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。
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 s effect time. improve the performance of control system and stabilize system'
出处
《计算机工程》
CAS
CSCD
北大核心
2017年第8期90-94,100,共6页
Computer Engineering
基金
国家自然科学基金(61562051)
云南省应用基础研究计划重点项目(2014FA029)
关键词
嵌入式控制
状态转移
调度
确定性
约束条件
embedded control
state transition
scheduling
determinacy
constraint condition