DocumentCode :
2554147
Title :
Optimal fault diagnosis based on duality principle for linear systems
Author :
Li, Juan
Author_Institution :
Coll. of Mech. & Electr. Eng., Qingdao Agric. Univ., Qingdao
fYear :
2008
fDate :
2-4 July 2008
Firstpage :
573
Lastpage :
577
Abstract :
The note studies the fault diagnosis problem in the optimal meaning for linear systems when the actuator faults and the sensor faults happen. An optimal fault diagnosis approach is proposed based on duality principle. This scheme first translates the fault states into the states of an augmented system. Based on duality principle, the design problem of the observer for fault diagnosis is translated into the state feedback design problem of the duality system of the observation error equation. Then the design of the optimal fault diagnoser is translated into the design of the equivalent optimal state feedback control of error system. By constructing the reduced-order fault diagnoser, the real-time fault diagnosis is realized on-line, and the quadratic performance index is catered. Simulation example demonstrates the feasibility and validity of the proposed scheme.
Keywords :
duality (mathematics); fault diagnosis; linear systems; optimal control; performance index; sensors; state feedback; actuator faults; duality principle; linear systems; observation error equation; optimal fault diagnosis; optimal state feedback control; quadratic performance index; sensor faults; Control systems; Equations; Error correction; Fault diagnosis; Hydraulic actuators; Linear systems; Optimal control; Performance analysis; Sensor systems; State feedback; Duality Principle; Fault diagnosis; Linear Systems; Optimal Control; state Observer;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Control and Decision Conference, 2008. CCDC 2008. Chinese
Conference_Location :
Yantai, Shandong
Print_ISBN :
978-1-4244-1733-9
Electronic_ISBN :
978-1-4244-1734-6
Type :
conf
DOI :
10.1109/CCDC.2008.4597377
Filename :
4597377
Link To Document :
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