Dissertationen zum Thema „Commande des systèmes de direction“
Geben Sie eine Quelle nach APA, MLA, Chicago, Harvard und anderen Zitierweisen an
Machen Sie sich mit Top-50 Dissertationen für die Forschung zum Thema "Commande des systèmes de direction" bekannt.
Neben jedem Werk im Literaturverzeichnis ist die Option "Zur Bibliographie hinzufügen" verfügbar. Nutzen Sie sie, wird Ihre bibliographische Angabe des gewählten Werkes nach der nötigen Zitierweise (APA, MLA, Harvard, Chicago, Vancouver usw.) automatisch gestaltet.
Sie können auch den vollen Text der wissenschaftlichen Publikation im PDF-Format herunterladen und eine Online-Annotation der Arbeit lesen, wenn die relevanten Parameter in den Metadaten verfügbar sind.
Sehen Sie die Dissertationen für verschiedene Spezialgebieten durch und erstellen Sie Ihre Bibliographie auf korrekte Weise.
Marouf, Alaa. „Contribution à la Commande du Système de Direction Assistée Electrique“. Thesis, Valenciennes, 2013. http://www.theses.fr/2013VALE0012.
Der volle Inhalt der QuelleThe control of Electric Power Assisted Steering (EPAS) system is a challengingproblem due to the multiple objectives and the need of several pieces of information to implement the control. The control objectives are to generate assist torque with fast responses to driver’s torque commands, insure system stability, attenuate vibrations, transmit the road information to the driver, and improve the steering wheel returnability and free control performance. The control must also be robust against modeling errors and parameter uncertainties. In addition, several pieces of information are required to implement the control, such as steering wheel angle, motor velocity, driver torque and road reaction torque
Coudon, Julien. „Algorithmes de commande pour le pilotage d'une direction découplée“. Phd thesis, Grenoble INPG, 2007. http://www.theses.fr/2007INPG0014.
Der volle Inhalt der QuelleThis dissertation focuses on the problem of the control of a Steer-Sy Wire System. The main idea is to control the two subsystems the steering wheel one and the front wheels one) which composed the steering system in order to : give to the driver, thanks to the steering wheel, relevant information about the dynamic status of his vehicle ; provide comfortable driving feelings ; improve the vehicle dynamics. This study presents a reference model which describes the desired behavior of a steering system in interaction with a vehicle. This model accounts for force reflection and vehicle dynamics interactions. Two control law strategies are proposed to reproduce the behavior of the reference model on the steering system. Experimental results on prototype are exposed
Coudon, Julien. „Algorithmes de Commande Pour Le Pilotage d'Une Direction Découplée“. Phd thesis, Grenoble INPG, 2007. http://tel.archives-ouvertes.fr/tel-00181462.
Der volle Inhalt der QuelleDeux méthodes de commande sont proposées afin de reproduire le comportement du modèle de référence sur un système de direction découplée. Des essais sur prototype ont été réalisés et des résultats expérimentaux sont proposés.
Ciarla, Valentina. „Commande d'un système de Puissance électrique pour personne âgée et/ou handicapée“. Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00995299.
Der volle Inhalt der QuellePoussot-Vassal, Charles. „Commande Robuste LPV Multivariable de Châssis Automobile“. Phd thesis, Grenoble INPG, 2008. http://tel.archives-ouvertes.fr/tel-00351472.
Der volle Inhalt der QuellePoussot-Vassal, Charles. „Commande robuste LPV multivariable de châssis automobile“. Phd thesis, Grenoble INPG, 2008. http://www.theses.fr/2008INPG0171.
Der volle Inhalt der QuelleIn this thesis, the automotive global chassis control problem is treated. The objective is to develop methodologies to control the different vehicle actuators (suspension, braking and steering systems) to enhance comfort and safety, and, to control the ground vehicle dynamics. Since it implies many different and nonlinear phenomena and constrained actuators, this problem turns to be very complex to solve. The tools and methods used are inspired from the recent developments in automatic control, and especially from the one from the robust control community applied to Linear Parameter Varying (LPV) systems. In this framework, we focus on the modeling, the analysis and the control of automotive systems as well as robust control for LPV systems, using the Linear Matrix Inequality (LMI) tools. The main results concern the development of a new semi-active suspension controller and an adaptive global chassis control using the robust LPV approach
Ciarla, Valentina. „Commande d'un système de puissance électrique pour de personne à mobilité réduite“. Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00950866.
