软数控系统混合任务两级调度策略  

Two-level Hierarchical Scheduling Scheme of Hybrid Tasks for Software CNC System

作　　者：李迪[1] 万加富[1,2] 叶峰[1] 赖乙宗[1] 

机构地区：[1]华南理工大学机械工程学院,广州510640 [2]广东机电学院计算机系,广州510515

出　　处：《机械工程学报》2008年第12期157-162,共6页Journal of Mechanical Engineering

基　　金：国家自然科学基金(50575075);广东省自然科学基金(05103543);粤港关键领域重点突破和教育部“新世纪优秀人才支持计划”资助项目

摘　　要：针对软数控混合任务调度,提出一种两级结构调度策略:对实时周期性任务采用时间触发,实时突发性任务则采用事件触发。建立混合任务模型并定义相关概念,给出调度策略的架构,并对调度算法、任务可调度性及时标间隔进行深入研究。将提出的两级调度策略应用到基于Windows CE.NET的软数控系统中,分析软数控系统结构和任务划分。最后,对调度策略进行试验验证,结果表明该方法能保证混合任务的确定性,从而提高软数控系统的性能。For the scheduling of hybrid tasks for software CNC, a two-level hierarchical scheduling scheme is presented. The time-triggered mode and event-triggered mode are adopted for the real-time periodic tasks and real-time aperiodic tasks respectively. Firstly, the task model is established and the related concepts are defined. Then, the structure of scheduling scheme is proposed, and scheduling algorithm, schedulability and tick-interval are deeply researched. Subsequently, the scheduling scheme is adopted for the software CNC based on Windows CE.NET, and software CNC structure and task division are analyzed. Finally, the experimental verification of two-level hierarchical scheduling scheme is carded out and the results demonstrate that the proposed method can ensure the determination of real-time tasks, and improve the performance of software CNC system.

关 键 词：混合任务 软数控 两级调度 WINDOWS CE.NET 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]