Dissertations / Theses on the topic 'Commande des systèmes dynamiques'
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Cébron, Benoît. "Commande de systèmes dynamiques hybrides." Angers, 2000. http://www.theses.fr/2000ANGE0022.
Full textA 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
Vera, Estrada Martin Carlos. "Modélisation et commande des systèmes dynamiques hybrides." Grenoble INPG, 2000. http://www.theses.fr/2000INPG0055.
Full textOlaru, 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.
Full textProdan, Ionela. "Commande sous contraintes de systèmes dynamiques multi-agents." Phd thesis, Supélec, 2012. http://tel.archives-ouvertes.fr/tel-00783221.
Full textBonnet, Stéphane. "Approches numériques pour la commande des systèmes dynamiques." Compiègne, 2008. http://www.theses.fr/2008COMP1745.
Full textWhile advanced control schemes are generally based upon the knowledge of an analytical plant model, the idea developed here is to use instead a numerical state-space model, given as a one-step prediction function of the dynamical behavior of the system, and suitable predictive control algorithms to perform the control task. That model is lookuptable-based. The table contains, for each initial state condition and admissible control input, both taken from discrete subspaces of the corresponding continuous state and input spaces of the plant, the output and state values obtained from a constant control after one time-step. Using that model and knowing the current state of the system, a prediction of its state and outputs as a function of possible inputs can be efficiently computed. If a given output objective for the next time-step is known, the appropriate control inputs can be computed. Here, the output objective is build so that the plant outputs follow a dynamical behavior similar to that of a given reference linear system. The control problem is then to find the inputs minimizing for the next step the distance between that objective and the predicted plant outputs. The proposed predictive control algorithm implements that control scheme while focusing on minimizing the computing effort needed. This is achieved by building a linear interpolator-based approximation of the prediction function from the lookup-table data and by approximately solving the minimization problem through specific and efficient descent-based numerical algorithms. Two applications of this scheme are carried out. The first one is a real-life experiment, applied to a laboratory active magnetic bearing where each axis is considered independently, showing the scheme correctly lends itself to the control of fast electromechanical systems and that it is robust towards perturbations and model errors. The second application deals with the stabilization of a simulated multiple-input “PVTOL”-type aircraft, showing the algorithm can be generalized to more complex systems
Villa, Ramirez José Luis. "Modélisation et commande de systèmes hybrides : l'approche MLD." Nantes, 2004. http://www.theses.fr/2004NANT2003.
Full textRiedinger, Pierre. "Contribution à la commande optimale des systèmes dynamiques hybrides." Vandoeuvre-les-Nancy, INPL, 1999. http://www.theses.fr/1999INPL128N.
Full textTognetti, Calliero. "Commande de systèmes dynamiques: stabilité absolue, saturation et bilinéarité." Phd thesis, INSA de Toulouse, 2009. http://tel.archives-ouvertes.fr/tel-00621132.
Full textTognetti, Taïs Calliero. "Commande de systèmes dynamiques : stabilité absolue, saturation et bilinéarité." Toulouse, INSA, 2009. http://eprint.insa-toulouse.fr/archive/00000405/.
Full textThis thesis presents contributions to the solution of theproblems of stability analysis and synthesis of state feedback controllers for dynamic systems with non-linear elements, by means of conditions based on linear matrix inequalities and Lyapunov functions. For switched systems subject to saturation in the actuators, convex conditions to design switched and robust controllers are presented. The saturation is modeled as a sector non-linearity and an estimate of the domain of stability is determined. For linear systems with polytopic uncertainties and sector non-linearities, convex conditions of finite dimension to build Lur’e functions with homogeneous polynomially parameter dependence are provided. If satisfied, the conditions guarantee the stability of the entire domain of uncertainty for all sector non-linearities, allowing the design oflinear and non-linear robust statefeedback stabilizing controllers. For continuous and discrete-time unstable bilinear systems, a procedure to design a state feedback stabilizing control gain is proposed. The method is based on the alternate solution of two convex optimization problems described by linear matrix inequalities, providing an estimate of the domain of stability. Extensions to handle robust and linear parameter varying controllers are also presented
Boukal, Yassine. "Observation et commande des systèmes dynamiques d’ordre non entier." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0154/document.
