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Fault detection for output feedback control systems with actuator stuck faults: A steady‐state‐based approach
Author(s) -
Yang GuangHong,
Wang Heng,
Xie Lihua
Publication year - 2010
Publication title -
international journal of robust and nonlinear control
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.361
H-Index - 106
eISSN - 1099-1239
pISSN - 1049-8923
DOI - 10.1002/rnc.1546
Subject(s) - control theory (sociology) , weighting , actuator , fault detection and isolation , residual , fault (geology) , controller (irrigation) , constant (computer programming) , bounded function , computer science , plant , engineering , control engineering , control (management) , mathematics , algorithm , medicine , mathematical analysis , artificial intelligence , seismology , biology , agronomy , radiology , programming language , geology
The paper studies the fault detection problem for output feedback control systems with bounded disturbances and nonzero constant reference inputs. A steady‐state‐based approach is proposed which can be used to detect small actuator stuck faults including actuator outage (the stuck value is zero). These small stuck faults, especially the outage faults, cannot be detected effectively using the existing techniques. A dynamic output feedback controller and a weighting matrix are designed simultaneously. The dynamic output feedback controller stabilizes the closed‐loop system for both fault‐free and faulty cases and attenuates the effects of disturbances. By manipulating the steady‐state values of system states with the detection weighting matrix, a residual is then generated, through which actuator stuck faults including actuator outages can be detected effectively. Simulation results are included to demonstrate our design procedure. Copyright © 2009 John Wiley & Sons, Ltd.