208documents trouvés
Optimization of fuzzy controllers by neural networks and hierarchical genetic algorithms
O.GUENOUNOU, A.BELMEHDI, B.DAHHOU
DISCO
Manifestation avec acte : European Control Conference (ECC'07), Kos (Grèce), 2-5 Juillet 2007, pp.196-203 , N° 06803
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110746Fault isolation for nonlinear dynamic systems based on parameter intervals
Z.LI, B.DAHHOU
DISCO
Revue Scientifique : International Journal of Systems Science, Vol.38, N°7, pp.531-547, Juillet 2007 , N° 05022
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Abstract
The study of fault detection and isolation for nonlinear dynamic systems has been receiving significant attention. Up to now few literatures pay attention to the speed of fault isolation. However, it is a crucial problem for the design of the fault-tolerant control (FTC) of the nonlinear dynamic systems. In this article a new method of fault isolation for nonlinear dynamic systems is proposed. The method is based on the monotonous characteristic of the prediction error of the observer with respect to singular parameter difference between the system and the observer. The proposed method has the advantage of the methods based on adaptive observers that fits a large kind of nonlinear dynamic systems, while it does not have their disadvantage that take a long time to identify the system parameter: Therefore the fault isolation of this method is quicker. The performance of the method is illustrated by simulation results using a nonlinear dynamic model of an alcoholic fermentation process.
Actuator fault isolation strategy to a waste water treatment process
D.FRAGKOULIS, G.ROUX, B.DAHHOU
DISCO
Manifestation avec acte : Conference on Systems and Control (CSC 2007), Marrakech (Maroc), 16-18 Mai 2007, 6p. , N° 07191
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Abstract
In this paper we propose a new actuator fault isolation strategy for a waste water treatment process. The method is based on the creation of a bank of nonlinear observers where each observer isolates the fault of each actuator. The advantage of the method is that we can detect and isolate single and multiple faults. The validity of the method will be tested to waste water treatment process.
A new neuro fuzzy controller structure for nonlinear systems
O.GUENOUNOU, A.BELMEHDI, B.DAHHOU
DISCO
Manifestation avec acte : Conference on Systems Analysis & Automatic Control (SAC'07), Hammamet (Tunisie), 19-22 Mars 2007, 7p. , N° 06800
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109521Diagnosis of multi faults in fermentation bioprocess by structural approach
N.BELKHERCHI, A.BELMEHDI, B.DAHHOU
DISCO, LT2I
Manifestation avec acte : International Conference on Systems Analysis and Automatic Control, Hammamet (Tunisie), 19-22 Mars 2007, 5p. , N° 07703
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Mots-Clés / Keywords
Structural analysis; Diagnosis; Bioprocess; Fault detection; Fault isolation;
Modelling, software sensors, control and supervision of fermentation processes
B.DAHHOU, G.ROUX, Y.NAKKABI
DISCO, INSAT-DGBA
Ouvrage (contribution) : Fermentation microbiology and biotechnology, Eds. EMT.El-Mansi, CFA.Bryce, AL.Demain, AR.Allman, CRC Taylor & Francis, N°ISBN 0-8493-5334-3, 2007, Chapitre 14, pp.493-522 , N° 06344
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109520Optimisation de contrôleurs flous par algorithmes génétiques hiérarchisés. Application à la commande d'un bioprocédé
O.GUENOUNOU, A.BELMEHDI, B.DAHHOU
DISCO
Manifestation avec acte : 7ème Conférence Internationale des Sciences et Techniques del'Automatique (STA'2006), Hammamet (Tunisie), 17-19 Décembre 2006, 10p. , N° 06802
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109040Parameter intervals used for fault isolation in nonlinear dynamic systems
Z.LI, B.DAHHOU
DISCO
Revue Scientifique : International Journal of Modelling, Identification and Control, Vol.1, N°3, pp.215-229, 2006 , N° 06034
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Abstract
Parameter intervals can be used to solve fault isolation problems. The parameter interval-based fault isolation method has good speed and can provide an estimate of the faulty parameter. In this paper, a parameter interval-based fault isolation method for non-linear dynamic systems is presented.
Illustration of an interval approach for fault isolation and identification
D.FRAGKOULIS, G.ROUX, B.DAHHOU
DISCO
Rapport LAAS N°06801, Novembre 2006, 8p.
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108586A fault isolation method for nonlinear dynamic systems based on monotonous observers
Z.LI, B.DAHHOU, G.ROUX
DISCO
Manifestation avec acte : Multiconference on "Computational Engineering in Systems Applications" (CESA'2006), Beijing (Chine), 4-6 Octobre 2006, 8p. , N° 06343
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