Full textThis work focuses on the synthesis of observers and the controller laws for fractional order systems. The presented document consists of 4 chapters: The first chapter of the theses manuscript contains an introduction dealing with the basic mathematical notions and the stability analysis of fractional systems as well as a presentation of the different definitions. The stability conditions of these systems and some examples of systems modeled by fractional differential equations are presented. In the second chapter, we were interested in the design of several types of observers of reduced order, full order, and functional observers for fractional systems with and without delays. In the case where there are no delays in the dynamics of the system, observers of full and reduced orders have been synthesized in order to ensure the estimation of the pseudo-states. In a second step, a functional observer was synthesized in the case where the delay is present in the dynamics of the system. In Chapter 3, we worked on observer synthesis for uncertain fractional order systems. Our contributions are classified into three main lines: first, when the system under consideration is affected by unknown inputs, a functional observer has been proposed. In the second part, H∞ observers for fractional order systems with and without delays have been synthesized to ensure the stability of the estimation error. It is a question of guaranteeing a bound of the L2 gain between the observation error and the non-measurable perturbations affecting the dynamics of the system: this gain L2 is also called H∞ norm. In last part of this chapter, the synthesis of a robust observer with respect to modeling uncertainties for this class of systems is presented. The sufficient conditions of convergence of the estimation errors of the pseudo-states obtained are established in the form of a set of matrix inequalities LMIs. The last chapter of the manuscript is devoted to the command based on the different observers obtained. We were interested in observer-based control for fractional order systems. This command is based on the observers proposed in the previous chapters. Stability conditions and synthesis procedures are presented
Boukal, Yassine. "Observation et commande des systèmes dynamiques d’ordre non entier." Electronic Thesis or Diss., Université de Lorraine, 2017. http://www.theses.fr/2017LORR0154.
Full textThis work focuses on the synthesis of observers and the controller laws for fractional order systems. The presented document consists of 4 chapters: The first chapter of the theses manuscript contains an introduction dealing with the basic mathematical notions and the stability analysis of fractional systems as well as a presentation of the different definitions. The stability conditions of these systems and some examples of systems modeled by fractional differential equations are presented. In the second chapter, we were interested in the design of several types of observers of reduced order, full order, and functional observers for fractional systems with and without delays. In the case where there are no delays in the dynamics of the system, observers of full and reduced orders have been synthesized in order to ensure the estimation of the pseudo-states. In a second step, a functional observer was synthesized in the case where the delay is present in the dynamics of the system. In Chapter 3, we worked on observer synthesis for uncertain fractional order systems. Our contributions are classified into three main lines: first, when the system under consideration is affected by unknown inputs, a functional observer has been proposed. In the second part, H∞ observers for fractional order systems with and without delays have been synthesized to ensure the stability of the estimation error. It is a question of guaranteeing a bound of the L2 gain between the observation error and the non-measurable perturbations affecting the dynamics of the system: this gain L2 is also called H∞ norm. In last part of this chapter, the synthesis of a robust observer with respect to modeling uncertainties for this class of systems is presented. The sufficient conditions of convergence of the estimation errors of the pseudo-states obtained are established in the form of a set of matrix inequalities LMIs. The last chapter of the manuscript is devoted to the command based on the different observers obtained. We were interested in observer-based control for fractional order systems. This command is based on the observers proposed in the previous chapters. Stability conditions and synthesis procedures are presented
Gao, Nan. "Observateurs dynamiques et commande des systèmes : application aux systèmes de grande dimension." Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0081/document.
Full textThe present thesis is the result of research conducted in Longwy, within the department Control, Identification, Diagnosis (CID) of Research Center for Automatic Control of Nancy (CRAN). This thesis investigates the problem of dynamic observer (full- and reduced-order) and observer-based control design and their applications to large-scale systems. Firstly, a new form of H-infinity dynamic observer is designed for linear systems in the presence of unknown inputs and disturbances. The proposed observer generalizes the existing results on proportional observer and proportional integral observer. The observer design is based on the solution of linear matrix inequalities (LMI). Both continuous-time and discrete-time systems are considered. Thereafter, by inserting the proposed observer into a closed-loop, an observer-based control is presented for uncertain systems in the presence of disturbances. Based on the parameterization of algebraic constraints obtained from the analysis of the estimation error, the control design is derived from the solution of bilinear matrix inequality, by using a two-steps algorithm. Finally, the obtained results have been extended to large-scale systems. A decentralized observer-based control is proposed for large-scale uncertain systems in the presence of disturbances. These systems are composed of several interconnected subsystems of low dimensions, where the interconnections are assumed to be nonlinear and satisfy quadratic constraints
Gao, Nan. "Observateurs dynamiques et commande des systèmes : application aux systèmes de grande dimension." Electronic Thesis or Diss., Université de Lorraine, 2015. http://www.theses.fr/2015LORR0081.
Full textThe present thesis is the result of research conducted in Longwy, within the department Control, Identification, Diagnosis (CID) of Research Center for Automatic Control of Nancy (CRAN). This thesis investigates the problem of dynamic observer (full- and reduced-order) and observer-based control design and their applications to large-scale systems. Firstly, a new form of H-infinity dynamic observer is designed for linear systems in the presence of unknown inputs and disturbances. The proposed observer generalizes the existing results on proportional observer and proportional integral observer. The observer design is based on the solution of linear matrix inequalities (LMI). Both continuous-time and discrete-time systems are considered. Thereafter, by inserting the proposed observer into a closed-loop, an observer-based control is presented for uncertain systems in the presence of disturbances. Based on the parameterization of algebraic constraints obtained from the analysis of the estimation error, the control design is derived from the solution of bilinear matrix inequality, by using a two-steps algorithm. Finally, the obtained results have been extended to large-scale systems. A decentralized observer-based control is proposed for large-scale uncertain systems in the presence of disturbances. These systems are composed of several interconnected subsystems of low dimensions, where the interconnections are assumed to be nonlinear and satisfy quadratic constraints
Donzé, Alexandre. "Trajectoires pour la vérification et la commande de systémes continus et hybrides." Grenoble 1, 2007. http://www.theses.fr/2007GRE10067.