Der volle Inhalt der QuelleGhesquiers, Philippe. „Structure spatiale de commandabilité, placement de directions propres et découplage par blocs des systèmes linéaires“. Toulouse, ENSAE, 1990. http://www.theses.fr/1990ESAE0006.
Der volle Inhalt der QuelleDiab, Ali. „Stability analysis and control design for time-delay systems with applications to automotive steering systems“. Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPAST057.
Der volle Inhalt der QuelleSteering assistance helps the driver to maneuver the vehicle by reducing the steering effort. In the case of electric power steering and steer-by-wire, the assistance system is composed of electrical drives placed at the rack pinion (allowing the wheels to move) and at the steering wheel (providing the driver a feeling of the forces acting on the wheels). These architectures introduce, however, delays in the feedback loops of the system. To ensure its stability in the presence of delays, one can reduce the assist gain or increase the damping of the steering wheel, but this negatively impacts the system's performance and degrades the force feedback returned to the driver. In order to counter this limitation, we design and analyze control laws for steering systems that increase (compared to current strategies) the delay margin of the system. We use a frequency-domain approach to analyze the constraints imposed by the stability of the feedback system generating the steering wheel torque. Our algorithms rely on classical proportional-derivative control architectures, including torque maps and filters. The simplicity of the proposed methods allows an analytical computation of the delay margin. In addition, to make our results more general (for example, for nonlinear torque maps), we develop time-domain techniques to analyze the stability of linear time-delay systems using Lyapunov-Krasovskii functionals. We formulate a projection-based method allowing general sets of functions to parameterize Lyapunov-Krasovskii functionals. We discuss the main assumptions considered in our formulation and establish connections between the existing approaches for the stability analysis of time-delay systems based on semidefinite programming, namely the method based on the use of integral inequalities and the method based on sum-of-squares programming. Finally, the obtained results are also applied to the test case of steering systems
Di, Martino Marc. „Commande optimale prédictive et commande adaptative : application à la commande d'un télépointeur“. Nice, 1985. http://www.theses.fr/1985NICE4062.
Der volle Inhalt der QuelleCébron, Benoît. „Commande de systèmes dynamiques hybrides“. Angers, 2000. http://www.theses.fr/2000ANGE0022.
Der volle Inhalt der QuelleA dynamic system is said to be hybrid (sdh) when discrete and continuous variables interact. The development of specific representation, analysis and control methods is required to take into account the complexity of these systems. A classification of sdhs is proposed according to the types of hybrid phenomena considered: controlled or autonomous model switching, controlled or autonomous state vector jumps. Control problems are then posed and analysed for each class presented. The search for an optimal control is posed as a problem of minimisation of a criterion of deviation between a calculated trajectory and a desired trajectory. A descent method is applied in each case; it uses the expression of the gradient of the criterion. The latter is calculated from the solution of an adjoint system. We show how to calculate this adjoint system by adapting the general principles of the calculation of variations to the cases considered. This is how discontinuities appear on the adjoint state, for which explicit expressions are given. These discontinuities can be found in the calculated control. The minimization of the criterion is first performed without constraints and then with bound constraints on the control and on its derivative, by implementing the uzawa method. The state feedback control problem is addressed for the classes of sdh with controlled and autonomous model switching. This leads to the solution of riccati equations. Each case studied is illustrated by a numerical implementation which allows to judge the efficiency of the proposed method, in terms of accuracy and computation time, and to conclude that it is possible to control sdhs by these methods
Chombart, Anne. „Commande supervisée de systèmes hybrides“. Grenoble INPG, 1997. http://www.theses.fr/1997INPG0170.
Der volle Inhalt der QuelleNoura, Hassan. „Contribution à la commande des systèmes : diagnostic et commande des systèmes soumis à des défauts“. Nancy 1, 1993. http://www.theses.fr/1993NAN10208.
Der volle Inhalt der QuellePellanda, Paulo César. „Commande de systèmes instationnaires : séquencement de compensateurs et commande LPV“. Toulouse, ENSAE, 2001. http://www.theses.fr/2001ESAE0005.
Der volle Inhalt der QuelleAmet, Leonardo. „Commande des systèmes à commutation : applications aux systèmes électriques“. Thesis, Cergy-Pontoise, 2014. http://www.theses.fr/2014CERG0720/document.
