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检索条件"作者=Lihua Liu 1 , Xiukun Wei 2 , Xiaohe Liu 1 1. Institute of Automation, beijing Information Science and Technology university, beijing 100192, china2. state key laboratory of rail traffic control and safety, beijing jiaotong university, beijing 100044, china"

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Fault Diagnosis for High Order LTI Systems Based on Model Decomposition

Fault Diagnosis for High Order LTI Systems Based on Model De...

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第24届中国控制与决策会议

作者： lihua liu 1 ,{1., xiaohe liu 1 1. institute of automation, beijing information science and technology university, beijing 100192, china2. state key laboratory of rail traffic control and safety, beijing jiaotong university, beijing 100044, china

Fault detection observer and fault estimation filter are the main tools for the model based fault diagnosis approach. The dimension of the observer gain normally depends on the system order and the system output dimension. The fault estimation filter traditionally has the same system dimension of the monitored system. For high order systems, these methods have the potential problems such as parameter optimization and the real implementation on-board for applications. In this paper, the system dynamical model is first decomposed into a special structure. With the new model, a fault detection system can be designed such that only the residuals with the same dimension as the size of the faults are sensitive to the faults. The rest residuals are totally decoupled from the faults. A lower order （with the same size of the fault） fault estimation filter design approach is proposed. Further, the design of a static fault estimation matrix is presented for further improving the fault estimation precision. The proposed method is demonstrated by a simulation example.

关键词： Fault diagnosis high order model decomposition observer filter

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Fault Estimation of Large Scale Wind Turbine Systems

Fault Estimation of Large Scale Wind Turbine Systems

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第二十九届中国控制会议

作者： wei xiukun 1,2,liu lihua 3 1.state key laboratory for rail traffic control and safety,beijing jiaotong university,beijing 100044,P.R.china2.traffic and Transportation School,beijing jiaotong university,beijing 100044,P.R.china 3.institute of automation,beijing information science and technology university,beijing 100192,P.R.china

Fault diagnosis of large scale wind turbine systems has received much attention in the recent *** fault prediction would allow for scheduled maintenance and for avoiding catastrophic *** the availability of wind turbines can be enhanced and the cost for maintenance can be *** this paper,we consider the sensor and actuator fault detection issue for large scale wind turbine systems where the individual pitch control is used for loads *** faults considered in the paper are mainly the blade root bending moment sensor faults and blade pitch actuator *** the aid of a dynamical model of the wind turbine system,A dynamic filter,which is designed based on GKYP lemma in the finite frequency domain,is used to estimate the fault *** effectiveness of the proposed approach is demonstrated by simulation results for several fault scenarios.

关键词： Fault estimation Filter Design Robustness GKYP lemma

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Robust Fault Detection Dynamic Observer Design for LTI Systems

Robust Fault Detection Dynamic Observer Design for LTI Syste...

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201. Chinese control and Decision Conference

作者： xiukun wei~1,liu lihua~2,Guoqiang Cai~1,Yong Qin~1,Limin Jia~1 1.state key laboratory of rail traffic control and safety,beijing jiaotong university Haidian District Shang Yuan Cun 3,100044,beijing,china. 2.institute of automation,beijing information science & technology university,beijing,china.

Dynamic observer provides more freedom to meet the diversified performance specifications for fault detection purpose in contrast with static ***,little attention is paid on its design and only a few papers investigated how to design a fault detection dynamic *** this work,we propose an innovative dynamic observer design approach for Unear time invariant(LTI) systems subjected to unknown disturbance and possible faults with the aid of the generalized KYP lemma developed *** dynamic observer is designed such that the disturbances are attenuated to a specified level to meet the Hperformance in the concerned finite frequency interval while the sensitivity to the possible faults in its frequency domain is maximized in the Hindex *** existence conditions of such an observer are given in terms of Unear matrix inequaUties(LMIs).An iterative algorithm is presented to achieve the *** effectiveness of the proposed method is illustrated by a numerical example.

关键词： Fault Detection Threshold Design Dynamic Observer GKYP Lemma

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