Full textWe present a set of methods for the verification and control of continuous and hybrid systems, based on the use of individual trajectories. Ln the first part, we specify the class of the systems considered and their properties. We start from continuous systems governed by ordinary differential equations to which we add inputs and discrete events, thus constituting a class of hybrid dynamical systems. The second part is devoted to the verification problem and is based on reachable sets computations. We study how a finite number of trajectories can cover the infinite set of the states reachable by the system. We show that by using a sensitivity analysis w. R. T. Initial conditions, an over-approxirnation of the reachable set can be obtained. We deducefrom it an algorithm which, by an iterative and hierarchical selection of the trajectories, finds quickly a bad behavior or proves that none exists. Thethird part is concerned with optimal control and is based on approximate dynamic prograrnming techniques. A cost is defined for each trajectory, and the inputs minimizing this cost are deduced from a value function defmed on the state-space and which we represent by using a function approxirnator. We use the experience provided by test trajectories to improve this approximation. Lastly, we use the results of the second part to select these trajectories in coherence with the local generalization properties of the function approximator and in order to restrict the exploration of the state-space to limit the computational cost
Demaya, Bernard. "Commande floue de systèmes à dynamiques complexes : application à la commande d'un moteur thermique." Toulouse, INSA, 1994. http://www.theses.fr/1994ISAT0043.
Full textBen, Salah Jaâfar. "Analyse et commande des systèmes non linéaires complexes : application aux systèmes dynamiques à commutation." Phd thesis, Université Claude Bernard - Lyon I, 2009. http://tel.archives-ouvertes.fr/tel-00599364.
Full textCorbier, Christophe. "Contribution à l’estimation robuste de modèles dynamiques : Application à la commande de systèmes dynamiques complexes." Thesis, Paris, ENSAM, 2012. http://www.theses.fr/2012ENAM0041/document.
Full textComplex dynamic systems identification remains a concern when prediction errors contain innovation outliers. They have the effect to damage the estimated model if the estimation criterion is badly chosen and badly adapted. The consequence is the contamination of the distribution of these errors; this distribution presents heavy tails and deviates of the normal distribution. To solve this problem, there is a robust estimator's class, less sensitive to the outliers, which treat the transition between residuals of very different levels in a softer way. The Huber's M-estimators belong to this class. They are associated to a mixed L2 - L1 norm, related to a disturbed Gaussian distribution model, namely gross error model. From this formal context, in this thesis we propose a set of estimation and validation tools of black-box linear and pseudo-linear models, with extension of the noise interval to low values of the tuning constant in the Huber's norm. We present the convergence properties of the robust estimation criterion and the robust estimator. We show that the extension of the noise interval reduces the sensitivity of the bias of the estimator and improves the robustness to the leverage points. Moreover, for a pseudo-linear model structure, we present a new context, named L-FTE, with a new method to determine L, in order to linearize the gradient and the Hessien of estimation criterion and the asymptotic covariance matrix of the estimator. From these expressions, a robust version of the FPE validation criterion is established and we propose a new decisional tool for the estimated model choice. Experiments on simulated and real systems are presented and analyzed
Corbier, Christophe. "Contribution à l'estimation robuste de modèles dynamiques : Application à la commande de systèmes dynamiques complexes." Phd thesis, Ecole nationale supérieure d'arts et métiers - ENSAM, 2012. http://pastel.archives-ouvertes.fr/pastel-00832168.
Full textZouari, Farouk [Verfasser]. "Sur la Commande Adaptative Neuronale de Systèmes Dynamiques Complexes / Farouk Zouari." München : GRIN Verlag, 2015. http://d-nb.info/1184038775/34.
Full textAlif, Adil. "Sur l'observation et la commande des systèmes dynamiques linéaires à retards." Nancy 1, 2005. http://www.theses.fr/2005NAN10184.
Full textThe work presented here stands in the field of trajectories tracking for time delay systems in the time domain approach. It is divided into two parts : The first part contains the problems related to the estimation of retarded or neutral systems, namely, the H∞ filtering, unknown input filtering, observerbased controller. New approaches are introduced to salve these problems. Theoretical and numerical comparaisons with other existing results are presented to underline the relevance of the obtained results. The second part is based on new approaches to deal with problems related to the trajectories tracking and arbitrary model following. Procedures to design robust controllers ensuring the asymptotic tracking purpose, and guaranteing the H∞ performances, are presented. Numerical examples and simulations are presented to illustrate the proposed methods
Gati, Mehdi. "Modélisation, observation et commande de systèmes dynamiques hybrides : application à l'automobile." Paris 11, 2006. http://www.theses.fr/2006PA112052.