Der volle Inhalt der QuelleIn this thesis , conducted in the context of a grant CIFRE between laboratory ECS-Lab and the company GS Maintenance, we focused on the control and observation of electrical systems, particularly multicellular converter series and the series DC motor.The floating voltages of the multicell topology need to be balanced to specific values. PWM control techniques provide such a balance but favor the slow dynamics. Moreover, if the numbers of cells is not prime, there exist duty-cycles which could destabilize the converter. To overcome these drawbacks, we propose direct control strategies based on sliding mode techniques for 2 and 3-cell converters. These are simple, allow fast dynamics, and can be easily extended to any number of cell with little overhead. They have been tested in simulation and experimentally via a real-time dSpace board on a 2 and 3-cell converter develloped during this thesis at ECS-Lab. It is important to emphasize that an industrial version of the converter has been manufactured at GS Maintenance and sold to Qatar University.Moreover, in the context of the appication of multicell converters, a Zig-Zag sliding mode control law has been proposed to overcome quantization and saturation problems found in real actuators.The second part of this work adresses the synthetization of an super-twistign observer/estimator scheme to estimate the speed of a sensorless DC series motor. The proposed observation strategy is dedicated to an industrial application in the context of oil drilling. It provides a solution to the problem of observation generated by operating at zero or low current. This strategy has been tested on an experimental bench developed in this thesis within GS Maintenance
Vlad, Cristina. „Commande prédictive des systèmes hybrides et application à la commande de systèmes en électronique de puissance“. Phd thesis, Supélec, 2013. http://tel.archives-ouvertes.fr/tel-00817487.
Der volle Inhalt der QuelleFarkh, Rihem. „COMMANDE PID DES SYSTÈMES À RETARD“. Phd thesis, École Nationale d'Ingénieurs de Tunis, 2011. http://tel.archives-ouvertes.fr/tel-00587529.
Der volle Inhalt der QuelleLin-Shi, Xuefang. „Commande des systèmes de conversion d'énergie“. Habilitation à diriger des recherches, INSA de Lyon, 2007. http://tel.archives-ouvertes.fr/tel-00182507.
Der volle Inhalt der QuelleLa première partie dresse un bilan de mon parcours professionnel, de mes activités de recherche, de mes activités d'encadrement, de ma participation à l'administration et de mes activités d'enseignement.
La seconde partie est consacrée à une présentation thématique des travaux menés dans les trois axes de recherche suivants : la commande pour des entraînements électriques, la commande des systèmes dynamiques hybrides et la commande des convertisseurs de puissance à découpage.
Ma contribution scientifique à travers des publications et des communications sera listée dans la troisième partie.
Teodorescu, Catalin Stefan. „Commande de systèmes d'isolation antisismique mixte“. Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00904280.
Der volle Inhalt der QuelleBoisseau, Bruno. „Commande événementielle : applications aux systèmes robotiques“. Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAT037/document.
Der volle Inhalt der QuelleControl system theory has first been built for analog controllers. In this context, it was relevant to use a continuous framework to design a control feedback function. Nowadays, digital technologies are supplanting analog solutions due to several advantages (cost, noise, resistance, integration...). Signal is held constant between periodic triggers given by a digital clock.Event-based (or event-triggered) control aims to improve the periodic sampling scheme by proposing a method in which updates are triggered by an event function.In this thesis new event-based designs are detailled and tested on real-time systems.The most original contribution of this thesis is the use of an event-triggered design for a problem of collision avoidance between a quadrotor and a known environment
El, Assoudi Abdellatif. „Observation et commande des systèmes mécaniques“. Lyon 1, 1994. http://www.theses.fr/1994LYO10039.
Der volle Inhalt der QuelleHolderbaum, William. „Commande des systèmes à entrées booléennes“. Lille 1, 1999. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/1999/50376-1999-123.pdf.
Der volle Inhalt der QuelleTebbikh, Hicham. „Structure et commande des systèmes polynomiaux“. Grenoble INPG, 1989. http://www.theses.fr/1989INPG0122.
Der volle Inhalt der QuelleGhamgui, Mariem. „Analyse et commande des systèmes multidimensionnels“. Thesis, Poitiers, 2013. http://www.theses.fr/2013POIT2275.
