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Partager le résultat de cette recherche Interroger des sources externesContribution à l’implémentation de nouvelles approches de synchronisation hybride des systèmes chaotiques à paramètres incertains. / Zakaria Driss
Titre : Contribution à l’implémentation de nouvelles approches de synchronisation hybride des systèmes chaotiques à paramètres incertains. Type de document : texte imprimé Auteurs : Zakaria Driss, Auteur ; Noura Mansouri, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 129 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : systèmes chaotiques synchronisation Synchronisation hybride GPC Automatique Traitement du signal Index. décimale : 621 Electronique Résumé : The aim of the thesis is to consider the performance of some control methods towards the
problem of hybrid synchronization of uncertain chaotic systems. These systems are
interesting due to the sensitive dependence on initial conditions or what is called the butterfly
effect; this feature makes chaotic systems exhibit random behavior. Therefore, the
synchronization of chaotic systems with uncertain parameters is an attractive problem,
especially in the field of secure communication, that has been intensively studied in the last
two decades. The problem of uncertainties on the parameters, in the field of nonlinear control
systems, has been solved especially when advanced control methods are used. However, the
effect of synchronization of two chaotic systems with uncertain parameters and hybrid
synchronization type on some advanced control method is still questionable. The thesis is
composed of three main points, each of them dealing with the studied problem from a
different aspect.
In the first point, we considered the performance of adaptive synchronization in which selftuning adaptive control and active control method are used. This approach has been used
intensively to solve the studied problem, but many problems have been reported, and one of
the problems is the wrong estimation of the unknown parameters. This problem occurs when
two identical or partially identical chaotic systems are synchronized in which the
synchronization prevents the adaptation laws to estimate the true values of the unknown
parameters. This problem is considered in chapter 2 of the thesis in which we explained the
problem, gave the proposed solutions, and the contribution.
In the second point, predictive control, particularly generalized predictive control (GPC), has
been considered. This approach is sort of complex control method in which the accuracy of
the model plays a vital role during the control process. Therefore, we examined, in chapter 3,
the performance of GPC towards the studied problem. This chapter consists of two parts. Part
one focuses on GPC based on fuzzy PID controllers in which we discussed the roll of the
linear model. Part two investigates the performance of GPC based on a neural network model
(NNGPC).
In the first point and the second point, the synchronization type used is complete
synchronization. Therefore, in the third point (chapter 4), we addressed the problem of
hybrid synchronization of uncertain chaotic systems in which we investigated the
performance of the studied control methods.
In general, the effect of synchronization or hybrid synchronization of uncertain chaotic
systems on some advanced control methods is partial. The field of chaos synchronization
using feedback control is an independent field of research, but the performance of studied
methods may not be satisfying when the field of secure communication is involved.Diplôme : Doctorat En ligne : ../theses/electronique/DRI7102.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10499 Contribution à l’implémentation de nouvelles approches de synchronisation hybride des systèmes chaotiques à paramètres incertains. [texte imprimé] / Zakaria Driss, Auteur ; Noura Mansouri, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2017 . - 129 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : systèmes chaotiques synchronisation Synchronisation hybride GPC Automatique Traitement du signal Index. décimale : 621 Electronique Résumé : The aim of the thesis is to consider the performance of some control methods towards the
problem of hybrid synchronization of uncertain chaotic systems. These systems are
interesting due to the sensitive dependence on initial conditions or what is called the butterfly
effect; this feature makes chaotic systems exhibit random behavior. Therefore, the
synchronization of chaotic systems with uncertain parameters is an attractive problem,
especially in the field of secure communication, that has been intensively studied in the last
two decades. The problem of uncertainties on the parameters, in the field of nonlinear control
systems, has been solved especially when advanced control methods are used. However, the
effect of synchronization of two chaotic systems with uncertain parameters and hybrid
synchronization type on some advanced control method is still questionable. The thesis is
composed of three main points, each of them dealing with the studied problem from a
different aspect.
In the first point, we considered the performance of adaptive synchronization in which selftuning adaptive control and active control method are used. This approach has been used
intensively to solve the studied problem, but many problems have been reported, and one of
the problems is the wrong estimation of the unknown parameters. This problem occurs when
two identical or partially identical chaotic systems are synchronized in which the
synchronization prevents the adaptation laws to estimate the true values of the unknown
parameters. This problem is considered in chapter 2 of the thesis in which we explained the
problem, gave the proposed solutions, and the contribution.
In the second point, predictive control, particularly generalized predictive control (GPC), has
been considered. This approach is sort of complex control method in which the accuracy of
the model plays a vital role during the control process. Therefore, we examined, in chapter 3,
the performance of GPC towards the studied problem. This chapter consists of two parts. Part
one focuses on GPC based on fuzzy PID controllers in which we discussed the roll of the
linear model. Part two investigates the performance of GPC based on a neural network model
(NNGPC).
In the first point and the second point, the synchronization type used is complete
synchronization. Therefore, in the third point (chapter 4), we addressed the problem of
hybrid synchronization of uncertain chaotic systems in which we investigated the
performance of the studied control methods.