Full textIn this thesis, we were interested on the modelling and control of hybrid dynamical systems. We study two phenomena that presents this kind of behavior, the jerkiness of vehicle acceleration and the homogeneous combustion. The jerkiness of vehicle acceleration is usually defined as the uncomfortable oscillations of the acceleration that is due to a sharp change on the motor torque. To eliminate theses oscillations we, first, develop a physical model of the vehicle driveline including the mane mechanical components contributing to the phenomenon. The obtained model was piecewise affine because of the backlash present in the powertrain. We applied a model predictive control scheme to deal with such kind of non linearities, and wecompare the closed loop performance to the one of a linear control loop. We also applied techniques of state estimation that we developed in this thesis to the vehicle driveline. The second studied phenomenon was the homogenous combustion. With this type of combustion, the temperature dynamics of gases have a hybrid behaviour. In this thesis we present a reduced model for the homogenous combustion that shown a good correlation with measures. From this model, we derive a second "hybrid" model that is suitable for parameter identification, control and state estimation
Murilo, de Almeida Pinto André. "Contributions à la commande prédictive non linéaire pour les systèmes à dynamiques rapides." Grenoble INPG, 2009. https://tel.archives-ouvertes.fr/tel-00442847.
Full textThis thesis addresses the challenging problem of applying nonlinear model predictive control (NMPC) to fast dynamical systems. For these systems, the available computational time may be insufficient to solve the underlying non convex optimization problems. In this context, the parameterized approach may be a potential candidate solution to deal with fast systems. Two practical applications are shown to emphasize the advantages of the parameterized approach: the diesel engine air path and the twin-pendulum system. Experimental validation results are proposed for the two processes in order to show the efficiency of the proposed framework
Gapaillard, Muriel. "Représentation, commande et identification de systèmes hybrides." Angers, 2005. http://www.theses.fr/2005ANGE0023.
Full textTwo 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
Dietrich, Florian. "Analyse et contrôle de systèmes de dynamiques d'opinions." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0214/document.
Full textOpinion dynamics systems aroused renewed interest in the Control System Theory and Applied Mathematics communities. This can be explained by the emergence of online social networks and the possibility of exploiting and understanding associated behaviours and data. Opinion dynamic models are special cases of multi-agent systems. These systems have various applications such as controlling the behaviour of a fleet of collaborative robots. A system of opinion dynamics is thus composed of several agents. The state of each agent is then modeled by a real number, which represents the agent's opinion on a certain subject. The mathematical models of opinion dynamics then describe the evolution of agents' opinions over time. Many results have been obtained on the asymptotic behaviour of these systems, notably on convergence towards consensus, when the opinion of all agents of the system tend towards the same value. The less well known transient state also presents interesting phenomena such as the formation of local transient agreements, which are more tricky to define. A study of these phenomena is presented for discrete-time opinion dynamics systems with generic state dependent influence functions. The main contribution proposes a criterion for detecting the formation of these local agreements, as well as a prediction of the duration during which this criterion is verified. The second part of this thesis focuses on opinion dynamics in continuous time in which one of the agents, called leader, has a particular role: the evolution of its opinion is controllable. For systems with time and state-dependent influence functions and under certain conditions, a control law is presented that allows the leader to gather all agents in its neighbourhood in finite time and then steer them to a desired consensus value. In addition, the problem of time optimal control which consists in bringing all agents together in the neighborhood of the leader in minimal time is also examined for the case of only state-dependent influence functions. The Pontryagin Maximum Principle specifies the class of admissible optimal controls with implicit expressions within a general framework. For the particular case where there is no interaction between agents, the time-optimal control law has been obtained in practice for any initial conditions
Dietrich, Florian. "Analyse et contrôle de systèmes de dynamiques d'opinions." Electronic Thesis or Diss., Université de Lorraine, 2017. http://www.theses.fr/2017LORR0214.
