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Titre : Methods for the study of stability of a periodically time-varying system Type de document : texte imprimé Auteurs : N. Sadaoui ; Univ. of Sussex, Éditeur scientifique ; D.P. Atherton, Directeur de thèse Année de publication : 1988 Importance : 125 f. Note générale : 01 disponible à la salle de recherche Langues : Anglais (eng) Catégories : Français - Anglais
PhysiqueTags : Time variyng systeme Stability Index. décimale : 530 Physique Permalink : index.php?lvl=notice_display&id=3355 Methods for the study of stability of a periodically time-varying system [texte imprimé] / N. Sadaoui ; Univ. of Sussex, Éditeur scientifique ; D.P. Atherton, Directeur de thèse . - 1988 . - 125 f.
01 disponible à la salle de recherche
Langues : Anglais (eng)
Catégories : Français - Anglais
PhysiqueTags : Time variyng systeme Stability Index. décimale : 530 Physique Permalink : index.php?lvl=notice_display&id=3355 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité SAD/1964 SAD/1964 Thèse Bibliothèque principale Thèses Disponible Contribution to robust fault-tolerant predictive control with constraints for hybrid systems. / Abdelmalek Zahaf
Titre : Contribution to robust fault-tolerant predictive control with constraints for hybrid systems. Type de document : texte imprimé Auteurs : Abdelmalek Zahaf, Auteur ; Sofiane Bououden, Directeur de thèse ; Mohamed Chemachema, Directeur de thèse Mention d'édition : April 11, 2021 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2021 Importance : 160 f. Format : 30 cm. Note générale : 1 copies imprimées disponibles
Langues : Anglais (eng) Catégories : Français - Anglais
ElectroniqueTags : Electronique: control systems Systèmes Hybride (HS) Commande Prédictive à Modèle (MPC) Commande Tolérante aux Défauts (FTC) La Commande Optimale Observateurs Inégalités matricielle linéaire (LMI) Stabilité Hybrid Systems (HS) Model predictive control (MPC) Fault Tolerant Control (FTC) Optimal Control Observers Linear matrix inequality (LMI) Stability الأنظمة الھجینة النموذج التحكم التنبؤي (MPC) التحكم المتسامح مع الأعطال لحل الأمثل مصفوفة عدم المساواة الخطیة LMI المراقبین و إستقرار الأنظمة Index. décimale : 621 Electronique Résumé :
In this dissertation, the main objective is to focus on proposing a new reliable control scheme to handle the undesirable associated inputs (faults/time –delay) of HS. In this regard, we raised two aspects to be studied in this dissertation: the hybrid control (HC) and the control of hybrid systems in the presence of faults and time-delay with constraints (HFTPC). The hybrid control design (HFTPC) is based on the interaction of two components: a robust model predictive control (RMPC) to cope with time delay as continuous dynamic and robust fault tolerant predictive control as discrete dynamic. The aim of this work is designing a robust optimal fault-tolerant predictive control (HFTPC) for a trajectory tracking, applied to a class of non-linear hybrid actuator systems subject to faults and time-delay. In fact, the introduction of time-delay and actuator faults into a hybrid system model results in a dynamic system converted to a strict feedback model. To improve the dynamic performances and decrease the conservatism, a dynamic mechanism of estimation is employed to estimate the actuators faults, in order to compute the optimal solution, while the performance of the hybrid system is preserved. The optimal solution of the HFTPC approach is computed online, by minimizing an upper bound of a specific cost function on infinite horizon, using min-max optimization method to derive necessary conditions in terms of LMIs; subject to the imposed constraints, faults and time-delays. However, an inspiring analysis is provided to improve the dynamics of a hybrid manipulator arm, which can be extended for some classes of hybrid systems, to decrease the computation burden. The state-space model has been reformulated by introducing the output tracking errors, in order to increase the hybrid controller degrees of freedom. Then, an optimal control strategy is designed to operate in the industrial robot arm with the desired position, with a compensation of the loss of efficiency or failure of the actuator in the presence of time-delays. To achieve this optimality, we have used the Lyapunov-Krasovskii function combined with an optimized cost function and observer error, to establish necessary paradigm to obtain a stable and less conservative conditions that is dependent delay-range in terms of LMIs, in order to enhance the feasibility and the stability of the closed loop system. The obtained results are improved and outperformed those obtained using the QP method. In addition, they have been compared with several existing works mentioned in this dissertation
Note de contenu :
Appendices.
