Dissertations / Theses on the topic 'Observation-Commande'
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El, Assoudi Abdellatif. "Observation et commande des systèmes mécaniques." Lyon 1, 1994. http://www.theses.fr/1994LYO10039.
Full textElkhalil, Mansoura. "Modélisation, observation et commande : une approche multimodèle." Phd thesis, Université de Caen, 2011. http://tel.archives-ouvertes.fr/tel-01064321.
Full textDib, Abdou. "Observation et Commande de la Machine Asynchrone." Phd thesis, Université de Caen, 2012. http://tel.archives-ouvertes.fr/tel-01064016.
Full textZerrougui, Mohamed. "Observation et commande des systèmes singuliers non linéaires." Phd thesis, Université Henri Poincaré - Nancy I, 2011. http://tel.archives-ouvertes.fr/tel-00705339.
Full textMansouri, Mejda. "Observation et commande des systèmes de grande dimension." Phd thesis, Université de Lorraine, 2012. http://tel.archives-ouvertes.fr/tel-00808649.
Full textHajji, Sofien. "Modélisation, observation et commande de la machine asynchrone." Phd thesis, Université de Caen, 2009. http://tel.archives-ouvertes.fr/tel-01058792.
Full textKader, Zohra. "Commande et observation des systèmes affines à commutations." Thesis, Lille 1, 2017. http://www.theses.fr/2017LIL10108/document.
Full textThis thesis is dedicated to the study of the stabilization problem of switched affine systems with state-dependent switching laws. First, an overview of some existing results is proposed. In order to define the closed-loop system's solutions and to analyze its behavior over the switching surfaces the Filippov formalism is used. The stabilization problem is addressed using a Lyapunov approach which allows to derive numerical approaches based on LMIs. Throughout this thesis both switched affine systems and LTI systems with relay controllers are considered. Using a general framework for the class of nonlinear input-affine systems, a full state-dependent switching controller is designed in order to ensure both local and global asymptotic stability of the closed-loop system. Thanks to switching (Lur'e type) Lyapunov functions, a numerical approach based on LMIs that allows to derive a nonlinear stabilizing switching law is proposed. Moreover, a design approach of robust state-dependent switching laws for switched affine systems stabilization are proposed. The robustness property is studied with respect to bounded exogenous disturbances that affect the state measurements which are used for the design of the switching laws. Finally, observer-based switching controllers are designed to guarantee both local and global asymptotic stability of the closed-loop system. Using both quadratic and non-quadratic Lyapunov functions, linear and nonlinear switching surfaces are designed. The derived switching surfaces depend on the estimated state which is computed by a Luenberger observer. For both switched affine systems and LTI systems with relay controller the separation principle is proved
Sadelli, Lounis. "Modélisation, observation et commande de robots vasculaires magnétiques." Thesis, Orléans, 2016. http://www.theses.fr/2016ORLE2065/document.
Full textMinimally invasive surgery is an active research area since such systems have the potential to perform complex surgical procedures such as targeted therapies or in situ diagnosis, while minimizing trauma, side effects and recovery time. Miniaturized systems magnetically propelled by remote actuation can achieve swimming through the blood vessels network in order to provide targeted therapy, even for hard-to-reach human organs. This PhD thesis aims at addressing i) a review on the modeling of microrobots immersed in blood vessels, ii) a classification of the state space forms of such systems, iii) the synthesis of state feedbacks ensuring the stabilization of the microrobots along a reference trajectory, iv) the synthesis of observers to rebuild the unmeasured state variables. Magnetic microrobots swimming in a blood vessel face the hydrodynamic drag, surfacic and contact forces, magnetic interactions, and their apparent weight. These untethered robots are actuated by magnetic fields or magnetic gradients generation, and their localization is ensured by a medical imager. The microrobots dynamics (the so-called reduced system) lead to a nonlinear affine control subsystem with drift, and exhibits many uncertain physiological parameters, such as the blood velocity which can hardly be measured. The blood flow dynamics (the so-called fluidic system) are then modeled as an autonomous subsystem. These two subsystems result in an extended system describing the whole (robot and fluid) dynamics. The control objective is to stabilize the state of the reduced system along a reference trajectory, which is performed by an adaptive backstepping synthesis. Yet the full state is not accessible. We then synthesize either MVT or immersion based observers for the extended system, when the blood pulsation is either known or not. The output feedback stability is then proved. The stability and robustness to output noise, parametric uncertainty, and modeling errors are then illustrated by simulations
Briat, Corentin. "Commande et observation robustes des systèmes LPV retardés." Grenoble INPG, 2008. http://www.theses.fr/2008INPG0120.