Full textOpinion dynamics systems aroused renewed interest in the Control System Theory and Applied Mathematics communities. This can be explained by the emergence of online social networks and the possibility of exploiting and understanding associated behaviours and data. Opinion dynamic models are special cases of multi-agent systems. These systems have various applications such as controlling the behaviour of a fleet of collaborative robots. A system of opinion dynamics is thus composed of several agents. The state of each agent is then modeled by a real number, which represents the agent's opinion on a certain subject. The mathematical models of opinion dynamics then describe the evolution of agents' opinions over time. Many results have been obtained on the asymptotic behaviour of these systems, notably on convergence towards consensus, when the opinion of all agents of the system tend towards the same value. The less well known transient state also presents interesting phenomena such as the formation of local transient agreements, which are more tricky to define. A study of these phenomena is presented for discrete-time opinion dynamics systems with generic state dependent influence functions. The main contribution proposes a criterion for detecting the formation of these local agreements, as well as a prediction of the duration during which this criterion is verified. The second part of this thesis focuses on opinion dynamics in continuous time in which one of the agents, called leader, has a particular role: the evolution of its opinion is controllable. For systems with time and state-dependent influence functions and under certain conditions, a control law is presented that allows the leader to gather all agents in its neighbourhood in finite time and then steer them to a desired consensus value. In addition, the problem of time optimal control which consists in bringing all agents together in the neighborhood of the leader in minimal time is also examined for the case of only state-dependent influence functions. The Pontryagin Maximum Principle specifies the class of admissible optimal controls with implicit expressions within a general framework. For the particular case where there is no interaction between agents, the time-optimal control law has been obtained in practice for any initial conditions
Saadni, Mohammed Salah. "Contribution à la commande robuste d'une classe de systèmes dynamiques à retard." Poitiers, 2006. http://www.theses.fr/2006POIT2336.
Full textThis PhD thesis is dedicated to the development of the tools for the computation of state or output feedback control law for a class of dynamical time-delay systems. The considered models are linear time invariant state space models of infinite dimension. They are subject to uncertainties that can result from approximations while building the model. Techniques relevant to analysis and control have to take those uncertainties into account. The analysis tools considered in this thesis have to provide dependent-delay conditions to check the stability for the considered class of time delay systems. Some criteria are given to this end. The tools dedicated to the computation of control laws enable to design a state feedback or static or dynamical output feedback as well as observer-based controller to guarantee the stability of the closed-loop system whatever the nature of uncertainty is. All those tools, for both analysis and control, rely upon Lyapunov theory (Lyapunov-Krasovskii theorem and Lyapunov-Razumikhin theorem), as well as upon numerical solutions to problems expressed in terms of LMI
Nguyen, Minh Tri. "Commande prédictive sous contraintes de sécurité pour des systèmes dynamiques Multi-Agents." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLC071/document.
Full textThis thesis presents optimizationbased control techniques for dynamical Multi-Agent systems (MAS) subject to collision avoidance constraints. From the set-theoretic point of view, collision avoidance objective can be translated into non-overlapping conditions for the safety regions characterizing each agent/obstacle while maintaining the convergence towards a specified formation. Among the successful optimizationbased control methods, Model Predictive Control (MPC) is used for constraints handling. First, a leader-follower structure is considered as a basic decentralized architecture. The followers functioning zone assignment is decided by the leader and then the local linear feedback control is computed such that the follower operates strictly inside its authorized zone, offering anti-collision guarantees. Second, a dynamic Voronoi partition based deployment of the agents using an inner target driver is developed. The main novelty is to consider the Chebyshev center as the inner target for each agent, leading to an optimization-based decentralized predictive control design. In the same topic, other inner targets are considered such as the center of mass or vertex interpolated center. Third, set-theoretic tools are used to design a centralized FDI layer for dynamical MAS, leading to the exclusion of a faulty agent from the MAS formation and the integration of an external healthy/recovered agent in the current formation. The set-based FDI allows detecting and isolating these faulty agents to protect the current formation using centralized predictive control techniques
Mezyani, Touria El. "Méthodologie de surveillance des systèmes dynamiques hybrides." Lille 1, 2005. https://pepite-depot.univ-lille.fr/RESTREINT/Th_Num/2005/50376-2005-122.pdf.
Full textLin-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.
Full textLa 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.
Mitsiouk, Anton. "Contribution à l'optimisation des systèmes dynamiques : application au génie des procédés." Phd thesis, Toulouse, INPT, 2007. http://oatao.univ-toulouse.fr/7650/1/mitsiouk.pdf.
Full textLaganier, Frank S. "Simulation dynamique de procédés : méthodes itératives dynamiques pour la résolution de systèmes algébro-différentiels." Toulouse, INPT, 1993. http://www.theses.fr/1993INPT038G.
Full textMailleret, Ludovic. "Stabilisation globale de systèmes dynamiques positifs malconnus : applications en biologie." Nice, 2004. http://www.theses.fr/2004NICE4024.
Full textWorks presented in this thesis focus on problems related to the control of positive systems of nonlinear ordinary differential equations. Biological models that aim at describing the evolution of positive quantities do belong to this class of systems. These models often include some parts, related to the phenomenon’s biology, which have unknown analytical expressions but are known in a qualitative manner. In this thesis, we propose to use these qualitative properties together with a control law, based on the measurement of the uncertain part, in order to globally stabilize any trajectory towards a single equilibrium. A brief state of the art on positive systems begins the thesis. We introduce then a control law, able to ensure the global stabilization of the considered class of systems. The introduction of an adaptive part enhances our approach, so that the control law is able to deal with some parameter uncertainties. We apply these results to some biological models : fishery management model, bioreactors exploiting microorganisms… One of our main applications concerns cascade bioreactions occurring in bioreactors some experimental tests of our approach on an anaerobic digester, an efficient but very sensitive waste water treatment plant, validate our approach
Taleb, Marwa. "Contribution à la commande prédictive des systèmes dynamiques modélisés par réseaux de Petri." Thesis, Le Havre, 2016. http://www.theses.fr/2016LEHA0026/document.
