| 远程控制时滞系统的故障诊断和容错控制 |
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| 引用本文： | 李 娟,叶若红,尚书旗.远程控制时滞系统的故障诊断和容错控制[J].农业工程学报,2008,24(11):145-149. |
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| 作者姓名： | 李 娟 叶若红 尚书旗 |
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| 作者单位： | 青岛农业大学机电工程学院,青岛,266109 |
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| 摘 要： | 针对设施农业远程控制系统中含有控制时滞和测量时滞的情况,研究其发生不可直接测量故障时的故障诊断和容错控制方法。首先设计了系统在故障情况下的最优容错控制律,并证明了最优容错控制律的存在唯一性。为了进行故障诊断并解决最优控制的物理不可实现问题,给出了一种测量时滞的无时滞转换方法,并通过构造含有故障状态的增广系统的降维状态观测器,设计了在线诊断故障的故障诊断器并同时实现了系统状态的观测。最后利用故障诊断的结果给出了物理可实现的动态最优容错控制律。仿真结果验证了该故障诊断方法和动态最优容错控制律的有效性。
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| 关 键 词： | 远程控制 故障诊断 容错控制 最优控制 时滞系统 无时滞变换 |
| 收稿时间： | 2007/10/30 0:00:00 |
| 修稿时间： | 2008/4/10 0:00:00 |
Fault diagnosis and fault-tolerant control for remote monitoring systems with delayed controls and measurements |
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| Li Juan,Ye Ruohong and Shang Shuqi.Fault diagnosis and fault-tolerant control for remote monitoring systems with delayed controls and measurements[J].Transactions of the Chinese Society of Agricultural Engineering,2008,24(11):145-149. |
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| Authors: | Li Juan Ye Ruohong and Shang Shuqi |
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| Institution: | College of Mechanical and Electrical Engineering,Qingdao Agricultural University,Qingdao 266109,China,College of Mechanical and Electrical Engineering,Qingdao Agricultural University,Qingdao 266109,China and College of Mechanical and Electrical Engineering,Qingdao Agricultural University,Qingdao 266109,China |
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| Abstract: | Facing to the remote monitoring systems with delayed controls and measurements in facility agriculture,the problems of fault diagnosis and fault-tolerant control were investigated.The optimal fault-tolerant control law for faulty systems was designed,and the uniqueness of the optimal fault-tolerant control law was proved.In order to diagnose faults and to solve the physically unrealizable problems of the optimal fault-tolerant control law,a delay-free transformation approach was given for delayed measurements.The on-line fault diagnosis and the observation of system states were realized by constructing the reduced-order state observer for the augmented system comprising fault states.Finally,the physically realizable dynamic optimal fault-tolerant control law was obtained by utilizing the results of fault diagnosis.Simulation results demonstrate the validity of both the fault diagnosis scheme and the dynamic optimal fault-tolerant control law. |
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| Keywords: | remote monitoring systems fault diagnosis fault-tolerant control optimal control time-delay systems delay-free transformation |
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