Abstract
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 carried 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.
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