Full textThis thesis concerns the development of predictive control strategies for some classes of continuous, discrete and hybrid dynamic systems modeled by specific extensions of Petri nets. For continuous systems and in order to limit the computational complexity inherent to the standard form of the predictive control, several improvements are proposed. These improvements allow overcoming the problem of hill climbing that characterizes trajectories obtained with some Petri nets. They also ensure the possibility to implement real-time control by adapting the prediction horizon in order to reduce the algorithmic complexity. Finally, they limit actuators solicitation while ensuring the asymptotic stability of the controlled system. For timed discrete systems and in order to avoid the exhaustive exploration of the reachability graph, a control method is proposed, based on the predictive control applied to a continuous approximation of the discrete system. Finally for hybrid systems, hybrid predictive control is developed, inspired by the continuous predictive control. The performance of these different control strategies are evaluated and compared to different numerical simulations
Nguyen, Hoai Nam. "Commande sous contraintes pour des systèmes dynamiques incertains : une approache basée sur l'interpolation." Phd thesis, Supélec, 2012. http://tel.archives-ouvertes.fr/tel-00783829.
Full textKhaled, Yassine. "Contribution à la commande et l'observation des systèmes dynamiques continus sous mesures clairsemées." Thesis, Cergy-Pontoise, 2014. http://www.theses.fr/2014CERG0706/document.
Full textThis thesis deals with the stability analysis of impulsive systems and the design of impulsive observers for systems under sparse measurements.The measures are sparse but random in order to avoid the loss of observability.Moreover, it is highlighted that the synthesis of an impulsive observer coupled with a classical continuous observer via an observer gain is an appropriate solution to reconstruct the continuous system state and to stabilize this system by state feedback based on these observers. In addition, this new scheme (impulsive observer coupled with classical observer) can reconstruct the output vector, even if the available measurement do not verify the Nyquist-Shannon conditions. Another part is dedicated to the detection of the active mode and to the estimation of the associated continuous state for a class of linear hybrid systems under sparse measurements. The solution we found to this problem is firstly the observability of systems under random sampling and secondly the design of an impulsive observer. Here, the first approach is based on the concept of compressive sensing theory well known in signal processing. The design of the impulsive observer is presented for some special classes of nonlinear systems.Moreover, a novel observer design method for continuous nonlinear systems withdiscrete measurements is proposed. This method uses the Lipchitz conditions andthe mean value theorem in order to transform the problem in a linear one.Finally, the proposed observer are tested on application to the synchronization of chaotic systems dedicated to the secure communications
Nour, el Alaoui Omar. "Sur le comportement cyclique des systèmes dynamiques hybrides." Reims, 2002. http://www.theses.fr/2002REIMS004.
Full textCerrada-Lozada, Mariela. "Sur les modèles flous adaptatifs dynamiques." Toulouse, INSA, 2003. http://www.theses.fr/2003ISAT0021.
Full textThis work deals with the proposition of an adaptive fuzzy model with dynamical membership functions. The identification of the parameters of these membership functions is performed by a on-line reinforcement learning-based algorithm. This approach takes into account the system variables dynamic by incorporating the mean value and the variance, at time t, of the input and output variables of the fuzzy model into its membership functions. By this way, the fuzzy sets associated to the fuzzy variables, are relocated on the domain of discourse according to the sampled mean and variance values; thus, a disjointed partition of the fuzzy sets of the fuzzy model could be avoid. The dynamical property of the proposed fuzzy models is an asset in fuzzy control problems in case of time-varying nonlinear systems, for example. Classical examples related to the identification of time-varying nonlinear functions show the capabilities of the dynamical fuzzy models. An application to predictive control has been developed using the fuzzy model as one step ahead predictor and the reinforcement learning in the optimization problem of this type of control scheme. Finally, a discussion about the use of the information provided by the dynamical membership functions is presented in order to accomplish diagnosis and supervision tasks at upper levels
Jussiau, William. "Lois de commande pour le contrôle des écoulements oscillateurs." Electronic Thesis or Diss., Toulouse, ISAE, 2024. http://www.theses.fr/2024ESAE0032.