Diplôme : Doctorat en sciences En ligne : ../theses/electronique/ZAH7783.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11615 Contribution to robust fault-tolerant predictive control with constraints for hybrid systems. [texte imprimé] / Abdelmalek Zahaf, Auteur ; Sofiane Bououden, Directeur de thèse ; Mohamed Chemachema, Directeur de thèse . - April 11, 2021 . - جامعة الإخوة منتوري قسنطينة, 2021 . - 160 f. ; 30 cm.
1 copies imprimées disponibles
Langues : Anglais (eng)
Catégories : Français - Anglais
ElectroniqueTags : Electronique: control systems Systèmes Hybride (HS) Commande Prédictive à Modèle (MPC) Commande Tolérante aux Défauts (FTC) La Commande Optimale Observateurs Inégalités matricielle linéaire (LMI) Stabilité Hybrid Systems (HS) Model predictive control (MPC) Fault Tolerant Control (FTC) Optimal Control Observers Linear matrix inequality (LMI) Stability الأنظمة الھجینة النموذج التحكم التنبؤي (MPC) التحكم المتسامح مع الأعطال لحل الأمثل مصفوفة عدم المساواة الخطیة LMI المراقبین و إستقرار الأنظمة Index. décimale : 621 Electronique Résumé :
In this dissertation, the main objective is to focus on proposing a new reliable control scheme to handle the undesirable associated inputs (faults/time –delay) of HS. In this regard, we raised two aspects to be studied in this dissertation: the hybrid control (HC) and the control of hybrid systems in the presence of faults and time-delay with constraints (HFTPC). The hybrid control design (HFTPC) is based on the interaction of two components: a robust model predictive control (RMPC) to cope with time delay as continuous dynamic and robust fault tolerant predictive control as discrete dynamic. The aim of this work is designing a robust optimal fault-tolerant predictive control (HFTPC) for a trajectory tracking, applied to a class of non-linear hybrid actuator systems subject to faults and time-delay. In fact, the introduction of time-delay and actuator faults into a hybrid system model results in a dynamic system converted to a strict feedback model. To improve the dynamic performances and decrease the conservatism, a dynamic mechanism of estimation is employed to estimate the actuators faults, in order to compute the optimal solution, while the performance of the hybrid system is preserved. The optimal solution of the HFTPC approach is computed online, by minimizing an upper bound of a specific cost function on infinite horizon, using min-max optimization method to derive necessary conditions in terms of LMIs; subject to the imposed constraints, faults and time-delays. However, an inspiring analysis is provided to improve the dynamics of a hybrid manipulator arm, which can be extended for some classes of hybrid systems, to decrease the computation burden. The state-space model has been reformulated by introducing the output tracking errors, in order to increase the hybrid controller degrees of freedom. Then, an optimal control strategy is designed to operate in the industrial robot arm with the desired position, with a compensation of the loss of efficiency or failure of the actuator in the presence of time-delays. To achieve this optimality, we have used the Lyapunov-Krasovskii function combined with an optimized cost function and observer error, to establish necessary paradigm to obtain a stable and less conservative conditions that is dependent delay-range in terms of LMIs, in order to enhance the feasibility and the stability of the closed loop system. The obtained results are improved and outperformed those obtained using the QP method. In addition, they have been compared with several existing works mentioned in this dissertation
Note de contenu :
Appendices.