Der volle Inhalt der QuelleThis thesis deals with the analysis and the control of multidimensional systems. These systems can be defined as the classe of systems where the information is propagated in several independent direction. For instance, a 2D system with a dimension corresponding to space and, the other one to time. The contributions presented in this work focuses, on one hand, on the control of 2D discrete or continuous systems with constant or variable delays and on the other hand, on the synthesis of robust state feedback controllers for nD hybrid uncertain systems including parameter uncertainties complying with an implicit linear fractional representation (ILFR). Two approaches are used. One is based on the characteristic polynomial and the other on Lyapunov techniques. Sufficient conditions for stability and stabilization are established for 2D delayed discrete or continuous systems using Lyapunov approach. Conditions to insure both stability and a prescribed H∞ performance level are given for this class of systems. Then, a general framework for the establishment of computationally tractable LMI conditions to analyse the stability of nD hybrid systems is proposed. Robust stability and stabilization conditions are then established for nD hybrid uncertain systems. The uncertainties comply with an (ILFR) description
Estrada, Manzo Víctor. „Estimation et commande des systèmes descripteurs“. Thesis, Valenciennes, 2015. http://www.theses.fr/2015VALE0032/document.
Der volle Inhalt der QuelleThis thesis addresses the estimation and control for nonlinear descriptor systems. The developments are focused on a family of nonlinear descriptor models with a full-rank descriptor matrix. The proposed approaches are based on a Takagi-Sugeno (TS) descriptor representation of a given nonlinear descriptor model. This type of TS models is a generalization of the standard TS ones. One of the mains goals is to obtain conditions in terms of linear matrix inequalities (LMIs). In the existing literature, the observer design for TS descriptor models has led to bilinear matrix inequality (BMI) conditions. In addition, to the best of our knowledge, there are no results in the literature on controller/observer design for discrete-time TS descriptor models (with a non-constant and invertible descriptor matrix).Three problems have been addressed: state feedback controller design, observer design, and static output feedback controller design. LMI conditions have been obtained for both continuous and discrete-time TS descriptor models. In the continuous-time case, relaxed LMI conditions for the state feedback controller design have been achieved via parameterdependent LMI conditions. For the observer design, pure LMI conditions have been developed by using a different extended estimation error. For the static output feedback controller, LMI constraints can be obtained once an auxiliary matrix is fixed. In the discretetime case, results in the LMI form are provided for state/output feedback controller design and observer design; thus filling the gap in the literature. Several examples have been included to illustrate the applicability of the obtained results and the importance of keeping the original descriptor structure instead of computing a standard state-space
Olaru, Sorin. „La commande des systèmes dynamiques sous contraintes Interaction optimisation-géométrie-commande“. Habilitation à diriger des recherches, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00641658.
Der volle Inhalt der QuelleCazaurang, Franck. „COMMANDE ROBUSTE DES SYSTÈMES PLATSAPPLICATION À LA COMMANDE D' UNE MACHINE SYNCHRONE“. Phd thesis, Université Sciences et Technologies - Bordeaux I, 1997. http://tel.archives-ouvertes.fr/tel-00012110.
Der volle Inhalt der QuelleCazaurang, Franck. „Commande robuste des systèmes plats : application à la commande d'une machine synchrone“. Bordeaux 1, 1997. http://www.theses.fr/1997BOR10644.
Der volle Inhalt der QuelleBidart, Damien. „Commande Coopérative des Systèmes Monoconvertisseurs Multimachines Synchrones“. Phd thesis, Institut National Polytechnique de Toulouse - INPT, 2011. http://tel.archives-ouvertes.fr/tel-00662181.
Der volle Inhalt der QuelleRiedinger, Pierre. „Contribution à la commande des systèmes complexes“. Habilitation à diriger des recherches, Institut National Polytechnique de Lorraine - INPL, 2010. http://tel.archives-ouvertes.fr/tel-00536355.
Der volle Inhalt der QuelleLaroche, Edouard. „Identification et Commande Robuste de Systèmes Électromécaniques“. Habilitation à diriger des recherches, Université Louis Pasteur - Strasbourg I, 2007. http://tel.archives-ouvertes.fr/tel-00354139.
Der volle Inhalt der QuelleCe mémoire est organisé autour des trois systèmes applicatifs traités. A chacun d'entre eux est consacré une partie distincte. Puisqu'une grande partie des problématiques scientifiques traitées est transversale et abordée pour plusieurs systèmes, j'ai choisi de les introduire dans la première partie de ce rapport.