Full textThis thesis pertains on the development of tools allowing for the study of LPV Time-Delay Systems. The provided approaches are based on Lyapunov-Krasovskii functionals or LFT used along with results like the small-gain theorem. Some methods to design controllers and observers are then derived from stability results expressed through LMIs. Robustness with respect to the uncertain knowledge on the delay value is ensured using appropriate techniques from robust analysis and control. Finally, a novel approach for the control of time-delay systems is introduced. In this approach, the controller is scheduled by an approximate value of the delay and such controllers are referred to as 'delay-scheduled controllers'. The fact that this controllers do not need to store past values of the state is a real advantage of the proposed technique
Li, Xiaodong. "Observation et commande de quelques systèmes à paramètres distribués." Phd thesis, Université Claude Bernard - Lyon I, 2009. http://tel.archives-ouvertes.fr/tel-00456850.
Full textHassan, Lama. "Observation et commande des systèmes non linéaires à retard." Phd thesis, Université de Lorraine, 2013. http://tel.archives-ouvertes.fr/tel-00934943.
Full textBen, Amor Selwa. "Observation et commande de systèmes non linéaires temps-discret." Lyon 1, 1997. http://www.theses.fr/1997LYO10124.
Full textFattouh, Anas. "Observation et commande numérique robustes des systèmes à retards." Grenoble INPG, 2000. http://www.theses.fr/2000INPG0120.
Full textOuadi, Hamid. "Modélisation, observation et commande de la machine asynchrone saturée." Caen, 2004. http://www.theses.fr/2004CAEN2036.
Full textBoukal, 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
Koehl, Arnaud. "Modélisation, observation et commande d'un drone miniature à birotor coaxial." Phd thesis, Université Henri Poincaré - Nancy I, 2012. http://tel.archives-ouvertes.fr/tel-00709015.
Full textGhanes, Malek. "OBSERVATION ET COMMANDE DE LA MACHINE ASYNCHRONE SANS CAPTEUR MÉCANIQUE." Phd thesis, Ecole centrale de nantes - ECN, 2005. http://tel.archives-ouvertes.fr/tel-00117094.
Full textAbu-Tabak, Nesmat. "Stabilité dynamique des systèmes électriques multimachines : modélisation, commande, observation et simulation." Phd thesis, Ecole Centrale de Lyon, 2008. http://tel.archives-ouvertes.fr/tel-00343722.
Full textSeuret, Alexandre. "Commande et observation des systèmes à retards variables : théorie et applications." Phd thesis, Ecole Centrale de Lille, 2006. http://tel.archives-ouvertes.fr/tel-00132099.
Full textLe premier chapitre est consacré à la présentation du contexte et des bases théoriques de l'étude.
Le deuxième chapitre traite du problème théorique de la stabilité et de la stabilisation exponentielles des systèmes linéaires à retard variable. L'étude concerne donc non seulement la convergence mais caractérise aussi sa rapidité.
Le troisième chapitre généralise ces résultats à des systèmes ne se réduisant pas à des équations linéaires stationnaires. En particulier, on considère deux problèmes pratiques : l'incertitude provenant de variation de paramètres et la saturation de commande.
Dans le quatrième chapitre, on procède à l'étude des systèmes continus à commande échantillonnée. L'approche par retard variable proposée permet d'utiliser des techniques de ``temps continu''.
