Adaptive Fault Diagnosis Observer Design for a Class of Nonlinear System with Model Uncertainties

被引：0

作者：

Jang, Seung Jin ^{[1
]}

Lee, Jae Young ^{[1
]}

Park, Jin Bae ^{[1
]}

Choi, Yoon Ho ^{[2
]}

机构：

[1] Yonsei Univ, Dept Elect & Elect Engn, Seoul 120749, South Korea

[2] Kyonggi Univ, Dept Elect Engn, Suwon, South Korea

来源：

2012 PROCEEDINGS OF SICE ANNUAL CONFERENCE (SICE) | 2012年

关键词：

Adaptive fault diagnosis observer; Lyapunov stability analysis; e-modification; saturation term; TOLERANT CONTROL; ACTUATOR;

D O I：

暂无

中图分类号：

TP301 [理论、方法];

学科分类号：

081202 ;

摘要：

In this paper, we propose an adaptive fault diagnosis observer (AFDO) for a class of nonlinear systems with uncertainties. The AFDO, which estimates the faults in real time, is designed based on Lyapunov analysis. We design the adaptive fault estimation laws for AFDO by using the characteristics of output errors. Moreover, in order to handle the chattering problem, we modify the output error term to saturation term. And we add the e-modification term to handle the parameter drift, which also relaxes the assumption that the information about the upper bound of disturbance-es is known prior. By Lyapunov analysis, we prove the uniform ultimately boundedness (UUB) of the system output error and unpredictable faults. Finally, we verify the effectiveness of the proposed method through computer simulations.

引用

页码：1116 / 1119

页数：4

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