Diplôme : Doctorat en sciences En ligne : ../theses/electronique/ZAH7783.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11615 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité ZAH/7783 ZAH/7783 Thèse Bibliothèque principale Thèses Disponible
Titre : Systèmes dynamiques à temps discrets et applications en biologie : Etudes statistiques et résultats numériques. Type de document : texte imprimé Auteurs : Kamel Djeddi, Auteur ; El-hadj Zéraoulia, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2021 Importance : 80 f. Format : 30 cm. Note générale : 1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
MathématiquesTags : Mathematiques:Mathématiques Appliquées Systèmes dynamiques discrets Chaos Théorème de Marotto tion de croissance tumorale Stabilité Bifurcation Discretes dynamics systems Marotto theorem Discretization Tumor growth model Stability الأنظمة الديناميكية المنفصلة الفوضى نظرية Marotto التقطيع-نموذج نمو الورم الاستقرار التشعب Index. décimale : 510 Mathématiques Résumé :
In this work, we are interested in the study of discrete-time dynamical systems. We are present the results of theoretical and numerical study of a discrete-time chaotic systems. We begin our study by plotting attractors obtained by numerical methods. We analyze the stability of fixed points. This work has three main parts. In the first part we five a study of the theory of chaos for topological dynamical systems defined by discrete maps for example the theorem of Li and Yorke in the case of dimension 1, and Marotto’s theorem in the case of the dimension n and Devaney’s theorem. The second part concerns the mathematical modeling and numerical simulation of tumor growth. We propose the model of De Pillis and Radunskaya. In the third part we present some methods used for discretization of dynamical systems, for example Euler method, Taylor method and Runge-Kutta method and we study the model of De Pillis and Radunskaya in discrete-time and with the method of discretization of Euler.
Note de contenu :
Annexes.
Diplôme : Doctorat en sciences En ligne : ../theses/math/DJE7738.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11571 Systèmes dynamiques à temps discrets et applications en biologie : Etudes statistiques et résultats numériques. [texte imprimé] / Kamel Djeddi, Auteur ; El-hadj Zéraoulia, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2021 . - 80 f. ; 30 cm.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
MathématiquesTags : Mathematiques:Mathématiques Appliquées Systèmes dynamiques discrets Chaos Théorème de Marotto tion de croissance tumorale Stabilité Bifurcation Discretes dynamics systems Marotto theorem Discretization Tumor growth model Stability الأنظمة الديناميكية المنفصلة الفوضى نظرية Marotto التقطيع-نموذج نمو الورم الاستقرار التشعب Index. décimale : 510 Mathématiques Résumé :
In this work, we are interested in the study of discrete-time dynamical systems. We are present the results of theoretical and numerical study of a discrete-time chaotic systems. We begin our study by plotting attractors obtained by numerical methods. We analyze the stability of fixed points. This work has three main parts. In the first part we five a study of the theory of chaos for topological dynamical systems defined by discrete maps for example the theorem of Li and Yorke in the case of dimension 1, and Marotto’s theorem in the case of the dimension n and Devaney’s theorem. The second part concerns the mathematical modeling and numerical simulation of tumor growth. We propose the model of De Pillis and Radunskaya. In the third part we present some methods used for discretization of dynamical systems, for example Euler method, Taylor method and Runge-Kutta method and we study the model of De Pillis and Radunskaya in discrete-time and with the method of discretization of Euler.
Note de contenu :
Annexes.
Diplôme : Doctorat en sciences En ligne : ../theses/math/DJE7738.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11571 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité DJE/7738 DJE/7738 Thèse Bibliothèque principale Thèses Disponible
Titre : Chaos, stabilité et coexistence dans les systèmes dynamiques. Type de document : texte imprimé Auteurs : Lotfi Meddour, Auteur ; Elhadj Zeraoulia, Directeur de thèse Mention d'édition : 12/11/2020 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2020 Importance : 84 f. Format : 30 cm. Note générale : 1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
MathématiquesTags : Mathématiques: Equations différentiels et ces applications Système de Lorenz transformation linéaire équivalence stabilité chaos Lorenz system linear scaling equivalence stability نظام لورينز التطبيق الخطي التكافؤ الاستقرار الفوضى Index. décimale : 510 Mathématiques Résumé :
The aim of the present work consists in a study of the equivalence of two chaotic dynamic systems and to examine and clarify the equivalence of the systems to the Lorenz system. For this purpose we had give several conditions for general forms of three-dimensional quadratic autonomous systems with two quadratic terms to be equivalent to the Lorenz system, as it has happened, for example, with the Chen and Lu systems that are particular cases of the Lorenz systme. By the results obtained in our work, we have distinguished three well-known systems
equivalent to the Lorenz system.