Le cinquième chapitre concerne l'observation des systèmes à retard. Nous présentons des résultats concernant le cas, fréquent dans la littérature, de retard connu mais aussi de retard inconnu, plus délicat.
Le dernier chapitre présente quelques problèmes expérimentaux où les résultats théoriques trouvent finalement leur justification. Nous nous penchons particulièrement sur le problème de la commande d'un robot à distance à travers un réseau et de la commande d'un système dont les sorties proviennent d'un caméra qui induit un retard et un échantillonnage.
Nadri, Madiha. "Observation et commande des systèmes non linéaires et application aux bioprocédés." Lyon 1, 2001. http://www.theses.fr/2001LYO10013.
Full textGati, 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
Abu-Tabak, Nesmat Auriol Philippe. "Stabilité dynamique des systèmes électriques multimachines Modélisation, commande, observation et simulation /." [S.l.] : [s.n.], 2009. http://bibli.ec-lyon.fr/exl-doc/nabutabak.pdf.
Full textGasmi, Noussaiba. "Observation et commande d'une classe de systèmes non linéaires temps discret." Thesis, Université de Lorraine, 2018. http://www.theses.fr/2018LORR0177/document.
Full textThe analysis and synthesis of dynamic systems has undergone significant development in recent decades, as illustrated by the considerable number of published works in this field, and continue to be a research theme regularly explored. While most of the existing work concerns linear and nonlinear continuous-time systems, few results have been established in the discrete-time case. This thesis deals with the observation and control of a class of nonlinear discrete-time systems. First, the problem of state observer synthesis using a sliding window of measurements is discussed. Non-restrictive stability and robustness conditions are deduced. Two classes of discrete time nonlinear systems are studied: Lipschitz systems and one-side Lipschitz systems. Then, a dual approach was explored to derive a stabilizing control law based on observer-based state feedback. The conditions for the existence of an observer and a controller stabilizing the studied classes of nonlinear systems are expressed in term of LMI. The effectiveness and validity of the proposed approaches are shown through numerical examples
Ezzine, Montassar. "Observation et commande des systèmes linéaires dans les domaines temporel et fréquentiel." Phd thesis, Université Henri Poincaré - Nancy I, 2011. http://tel.archives-ouvertes.fr/tel-00653058.
Full textRiani, Akram. "Commande et observation des exosquelettes pour la rééducation fonctionnelle du membre supérieur." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLV026/document.
Full textThis thesis addresses the problem of control of an upper limb exoskeleton for mobility assistance of people who suffer from a motor deficit, characterized by a total or partial loss of motor skills. The robot used is designed by RB3D for the purpose of research work on the control laws for the rehabilitation of the upper limb at LISSI Laboratory (Laboratory Images, Signals and Intelligent Systems) of the UPEC university; this exoskeleton is called ULEL (Upper Limb Exoskeleton of LISSI).Two approaches to control exoskeletons for functional rehabilitation of the upper limb have been proposed. The first control is based on an online estimator of dynamic parameters. This adaptation method makes it possible to improve the control performance of this system, and to compensate for parametric errors due to coupling the exoskeleton with the human limb.The second contribution consists of a robust control strategy based on sliding modes. This nonlinear strategy guarantees the convergence of tracking errors to zero in finite time when the sliding mode is reached. This type of control is known by its robustness with respect to parametric variations and external disturbances. The effectiveness of the proposed method is experimentally demonstrated for the passive rehabilitation mode.Finally, in the last part of this thesis, a higher order sliding mode observer is proposed to estimate interactions torques of the human-exoskeleton system. The proposed observer is able to estimate the forces at the interaction interface between the exoskeleton and the human limb, using the position measurements and the control input. The obtained results show the effectiveness of the proposed solutions using the exoskeleton ULEL
Lombardi, Marc. "Modélisation, observation et commande pour les bioprocédés : application à la fermentation lactique." Lyon 1, 1996. http://www.theses.fr/1996LYO10148.
Full textVan, Dootingh Marjoleine. "Polymérisation radicalaire : commande géométrique et observation d'état à l'aide d'outils non linéaires." Rouen, 1992. http://www.theses.fr/1992ROUES022.
