| 计算机控制中的模糊调度设计 |
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| 引用本文： | 金宏,王宏安,唐雪梅,王晖. 计算机控制中的模糊调度设计[J]. 计算机学报, 2006, 29(3): 414-422 |
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| 作者姓名： | 金宏 王宏安 唐雪梅 王晖 |
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| 作者单位： | 中国科学院软件研究所,北京,100080;北京特种机电研究所,北京,100012 |
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| 基金项目： | 中国科学院资助项目;国家科技攻关项目 |
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| 摘 要： | 研究了具有模糊截止期的多控制任务的实时调度问题，提出了奉献度的概念和最大奉献优先（LDF）的调度策略．为了减小因任务间频繁切换造成的系统开销。提出了基于抢占阈值的最大奉献优先（TLDF）调度策略．最后，通过仿真比较了LDF和TLDF两种调度策略，实现了具有模糊截止期的控制任务调度，在减少并均衡控制性能损失的同时提高系统计算资源的使用率．
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| 关 键 词： | 计算机控制系统 控制任务 实时调度 模糊 协同设计 |
| 收稿时间： | 2004-07-23 |
| 修稿时间： | 2004-07-232005-12-07 |
Fuzzy Scheduling Design in Computer Control |
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| JIN Hong,WANG Hong-An,TANG Xue-Mei,WANG Hui. Fuzzy Scheduling Design in Computer Control[J]. Chinese Journal of Computers, 2006, 29(3): 414-422 |
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| Authors: | JIN Hong WANG Hong-An TANG Xue-Mei WANG Hui |
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| Affiliation: | 1.Institute of Software, Chinese Academy of Sciences, Beijing 100080;2.Beijing Institute of Special Machine and Electricity, Beijing 100012 |
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| Abstract: | In order to improve the control performance of systems and use the limited computing resource reasonably,it is necessary to consider the codesign problem between control and real-time scheduling in computer-controlled systems synthetically.In this paper,the real-time scheduling problem of multiple control tasks with fuzzy deadlines is studied.The concept of dedication index and the scheduling policy of largest dedication first(LDF) are proposed.In order to relieve the overhead caused by the thrashing among tasks,the threshold-based largest dedication first(TLDF) is presented.Finally,Two proposed scheduling policies LDF and TLDF are compared by simulation.The scheduling of control tasks with fuzzy deadlines is implemented,and the utilization of computing resource gets increased meanwhile the control performance cost gets decreased and tradeoff. |
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| Keywords: | computer-controlled systems control tasks real-time scheduling fuzzy codesign |
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