Bougatef, Naima. „Commande sous contraintes des systèmes discrets périodiques“. Phd thesis, Ecole Supérieure d'Ingénieurs de Poitiers - ESIP, 2012. http://tel.archives-ouvertes.fr/tel-00960391.
Der volle Inhalt der QuelleMénigot, Sébastien. „Commande optimale appliquée aux systèmes d'imagerie ultrasonore“. Phd thesis, Université François Rabelais - Tours, 2011. http://tel.archives-ouvertes.fr/tel-00657980.
Der volle Inhalt der QuelleMarchand, Nicolas. „Contribution à la commande contrainte des systèmes“. Habilitation à diriger des recherches, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00813273.
Der volle Inhalt der QuelleBai, Jing. „Commande des Systèmes Multi-agent d'Ordre Fractionnaire“. Thesis, Ecole centrale de Lille, 2015. http://www.theses.fr/2015ECLI0019/document.
Der volle Inhalt der QuelleThis thesis focuses on the distributed coordination of fractional-order multi-agent systems under fixed directed communication graph. Firstly, formation producing with absolute damping and communication delay of fractional-order multi-agent systems is studied. A control law is proposed and some sufficient conditions are derived for achieving formation producing. However, in some scenarios, it might be desirable that all agents achieve formation and move as a group, instead of rendezvous at a stationary point. Therefore, secondly, formation producing with relative damping and communication delay is considered. Thirdly, consensus tracking of fractional-order multi-agent systems with a time-varying reference state is studied. A common control law and a control law based on error predictor are proposed, and it is shown that the control laws are effective when a communication graph has directed spanning trees. Meanwhile, it is proved that the convergence of systems is faster using the control law based on error predictor than by the common one. Finally, the above control laws are extended to achieve formation-tracking problems. In fact, in many cases information can be sent from a reference state to only its neighbor agents not to all the agents. In order to solve the above problem, an effective control law is given to achieve consensus with a constant reference state. Then, an effective general control law and an effective particular one are proposed to achieve consensus with a time-varying reference state. Furthermore, the above control laws are extended to achieve the formation tracking problems
Vieira, Alexandre. „Commande optimale des systèmes de complémentarité linéaires“. Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAT064/document.
Der volle Inhalt der QuelleThis thesis focuses on the optimal control of Linear Complementarity Systems (LCS). LCS are dynamical systems defined through Differential Algebraic Equations (DAE), where one of the variable is defined by a Linear Complementarity Problem.These systems can be found in the modeling of various phenomena, as Nash equilibria, hybrid dynamical systems or modeling of electrical circuits. Properties of the solution to these DAE essentially depend on properties that the matrix D in the complementarity must meet. These complementarity constraints induce two different challenges. First, the analysis of these dynamical systems often use state of the art tools, and their study still has some unansweredquestions. Second, the optimal control of these systems causes troubles due to on one hand the presence of the state in the constraints, on the other hand the violation of Constraint Qualifications, that are a recurring hypothesis for optimisation problems.The research presented in this manuscript focuses on the optimal control of these systems. We mainly focus on the quadratic optimal control problem (minimisation of a quadratic functional involving the state and the control), and the minimal time control. The results present two different aspects: first, we start with an analytical approach in order to find necessary conditions of optimality (if possible, these conditions are proved to be sufficient); secondly, a numerical approach is tackled, with the aim of getting precise results with a reduced computational time
De, Hillerin Safta. „Commande robuste de systèmes non linéaires incertains“. Thesis, Supélec, 2011. http://www.theses.fr/2011SUPL0015/document.
Der volle Inhalt der QuelleThis thesis studies the LPV approach for the robust control of nonlinear systems. Its originality is to propose for the first time a rigorous framework allowing to solve efficiently nonlinear synthesis problems.The LPV approach was proposed as an extension of the H-infinity approach in the context of LPV (Linear Parameter-Varying) systems and nonlinear systems. Although this approach seemed promising, it was not much used in practise. Indeed, beyond certain theoretical limitations, the nature itself of the obtained solutions did not seem adequate. This open question constitutes the starting point of our work.We first prove that the observed weak variation of the controllers is in fact mostly due to the information structure traditionally used for LPV synthesis, and that under reasonable assumptions, the LPV framework can overlap feedback linearization strategies. This point having been resolved, a second difficulty lies in the actual achievement of nonlinear controllers yielding performance guarantees. We propose a rigorous framework allowing to solve efficiently an incremental synthesis problem, through the resolution of an LPV problem associated to a specific information structure compatible with the one identified in the first part.This study and its corollary description of a formal framework and of a complete controller synthesis procedure, including complexity reduction methods, provide powerful arguments in favor of the LPV approach for the robust control of nonlinear systems
Charbonnier, François. „Commande supervisée des systèmes à évènements discrets“. Grenoble INPG, 1996. http://www.theses.fr/1996INPG0007.
