| 控制系统中实时任务的动态优化调度算法 |
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| 引用本文： | 刘 怀,费树岷.控制系统中实时任务的动态优化调度算法[J].控制与决策,2005,20(3):246-250. |
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| 作者姓名： | 刘 怀 费树岷 |
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| 作者单位： | 南京师范大学,电气与电子工程学院,江苏,南京,210042;东南大学,自动化研究所,江苏,南京,210096 |
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| 基金项目： | 南京师范大学科研基金项目(2003KZXXGQ2B88). |
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| 摘 要： | 提出一种新的调度算法——带有非周期服务器的EDF调度算法.分析了所有任务的可调度性,给出了可调度条件,并给出一种新的周期性任务模型以及主优先级和辅助优先级的概念.它们在保证任务可调度的前提下,对周期性任务的采样频率和控制延时进行优化.仿真结果表明,该算法可以提高周期性任务的采样频率,并降低控制延时,即能优化系统的性能.
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| 关 键 词： | 采样频率 周期性任务 非周期任务 非周期服务器 控制延时 |
| 文章编号： | 1001-0920(2005)03-0246-05 |
| 修稿时间： | 2003年9月22日 |
Optimal dynamic scheduling algorithm for real-time tasks in digital control systems |
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| LIU Huai,FEI Shu-min.Optimal dynamic scheduling algorithm for real-time tasks in digital control systems[J].Control and Decision,2005,20(3):246-250. |
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| Authors: | LIU Huai FEI Shu-min |
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| Affiliation: | LIU Huai~1,FEI Shu-min~2 |
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| Abstract: | A novel scheduling algorithm, named Earliest Deadline First (EDF) with sporadic server, is presented. The schedulability of all tasks including the periodic tasks and the sporadic tasks is investigated, and the schedulability test is given. A new periodic task model and concepts of main priority and assistant priority are presented. By using them, the sampling frequencies of periodic tasks are optimized under maintained schedulability and the control delay of periodic task is reduced. The result of simulation shows that the sampling frequencies of periodic tasks can be increased and the control delays of periodic tasks can be reduced. |
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| Keywords: | sampling frequency periodic task sporadic tasks sporadic sever control delay |
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