海南师范大学学报：自然科学版
海南師範大學學報：自然科學版
해남사범대학학보：자연과학판
Journal of Hainan Normal University:Natural Science
2012年
2期
162-164,168
,共4页
网络化控制系统%采样周期%网络诱导时延%实时反馈调度器
網絡化控製繫統%採樣週期%網絡誘導時延%實時反饋調度器
망락화공제계통%채양주기%망락유도시연%실시반궤조도기
networked control systems%sampling period%network-induced delay%real-time feedback scheduler
随着计算机科学技术、控制理论和网络通信技术的发展，网络化控制系统受到越来越多的关注．由于网络化控制系统的网络带宽的限制使得网络化控制系统不可避免地存在网络诱导时延，网络诱导时延在一定程度上会降低网络化控制系统的性能．为了优化整个控制系统的性能，文章研究了系统采样周期的优化问题，提出了实时反馈调度器．为此，系统目标函数的选取根据采样周期、网络诱导时延以及作用在系统上的噪声，具体做法根据当前各个子系统中被控对象的状态和噪声特性，周期地分配新的采样周期给各个子系统，最后给出实验结果．
隨著計算機科學技術、控製理論和網絡通信技術的髮展，網絡化控製繫統受到越來越多的關註．由于網絡化控製繫統的網絡帶寬的限製使得網絡化控製繫統不可避免地存在網絡誘導時延，網絡誘導時延在一定程度上會降低網絡化控製繫統的性能．為瞭優化整箇控製繫統的性能，文章研究瞭繫統採樣週期的優化問題，提齣瞭實時反饋調度器．為此，繫統目標函數的選取根據採樣週期、網絡誘導時延以及作用在繫統上的譟聲，具體做法根據噹前各箇子繫統中被控對象的狀態和譟聲特性，週期地分配新的採樣週期給各箇子繫統，最後給齣實驗結果．
수착계산궤과학기술、공제이론화망락통신기술적발전，망락화공제계통수도월래월다적관주．유우망락화공제계통적망락대관적한제사득망락화공제계통불가피면지존재망락유도시연，망락유도시연재일정정도상회강저망락화공제계통적성능．위료우화정개공제계통적성능，문장연구료계통채양주기적우화문제，제출료실시반궤조도기．위차，계통목표함수적선취근거채양주기、망락유도시연이급작용재계통상적조성，구체주법근거당전각개자계통중피공대상적상태화조성특성，주기지분배신적채양주기급각개자계통，최후급출실험결과．
With the development of computer science and technology, control theory and communication technology, networked control systems have got more and more attention. Because of limited resources, there exist network-induced delays inevitably in the networked control systems, which can degrade the systems performance at a certain extent. The problem of optimal assignment of sampling period is studied in order to optimize the performance of networked control systems. The cost function of subsystems is elected according to sampling period, network-induced delay and character- istic of noise. Based on these, a real-time feedback scheduler is developed to periodically assign new sampling period based on current plant states of subsystem and noise intensities. At last, the experiment is presented.
