| 基于滑模观测器的故障检测与重构方法 |
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| 引用本文： | 王莹,李书臣,崔东艳.基于滑模观测器的故障检测与重构方法[J].桂林电子科技大学学报,2007,27(1):37-40. |
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| 作者姓名： | 王莹 李书臣 崔东艳 |
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| 作者单位： | 辽宁石油化工大学信息与控制工程学院,辽宁,抚顺,113001 |
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| 摘 要： | 针对不确定控制系统的故障诊断问题,提出了一种利用滑模观测器进行故障检测与重构的方法.首先设计滑模观测器,以实现系统的执行机构和传感器的故障重构,然后在对系统传感器的故障重构中,采用设计二级观测器构造一个虚拟等效系统的方法提高重构精度,通过运用低通滤波器,将原始的传感器故障以执行器故障的形式表示,并用线性矩阵不等式(LMI)方法来设计观测器.该方法能够更准确的估计出系统的传感器故障,最后给出的数值仿真实例说明了其有效可行性.
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| 关 键 词： | 故障检测与重构 滑模 观测器 线性矩阵不等式 |
| 文章编号： | 1673-808X（2007）01-0037-04 |
| 修稿时间： | 2006-12-06 |
Fault detection and reconstruction method based on sliding mode observers |
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| WANG Ying,LI Shu-chen,CUI Dong-yan.Fault detection and reconstruction method based on sliding mode observers[J].Journal of Guilin Institute of Electronic Technology,2007,27(1):37-40. |
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| Authors: | WANG Ying LI Shu-chen CUI Dong-yan |
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| Affiliation: | School of Information and Control Engineering, Liaoning Shihua University, Fushun 113001, China |
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| Abstract: | In response to the fault diagnosis research in uncertain control systems,a method for fault detection and reconstruction using sliding mode observers is proposed.The sliding mode observer is designed to realize the reconstruction of the actuator fault and the sensor fault.Then during the reconstruction of the sensor fault,a fictitious equivalent system is produced to improve the accuracy by designing the secondary observer.The original sensor fault appears as an actuator fault using a low filter and the observer is designed by linear matrix inequalities(LMI).This method can estimate the existing fault of the sensor directly and reconstruct the fault more correctly.Simulation results confirmed the effectiveness and feasibilities of the proposed approach. |
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| Keywords: | fault detection reconstruction sliding mode observer linear matrix inequalities |
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