期刊
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
卷 61, 期 9, 页码 2518-2524出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAC.2015.2491898
关键词
Fault estimation; intermediate estimator; intermediate variable; nonlinear systems
资金
- Funds of National Science of China [61273148, 61420106016]
- Foundation for the Author of National Excellent Doctoral Dissertation of China [201157]
- State Key Laboratory of Synthetical Automation for Process Industries [2013ZCX01]
This technical note investigates the problem of fault estimation for a class of nonlinear systems with Lipschitzian nonlinearities. In most of the existing fault estimation approaches, the observer matching condition should be satisfied. However, this condition is hard to meet for many systems. To overcome this restriction, a new fault estimation method is proposed, where an intermediate variable is introduced and a specially designed intermediate estimator is proposed to estimate the state and the faults simultaneously by exploiting the properties of fault distribution matrix. It is proved that the states of the error system are uniformly ultimately bounded. Simulation examples verify the effectiveness of the proposed method.
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