高的问题。为此,构建一种结合前馈预测模型与反馈监测模型的预测调度模型。增加同时具有价值量约束与时钟约束的实时约束标签,以实时调整事件在释放队列中的顺序,提高控制系统的实时性与确定性。仿真结果表明,该模型能有效提高控制系统性能,稳定系统作用时间。

关键词: 嵌入式控制, 状态转移, 调度, 确定性, 约束条件

CLC Number: 

• TP302.7