Full textThis thesis deals with the synthesis of control laws for oscillator flows at low Reynolds number. We study two canonical 2D configurations : the flow around a cylinder, and the flow over an open cavity. Both present an unstable stationary equilibrium, and a regime of self-sustained oscillations – respectively, a limit cycle and a toroidal attractor. The main objective is the synthesis of control laws to completely suppress the oscillatory regime, to reduce the mean drag, structural vibrations or tonal noise. In practice, the synthesis of control laws for these systems is rendered difficult by the diversity of dynamic phenomena emerging from the infinite-dimensional, non-linear Navier-Stokes equations. In this thesis, we propose three distinct methods for the synthesis of suitable controllers for these systems, using increasingly less restrictive assumptions. The first method makes joint use of a parameterization of stabilizing controllers, a derivative-free optimization algorithm and nonlinear simulation data. The second method exploits the supercritical Hopf bifurcation to build correctors from nonlinear simulations only. The third method relies on the mean resolvent framework to iteratively construct a piecewise-LTI control law from input-output data only
Lefebvre, Dimitri. "Commande par précompensation dynamique des systèmes généralisés." Lille 1, 1994. http://www.theses.fr/1994LIL10171.
Full textManon, Philippe. "Sur l'optimisation des séquences de fonctionnement des systèmes dynamiques hybrides." Lyon 1, 2001. http://www.theses.fr/2001LYO10046.
Full textDanès, Patrick. "Interfaçage symbolique-numérique dans la simulation qualitative des systèmes dynamiques." Toulouse 3, 1995. http://www.theses.fr/1995TOU30072.
Full textRiu, Delphine. "Modélisation et commande de systèmes électriques : de leur structure optimale à leurs performances dynamiques." Habilitation à diriger des recherches, Université de Grenoble, 2010. http://tel.archives-ouvertes.fr/tel-00566876.
Full textLavigne, Loïc. "Outils d'analyse et de synthèse des lois de commande robuste des systèmes dynamiques plats." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2003. http://tel.archives-ouvertes.fr/tel-00186323.
Full textLavigne, Loïc. "Outils d'analyses et de synthèses des lois de commande robustes des systèmes dynamiques plats." Bordeaux 1, 2003. http://www.theses.fr/2003BOR12673.
Full textJanat, Yaman. "Commande CRONE monovariable et multivariable de systèmes peu amortis." Toulouse 3, 2007. http://thesesups.ups-tlse.fr/56/.
Full textThe vibrations reduction is a major issue in the industrial field. This thesis deals with active control to attenuate the resonances of a structure. The two experimental devices of this thesis are processes with piezoelectric ceramics; one is monovariable and the other is multivariable. The first one is a simple model composed of a free-clamped beam only subjected to bending. The second is a simplified model of an airplane wing, subjected at the same time to bending and torsion. In the frame of our work, the processes being at the same time lightly-damped and uncertain, the control strategy lies on fractional robust control (CRONE control) and iso-damping contours. The iso-damping contours are particularly adapted to the control of vibrations since the graduation of the iso-damping contour tangent to an open-loop Nichols locus is the damping factor of the closed-loop response. The CRONE control aims at insuring the robustness of the stability degree of the control, taking into account the plant uncertainties. The stability degree is measured by the resonance factor or the damping factor and the plant uncertainties are taken into account without over-estimation. This thesis has shown the efficiency of the CRONE control associated to the iso-damping contours in order to deal with uncertain and lightly damped processes. The studied processes are well-better damped and experimental results have confirmed the robustness of the control
This thesis work is placed at the crossroad of Automatic control, Artificial Intelligence and Biotechnology. It aims at developing a modelling and control methodology based on a fuzzy logic approach. The first part of the work presents an introduction to the principles and techniques used in current wastewater treatment plants. It highlights the difficulty in modelling the multiple phenomena involved. From this fact, in the second part, focused on fuzzy modelling and control, we develop initially the identification of affine fuzzy models of Takagi-Sugeno (TS) type from input-output data. We used several fuzzy clustering methods as well as an agglomerative-competitive method which is robust in presence of noise. This type of "grey box" approach allows a rule-based representation which approximates the nonlinear dynamics as a concatenation of locally linear sub-models in the nonlinear autoregressive form (NARX). Moreover, we have developed a graphical version of the FMID toolbox for the fuzzy modelling of systems. Then, we propose a suboptimal linear-quadratic TS fuzzy control relevant to the structure of the identified fuzzy model, by using the parallel distributed compensation (PDC) technique. Finally, the whole methodology is tested and validated in simulation on an aerobic wastewater treatment bioprocess
Motchon, Koffi Mawussé Djidula. "Caractérisation de la discernabilité des systèmes dynamiques linéaires et non-linéaires affines en la commande." Thesis, Lille 1, 2016. http://www.theses.fr/2016LIL10027/document.
Full textThe distinguishability of the input-output behavior of two dynamical systems plays a crucialrole in many applications such as control and observation of hybrid dynamical systems. Thisthesis aims to characterize this property of distinguishability. For linear systems and nonlinearcontrol-affine systems, we establish: conditions for strict distinguishability that ensure thedistinguishability of the systems for every control input jointly applied to them; conditions forcontrolled-distinguishability that guarantee the existence of a control input which makes distinguishable the outputs of the systems; conditions for residual-distinguishability that characterize the distinguishability of the modes through parity-space residuals. Moreover, in the linear case, a metric is specified in order to quantify for a given control input, the distinguishability degreeof the systems and the robustness of the property of distinguishability
Loverini, Corinne. "Identification de systèmes dynamiques non-linéaires à l'aide de représentations multi-modèles." Vandoeuvre-les-Nancy, INPL, 1999. http://www.theses.fr/1999INPL041N.