Der volle Inhalt der QuelleLefebvre, Dimitri. „Commande par précompensation dynamique des systèmes généralisés“. Lille 1, 1994. http://www.theses.fr/1994LIL10171.
Der volle Inhalt der QuelleGalaz-Larios, Martha Cecilia. „Commande non linéaire de systèmes de puissance“. Paris 11, 2003. http://www.theses.fr/2003PA112092.
Der volle Inhalt der QuelleThis thesis is devoted to the problem of enlarging the region of attraction of equilibria in power systems; we focus our attention on power systems after a symmetrical 3-phase short circuit fault and propose a new passivity-based controller design methodology for excitation control of synchronous generators. The methodology shapes the total energy function via modification of the energy transfer between the mechanical and electrical components of the system. Applying the procedure it is shown that a, properly tuned, state feedback enlarges both the estimates and the actual domain of attraction, thus increasing critical clearing time for faults. Moreover, we study the problem of identification of the network parameters and the desired equilibrium in applications of excitation control for synchronous generators. Our main contribution in this context is the construction of a new nonlinear identifier that provides asymptotically consistent estimates (with guaranteed transient bounds) of the line impedance and the equilibrium for the classical flux--decay model of a single generator connected to an infinite bus. This model is nonlinear, and nonlinearly parameterized, and the equilibria displays a nonlinearly dependence on the unknown parameters. The proposed estimator can be used, adopting a certainty equivalent approach, to make adaptive any power system stabilizer that relies on the knowledge of these parameters. Finally using the fact that a Hamiltonian system is invariant to a change of coordinates, we propose a new controller that in the new coordinates implies the electrical power as state variable
Gapaillard, Muriel. „Représentation, commande et identification de systèmes hybrides“. Angers, 2005. http://www.theses.fr/2005ANGE0023.
Der volle Inhalt der QuelleTwo classes of hybrid systems with controlled or autonomous jumps and switchings are studied. Continuous representations of these systems are introduced, which enable to avoid difficulties associated with discontinuities. These representations are used to solve optimal control and identification problems. This approach, leading to the replacement of a hybrid problem by a continuous one, is justified by convergence theorems to either classical minima or epsilon-quasiminima with no compacity assumption, that are demonstrated by Gronwall’s lemma and Lebesgue’s theorem. These representations enable to solve hybrid problems by means of methods adapted to continuous problems. This possibility is illustrated by the use of calculus of variations. The practical advantages brought by the representations are highlighted
Trofino-Neto, Alexandre. „Commande robuste et performance des systèmes incertains“. Grenoble INPG, 1993. http://www.theses.fr/1993INPG0016.
Der volle Inhalt der QuelleHassan, Azzam. „Contribution à la commande des systèmes discontinus“. Grenoble INPG, 1993. http://www.theses.fr/1993INPG0044.
Der volle Inhalt der QuelleManceur, Malik. „Commande robuste des systèmes non linéaires complexes“. Thesis, Reims, 2012. http://www.theses.fr/2012REIMS003/document.
Der volle Inhalt der QuelleThis work deals with a fuzzy tracking control design for uncertain nonlinear dynamic system withexternal disturbances and using a TS (Takagi-Sugeno) fuzzy model description. The control is basedon the Super-Twisting algorithm, which is among of second order sliding mode control. Moreover, twoadaptive fuzzy type-2 systems have been introduced to generate the two Super-Twisting signals toavoid both the chattering and the constraint on the knowledge of disturbances and uncertainties upperbounds. These adaptive fuzzy type-2 systems has only one input : the sliding surface, and one output :the optimale values of the control gains, which are hard to compute with the original algorithm.Simulation results are obtained in order to compare the performances of the proposed method tothat given by Levant. Then, we have introduced the integral sliding mode concept to impose inadvance the convergence time and the arrival on the sliding surface. The proposed approaches aregeneralized to the case of multivariable systems. Several results in simulation and in real time usinga benchmark are obtained to validate and to confirm the performances of our contributions
Maalej, Sonia. „Commande robuste des systèmes à paramètres variables“. Thesis, Lille 1, 2014. http://www.theses.fr/2014LIL10209/document.