In general, the effect of synchronization or hybrid synchronization of uncertain chaotic
systems on some advanced control methods is partial. The field of chaos synchronization
using feedback control is an independent field of research, but the performance of studied
methods may not be satisfying when the field of secure communication is involved.Diplôme : Doctorat En ligne : ../theses/electronique/DRI7102.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10499 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité DRI/7102 DRI/7102 Thèse Bibliothèque principale Thèses Disponible
Titre : Systèmes dynamiques et chaos : Différentes méthodes de contrôle et de synchronisation Type de document : texte imprimé Auteurs : Rabiaa Ouahabi, Auteur ; Nasr-Eddine Hamri, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 159 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
MathématiquesTags : Systèmes chaotiques Contrôle adaptatif Synchronisation projective Chaotic systems Adaptive control Projective synchronization ????? ?????? ?????? ??????? ??????? ???????? ?? ????? ?????? Index. décimale : 510 Mathématiques Résumé : In this thesis we have addressed the problem of the control and the synchronization of the dynamic chaotic systems.
This thesis is broken up into four parts. In the first part of the thesis we have given the definitions and characteristics of the dynamic and chaotic systems, leading to a definition that is going to allow to the scientists an understanding and an application more increased of the chaotic systems, one finds fundamental theoretical concepts for the analysis of the behavior and different classic methods of control of these systems.
In the second part, we discussed chaos control problems, the mathematical formulation of the control of chaotic processes. We have also proposed in this part the most reliable and well-known methods of controlling chaotic processes : the OGY method, the TDFC method, and the non-linear adaptive control method, these methods aim to improve the suppression of chaos and drive the system to converge to the desired periodic orbit or
stabilize at its fixed point.
In the last chapter of this thesis the problem of synchronization of chaotic systems was addressed, we have presented several synchronization schemes, two techniques have been presented to achieve identical synchronization where two coupled chaotic systems exhibit identical oscillations : Pecora and Carroll technique, and the second technique is based on a linear coupling.
Subsequently, a generalized synchronization method was presented. This approach is an extension of the previous phenomenon involving the presence of functional relationships between the two coupled systems.
Finally, An adaptive control scheme is designed for the modified projective synchronization (AMPS) of two chaotic systems based on Lyapunov stability theorem, in this method the drive and response systems could be synchronized up to a constant scaling matrix, a numerical examples are given to demonstrate the effectiveness of the proposed
method.
This latter method is important because it includes complete synchronization, antisynchronization and projective synchronization.
The advantage of this method is that it is applied for the synchronization of identical systems, different systems, hyperchaotic systems and uncertain systems.
Diplôme : Doctorat en sciences En ligne : ../theses/math/OUA7248.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10840 Systèmes dynamiques et chaos : Différentes méthodes de contrôle et de synchronisation [texte imprimé] / Rabiaa Ouahabi, Auteur ; Nasr-Eddine Hamri, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2018 . - 159 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
MathématiquesTags : Systèmes chaotiques Contrôle adaptatif Synchronisation projective Chaotic systems Adaptive control Projective synchronization ????? ?????? ?????? ??????? ??????? ???????? ?? ????? ?????? Index. décimale : 510 Mathématiques Résumé : In this thesis we have addressed the problem of the control and the synchronization of the dynamic chaotic systems.
This thesis is broken up into four parts. In the first part of the thesis we have given the definitions and characteristics of the dynamic and chaotic systems, leading to a definition that is going to allow to the scientists an understanding and an application more increased of the chaotic systems, one finds fundamental theoretical concepts for the analysis of the behavior and different classic methods of control of these systems.
In the second part, we discussed chaos control problems, the mathematical formulation of the control of chaotic processes. We have also proposed in this part the most reliable and well-known methods of controlling chaotic processes : the OGY method, the TDFC method, and the non-linear adaptive control method, these methods aim to improve the suppression of chaos and drive the system to converge to the desired periodic orbit or
stabilize at its fixed point.
In the last chapter of this thesis the problem of synchronization of chaotic systems was addressed, we have presented several synchronization schemes, two techniques have been presented to achieve identical synchronization where two coupled chaotic systems exhibit identical oscillations : Pecora and Carroll technique, and the second technique is based on a linear coupling.
Subsequently, a generalized synchronization method was presented. This approach is an extension of the previous phenomenon involving the presence of functional relationships between the two coupled systems.
Finally, An adaptive control scheme is designed for the modified projective synchronization (AMPS) of two chaotic systems based on Lyapunov stability theorem, in this method the drive and response systems could be synchronized up to a constant scaling matrix, a numerical examples are given to demonstrate the effectiveness of the proposed
method.
This latter method is important because it includes complete synchronization, antisynchronization and projective synchronization.
The advantage of this method is that it is applied for the synchronization of identical systems, different systems, hyperchaotic systems and uncertain systems.
Diplôme : Doctorat en sciences En ligne : ../theses/math/OUA7248.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10840 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité OUA/7248 OUA/7248 Thèse Bibliothèque principale Thèses Disponible
Titre : Controle et synchronisation des systèmes chaotiques Type de document : texte imprimé Auteurs : Abdeldjalil Naceri ; Université Mentouri, Editeur scientifique ; N. Mansouri, Directeur de thèse Année de publication : 2005 Importance : 84 f. Note générale : 01 Disponible à la salle de recherche 02 Disponibles au magazin de la bibliothèque centrale
01 DisquetteLangues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : Synchronisation Controle Systèmes chaotiques Index. décimale : 621 Electronique Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=2267 Controle et synchronisation des systèmes chaotiques [texte imprimé] / Abdeldjalil Naceri ; Université Mentouri, Editeur scientifique ; N. Mansouri, Directeur de thèse . - 2005 . - 84 f.
01 Disponible à la salle de recherche 02 Disponibles au magazin de la bibliothèque centrale
01 Disquette
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : Synchronisation Controle Systèmes chaotiques Index. décimale : 621 Electronique Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=2267 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité NAC/4381 NAC/4381 Thèse Bibliothèque principale Thèses Disponible
