Fault reconstruction observer design for continuous-time systems with measurement disturbances via descriptor system approach  

作　　者：Qingxian Jia Yingchun Zhang Chengliang Li Xueqin Chen 

机构地区：[1]Research Center of Satellite Technology,Harbin Institute of Technology [2]Aerospace Dongfanghong Development Ltd

出　　处：《Journal of Systems Engineering and Electronics》2014年第5期877-885,共9页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(61104026);the Open Funding for National Defense Key Subject Laboratory of Micro and Small Spacecraft Technology(20090450126)

摘　　要：This paper addresses a problem of observer-based sensor fault reconstruction for continuous-time systems subject to sensor faults and measurement disturbances via a descriptor system approach. An augmented descriptor plant is first formulated, by assembling measurement disturbances and sensor faults into an auxiliary state vector. Then a novel descriptor state observer for the augmented plant is constructed such that simultaneous reconstruction of original system states, sensor faults and measurement disturbances are obtained readily. Sufficient conditions for the existence of the proposed observer are explicitly provided, and the application scope of the observer is further discussed. In addition, an extension of the proposed linear approach to a class of nonlinear systems with Lipschitz constraints is investigated. Finally, two numerical examples are simulated to illustrate the effectiveness of the proposed fault-reconstructing approaches.This paper addresses a problem of observer-based sensor fault reconstruction for continuous-time systems subject to sensor faults and measurement disturbances via a descriptor system approach. An augmented descriptor plant is first formulated, by assembling measurement disturbances and sensor faults into an auxiliary state vector. Then a novel descriptor state observer for the augmented plant is constructed such that simultaneous reconstruction of original system states, sensor faults and measurement disturbances are obtained readily. Sufficient conditions for the existence of the proposed observer are explicitly provided, and the application scope of the observer is further discussed. In addition, an extension of the proposed linear approach to a class of nonlinear systems with Lipschitz constraints is investigated. Finally, two numerical examples are simulated to illustrate the effectiveness of the proposed fault-reconstructing approaches.

关 键 词：fault reconstruction descriptor system approach ob- server design measurement disturbance. 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]