Design of fault diagnosis observer for a class of nonlinear systems

被引：1
作者：
Sun, Rong [1 ]
Liu, Sheng [1 ]
Zhang, Yu-Fang [1 ]
机构：
[1] College of Automation, Harbin Engineering University
来源：
Sun, R. (sunrong@hrbeu.edu.cn) | 1600年 / South China University of Technology卷 / 30期
关键词：
Design of observer; Fault diagnosis; Nonlinear systems;
D O I：
10.7641/CTA.2013.21297
中图分类号：
学科分类号：
摘要：
Most of fault diagnosis algorithms deal with linear systems and nonlinear systems with states depending linearly on faults. According to essential properties of a nonlinear system, we propose a fault diagnosis algorithm for a class of nonlinear systems based on parameter estimation. The systems model is decomposed by the (B,K,φ) realization into models in which the states are affected nonlinearly by faults. By using the decoupling technology for disturbances, we make the resultant residuals to be completely robust to the unknown input disturbances. Stability of the algorithm is verified by using the Lyapunov function. Simulation results show that the proposed algorithm converges rapidly and provides perfect diagnosis for a class of nonlinear systems.
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收藏
页码：1462 / 1466
页数：4
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