Der volle Inhalt der QuelleThis work focuses on the stability analysis and the robust control synthesis for nonlinear systems. The design of controllers/observers ofen require a complite or partiel knowledge of the process model to control. Nevertheless, obtaining a model both reable and sufficiently accurate is not only difficult and time-consuming but also it increases the total cdevelopment cost of a control system. In order to reduce the quantity and quality of informations required on the system, new methods of observers and controllers synthesis have been proposed. With known models, an output feedback controller based Luenberger observer was proposed. For this control law, the system closed loop is viewed as the interconnection composed with the ideal closed loop and the observation error. In case where few informations are available, a restricted-model (''model-free'') controller is proposed. In order to estimate the system state, non-asymtotic derivators /estimators based on differentiel algebra or asymptotic ones such as observers or filters have been considered. Both of these control laws have allow to maintain the nonlinear aspects of the system and to obtain general results by reformulating the problem into convex polytopic systems forms. The works of this thesis mainly relies on direct Lyapunov method with quadratic function
Yedes-Bougatef, Naima. „Commande sous contraintes des systèmes discrets périodiques“. Thesis, Poitiers, 2012. http://www.theses.fr/2012POIT2305/document.
Der volle Inhalt der QuelleThis thesis deals with the analysis and the control problem of periodic linear discrete systems (PLDS). The contributions presented in this work focuses on the constrained control of PLDS. Conditions for stability analysis and positivity are established in terms of strict LMI (Linear Matrix Inequalities). The stabilization of PLDS under the condition that the closed-loop system is positive and stable is addressed as well as the case of bounded state and/ or control variables. The obtained results are then extended to the synthesis of robust state feedback controllers, where some of which are based on the S − procedure technique. Furthermore, some conditions of stability and stabilization of PLDS with delays are established. The problem of stabilization of constrained PLDS is addressed based on the Lyapunov techniques or the Linear Programming techniques. The robust H∞ state feedback control in which both robust stability and a prescribed H∞ performance are required is investigated
Bekaik, Mounir. „Commande des systèmes non linéaires à retard“. Thesis, Paris 11, 2012. http://www.theses.fr/2012PA112411.
Der volle Inhalt der QuelleThis PhD thesis is focused on three main objectives. The first goal is to develop a method of construction of state feedbacks without retarded terms that render the origin of timevarying nonlinear systems with a distributed input delay globally uniformly asymptotically stable.The second objective is the adaptation of the celebrated technique of construction of state feedbacks called ’backstepping’ to the case of nonlinear systems in feedback form with a pointwise constant delay in the input. The third aim of this thesis is to solve a problem of practical stabilization for a family of nonlinear systems with sampled retarded state feedbacks whose sampling instants depend on the value of the state variable of the system. Each of these three goals relies on the introduction of operators of a new type. Robustness results of Input-to-State-Stability type are established by using Lyapunov-Krasovskii functionals
Zerkaoui, Salem. „Commande neuronale adaptative des systèmes non linéaires“. Le Havre, 2007. http://www.theses.fr/2007LEHA0010.
Der volle Inhalt der QuelleThe main contribution of this work is to propose a robust stable self-adaptive InDirect neural Network Control "IDNC" to control a broad variety of unknown linear, nonlinear, SISO and MIMO systems. The control scheme is made of an adaptive instantaneous neural model, a neural controller and an on-line parameter updating law. The IDNC parameters start at zero initial conditions which ensure that the performances do not depend on the initialization phase. Closed loop performances as well as sufficient conditions for asymptotic stability and robustness are derived from the Lyapunov approach. The simulations and experimental tests are carried out in order to validate the performances of the proposed approach. In particular, our contribution is used for the control of the Tennessee Eastman Challenge Process and a medical robot. Also, the proposed structure can easily be implemented in several practical applications
Vera, Estrada Martin Carlos. „Modélisation et commande des systèmes dynamiques hybrides“. Grenoble INPG, 2000. http://www.theses.fr/2000INPG0055.
Der volle Inhalt der QuelleFischman, Arao. „Commande robuste des systèmes sous contraintes structurelles“. Grenoble INPG, 1998. http://www.theses.fr/1998INPG0007.
Der volle Inhalt der Quelle