Full textThe problem of system modelling is classical for process control. The aim is to present, with an optimal accuracy, the system behaviour. In general, real processes are non linear, multi-variables and time-varying parameters. It is therefore quite difficult to geta global system representation so that it is valid for any operating regime. The multi-models approach is based on the design of several quite simple models, called local models. Each local model is valid for a given operating point and around this point in a region of the operating domain defined within a weight function. These local models are further integrated using a weight expression in order to get an algebraic expression. This expression links the process inputs and outputs so that a global description is obtained. Many multi-model structures can be defined in order to describe the actual behaviour of more complex processes but, whatever the strategy is, the main problem relies on the increasing number of parameters to be identified. That is why, we develop a multi-model structure called "Hammerstein generalisé" (generalized Hammerstein) that allows us to get a smaller (in the number of parameters sense) representation of a given process. Such a multi-models structure depends , m parameter within non linear functions and we propose accordingly algorithms in order to estimate such parameters. In particular, we develop an iterative global method based upon sensitivity functions so that ail the model parameters are obtained: the parameters of the weight functions, of the local models and of the dynamic part. The previous global estimation method is applied on a multi-variables activated sludge process. We then compare the performances and the robustness of the developed identification algorithm on a simulated example. Finally, an esearch of the optimal multi-model structure of the process is performed with the search of the more significant inputs of the process behaviour, the optimal number of local models but also of the order of the dynamic model based on an extension of statistical tools already available for linear models
Rakoto-Ravalontsalama, Naly. "Sur l'interface numérique-symbolique dans un schéma de supervision de systèmes dynamiques à l'aide de systèmes experts." Toulouse 3, 1993. http://www.theses.fr/1993TOU30283.
Full textIndriago, Carlos. "Application du paradigme holonique aux systèmes de contrôle hybrides." Nantes, 2015. https://archive.bu.univ-nantes.fr/pollux/show/show?id=f9d22c8d-ecf1-40bd-9175-af76b71d2eaa.
Full textSeveral studies typically arise from the interaction of discrete planning algorithms and continuous processes, normally called hybrid control systems. It consists in three distinct levels, the controller, the plant and the interface. Hybrid control systems are conventionally modeled by switching patterns using the whole system instead of atomic resource. Therefore, the reconfiguration process is complex because it must take into account the system as a whole, making the hybrid control systems inflexible and more susceptible to uncertainties. The need for flexibility thus leads several teams to investigate the application of holonic paradigm to hybrid control systems. The objective of this document is to demonstrate the possibility to apply almost directly a holonic discrete-event based reference architecture to hybrid control systems. To do this, it is proposed a model called holonic hybrid control model (H2CM) derived from the PROSA architecture application on hybrid control systems. Two study cases were taken for verifying the proper operation of the proposed model; the first is a typical example from the hybrid systems literature call switched arrival systems and a second is an example from a real process in industrial electricity generation process, specifically a Combined Cycle Plant (CCP). Both study cases were simulated in Java and a series of experiments looking for measure flexibility, autonomy, cooperativeness, performance and stability were applied
Bompart, Vincent. "Optimisation non lisse pour la commande des systèmes de l'aéronautique." Toulouse 3, 2007. http://thesesups.ups-tlse.fr/76/.
Full textModern controller design methods for linear dynamical systems are based on solving matrix equations (Lyapunov, Riccati) or on optimization programs with matrix inequality constraints (LMI, BMI). The execution times of these techniques are often prohibitive, because of auxiliary variables (called Lyapunov variables), whose number grows quadratically with the plant order. Furthermore, they lead to analytical and computational difficulties when the sought controller is static, reduced-order, or when it is finely structured, although such constraints very often arise in a realistic setting. In order to solve such challenging problems efficiently, the approach adopted in this thesis consists in formulating them in the theoretical and general framework of nonlinear, nonconvex, and more specifically here, nonsmooth programming. The problems of closed-loop stabilization, H-infinity synthesis, or satisfaction of time-domain constraints arise naturally in this formalism and are studied in this thesis. Firstly, we propose a nonsmooth descent algorithm which exploits an exhaustive description of the Clarke subdifferential. It is applied to each of these three fundamental control problems. Its numerical efficiency and versatility are stressed through a vast array of applications in structured or fixed-order controller synthesis. A second approach, specifically developed for H-infinity synthesis, is based on a smooth local reformulation of the problem and solved with the sequential quadratic programming (SQP) algorithm. Its faster convergence is illustrated with static output feedback control examples