DocumentCode :
1174972
Title :
Fast fault estimation and accommodation for dynamical systems
Author :
Zhang, Kai ; Jiang, Bo ; Shi, Peng
Author_Institution :
Coll. of Autom. Eng., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing
Volume :
3
Issue :
2
fYear :
2009
fDate :
2/1/2009 12:00:00 AM
Firstpage :
189
Lastpage :
199
Abstract :
The problem of fast active fault-tolerant control is studied using adaptive fault diagnosis observer (AFDO). Existence conditions for linear time-invariant system are first introduced to verify whether or not the adaptive observer for fault diagnosis exists. Then a novel fast adaptive fault estimation (FAFE) algorithm is proposed to enhance the performance of fault estimation. Using the on-line obtained fault information, the observer-based fault tolerant controller based on the separation property is designed to compensate for the loss of actuator effectiveness by stabilising the closed-loop system. Furthermore, an extension to a class of nonlinear systems is extensively investigated. Finally, simulation results are presented to illustrate the efficiency of the proposed techniques.
Keywords :
adaptive control; closed loop systems; fault diagnosis; fault tolerance; linear systems; nonlinear control systems; observers; stability; active fault-tolerant control; adaptive fault diagnosis observer; closed-loop system; dynamical system; fast adaptive fault estimation; linear time-invariant system; nonlinear system; separation property; stability;
fLanguage :
English
Journal_Title :
Control Theory & Applications, IET
Publisher :
iet
ISSN :
1751-8644
Type :
jour
DOI :
10.1049/iet-cta:20070283
Filename :
4787200
Link To Document :
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