Optimal State Estimation and Fault Diagnosis For a Class of Nonlinear Systems

doi:10.1109/JAS.2020.1003051

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	Optimal State Estimation and Fault Diagnosis For a Class of Nonlinear Systems
	Hamed Kazemi; Alireza Yazdizadeh
刊名	IEEE/CAA Journal of Automatica Sinica
	2020
卷号	7 期号:2 页码:517-526
关键词	Differential geometry fault detection and isolation (FDI) fault diagnosis neural network (NN) nonlinear observer and filter design optimal state estimation
ISSN号	2329-9266
DOI	10.1109/JAS.2020.1003051
英文摘要	This study proposes a scheme for state estimation and, consequently, fault diagnosis in nonlinear systems. Initially, an optimal nonlinear observer is designed for nonlinear systems subject to an actuator or plant fault. By utilizing Lyapunov's direct method, the observer is proved to be optimal with respect to a performance function, including the magnitude of the observer gain and the convergence time. The observer gain is obtained by using approximation of Hamilton-Jacobi-Bellman (HJB) equation. The approximation is determined via an online trained neural network (NN). Next a class of affine nonlinear systems is considered which is subject to unknown disturbances in addition to fault signals. In this case, for each fault the original system is transformed to a new form in which the proposed optimal observer can be applied for state estimation and fault detection and isolation (FDI). Simulation results of a single-link flexible joint robot (SLFJR) electric drive system show the effectiveness of the proposed methodology.
内容类型	期刊论文
源URL	[http://ir.ia.ac.cn/handle/173211/42973]
专题	自动化研究所_学术期刊_IEEE/CAA Journal of Automatica Sinica
推荐引用方式 GB/T 7714	Hamed Kazemi,Alireza Yazdizadeh. Optimal State Estimation and Fault Diagnosis For a Class of Nonlinear Systems[J]. IEEE/CAA Journal of Automatica Sinica,2020,7(2):517-526.
APA	Hamed Kazemi,&Alireza Yazdizadeh.(2020).Optimal State Estimation and Fault Diagnosis For a Class of Nonlinear Systems.IEEE/CAA Journal of Automatica Sinica,7(2),517-526.
MLA	Hamed Kazemi,et al."Optimal State Estimation and Fault Diagnosis For a Class of Nonlinear Systems".IEEE/CAA Journal of Automatica Sinica 7.2(2020):517-526.