Diplôme : Doctorat en sciences En ligne : ../theses/math/MED7682.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11516 Chaos, stabilité et coexistence dans les systèmes dynamiques. [texte imprimé] / Lotfi Meddour, Auteur ; Elhadj Zeraoulia, Directeur de thèse . - 12/11/2020 . - جامعة الإخوة منتوري قسنطينة, 2020 . - 84 f. ; 30 cm.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
MathématiquesTags : Mathématiques: Equations différentiels et ces applications Système de Lorenz transformation linéaire équivalence stabilité chaos Lorenz system linear scaling equivalence stability نظام لورينز التطبيق الخطي التكافؤ الاستقرار الفوضى Index. décimale : 510 Mathématiques Résumé :
The aim of the present work consists in a study of the equivalence of two chaotic dynamic systems and to examine and clarify the equivalence of the systems to the Lorenz system. For this purpose we had give several conditions for general forms of three-dimensional quadratic autonomous systems with two quadratic terms to be equivalent to the Lorenz system, as it has happened, for example, with the Chen and Lu systems that are particular cases of the Lorenz systme. By the results obtained in our work, we have distinguished three well-known systems
equivalent to the Lorenz system.
Diplôme : Doctorat en sciences En ligne : ../theses/math/MED7682.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11516 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité MED/7682 MED/7682 Thèse Bibliothèque principale Thèses Disponible
Titre : Contribution a l’analyse des systemes d'ordre fractionnaire Type de document : texte imprimé Auteurs : Hassene Nezzari, Auteur ; Abdelfatah Charef, Directeur de thèse Editeur : constantine [Algérie] : Université Constantine 1 Année de publication : 2013 Importance : 140 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles Langues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : Equation différentielle d’ordre fractionnaire Fonction irrationnelle Fonction rationnelle
Implémentation analogique Stabilité Systèmes d’ordre fractionnaire Analog implementation Fractional order differential equation Fractional order system Irrational function Rational function Stability إنجاز تماثلي ثبات دالة غير منتظمة دالة منتظمة معادلات تفاضلية ذات الدرجة الجزئية نظام ذوأس
جزئيIndex. décimale : 621 Electronique Résumé : Fractional order systems have received a considerable interest in numerous domains of applied sciences and engineering. These systems are generally described by fractional order differential equations. In the frequency domain, they are represented by irrational transfer
functions. Because of these irrational functions, fractional order systems have been marginally studied. Since they do not have exact analytical solutions, digital and approximation techniques are widely used for their resolution, analysis and implementation.
In this thesis resolution, analog implementation and analysis techniques of fundamental fractional order systems based on rational function approximations of their irrational transfer functions are presented. Derivation and analysis of the frequency and temporal characteristics
have also been done. To show the efficiency and exactitude of the proposed methods, illustrative examples have been presented. The obtained simulation results were satisfactory. They have been compared to some of the recent resolution methods in the literature.Comparisons of the obtained characteristics with those of a regular second system have been also done.Diplôme : Doctorat en sciences En ligne : ../theses/electronique/NEZ6438.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9470 Contribution a l’analyse des systemes d'ordre fractionnaire [texte imprimé] / Hassene Nezzari, Auteur ; Abdelfatah Charef, Directeur de thèse . - constantine [Algérie] : Université Constantine 1, 2013 . - 140 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : Equation différentielle d’ordre fractionnaire Fonction irrationnelle Fonction rationnelle
Implémentation analogique Stabilité Systèmes d’ordre fractionnaire Analog implementation Fractional order differential equation Fractional order system Irrational function Rational function Stability إنجاز تماثلي ثبات دالة غير منتظمة دالة منتظمة معادلات تفاضلية ذات الدرجة الجزئية نظام ذوأس
جزئيIndex. décimale : 621 Electronique Résumé : Fractional order systems have received a considerable interest in numerous domains of applied sciences and engineering. These systems are generally described by fractional order differential equations. In the frequency domain, they are represented by irrational transfer
functions. Because of these irrational functions, fractional order systems have been marginally studied. Since they do not have exact analytical solutions, digital and approximation techniques are widely used for their resolution, analysis and implementation.
In this thesis resolution, analog implementation and analysis techniques of fundamental fractional order systems based on rational function approximations of their irrational transfer functions are presented. Derivation and analysis of the frequency and temporal characteristics
have also been done. To show the efficiency and exactitude of the proposed methods, illustrative examples have been presented. The obtained simulation results were satisfactory. They have been compared to some of the recent resolution methods in the literature.Comparisons of the obtained characteristics with those of a regular second system have been also done.Diplôme : Doctorat en sciences En ligne : ../theses/electronique/NEZ6438.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9470 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité NEZ/6438 NEZ/6438 Thèse Bibliothèque principale Thèses Disponible Documents numériques
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