Full textAlaridh, Ibrahim. "Observation et commande tolérantes aux fautes de la dynamique latérale d'un véhicule." Thesis, Lille 1, 2019. http://www.theses.fr/2019LIL1I080.
Full textThis thesis deals in the area of an active fault tolerant control of actuators and sensors of vehicle. In the first step, the passive and active fault tolerant control and also the main faults occurring in the system are presented. The second technique is based on a module of surveillance and a module of reconfiguration which has been applied an electrical vehicle. To achieve this objective, many steps have been elaborated:a- The first one deals with the modeling of the vehicle. The model of the vehicle is based on nonlinear model. The model chooser is Linear Parameter Varying (LPV)b- The second step is dedicated to the development of an unknown input observer (UIO) based on the previous LPV model in order to estimate particularly the lateral velocity of the vehicle, yaw angle, etc... in the presence or not of disturbances. Then, a module of detection and isolation of faults has been built based on the previous results.c- The third step is most focused on lateral control of the vehicle which follows the desired trajectory. Due to the nonlinearities of the vehicle's model, the uncertainties and the disturbances encountered in the automotive systems, we have developed a robust control able to reject the disturbances caused by the wind, the variation of road adherence, etc... Controls based on state feedback LQR, control by Lyapunov stability and H-infinity control have been developed.d- In the last step, we have developed a reconfiguration module and it has been applied to a vehicle
Assaf, Ali. "Réduction de modèle, observation et commande prédictive d'une station d'épuration d'eaux usées." Thesis, Université de Lorraine, 2012. http://www.theses.fr/2012LORR0282/document.
Full textWastewater treatment processes are large scale, non linear systems, submitted to important disturbances of influent flow rate and load. Model predictive control (MPC) widely used industrial technique for advanced multivariable control, has been applied to the Benchmark Simulation Model 1 (BSM1) simulation benchmark of wastewater treatment process. An open loop identification method has been developed to determine a linear model for a set of input-output measurements of the process. All the step responses have been obtained in open loop from step variations of the manipulated inputs and measured disturbances around their steady state values. The non-linearities of the model are taken into account by variable parameters. The step responses coefficient obtained make it possible to determine by optimization the corresponding transfer functions. That functions are classified by five mathematical models, such as : first order, first order with integrator, inverse response, second order and second order with zero. The numerical values of coefficients of each model selected were calculated using a least squares criterion. Model predictive control (MPC) uses the resulting model as an internal model to control the process. Dynamic matrix control DMC and quadratic dynamic matrix control QDMC predictive control strategies, in the absence and presence of feedforward compensation, have been tested. Two measured disturbances have been used for feedforward control, the influent flow rate and ammonium concentration
Chorot, Thierry. "Modélisation commande et observation des systèmes mécaniques hamiltoniens : application à un pont roulant." Lyon 1, 1991. http://www.theses.fr/1991LYO10200.
Full textRoux, Gilles. "Surveillance dans les ateliers automatisés : une approche par observation d'un modèle de commande." Grenoble INPG, 1990. http://www.theses.fr/1990INPG0107.
Full textWang, Haoping. "Observation et commande par systèmes à fonctionnement par morceaux : application aux asservissements visuels." Thesis, Lille 1, 2008. http://www.theses.fr/2008LIL10063/document.
Full textThis research work deals with the study and the development of the linearization, state estimation and complex systems' control. Chapter 1 is devoted to the concept and classification of hybrid systems and to the origin and nature of the piecewise functioning systems (PFS). Thus, based on the PFS, chapter 2 proposes controllers for trajectories tracking and linearization of the real time plans. Chapters 3 and 4 aim at realizing the trajectory tracking or stabilization control in the case where the available feedback cornes from a digital sensor delivering the plant's output in a delayed and sampled format. ln chapter 3 a piecewise continuous observer which is essentially based on PFS theory and on dis crete Luenberger observer is developed. ln chapter 4, a stabilization control of a 2D or 3D inverted pendulum by using two feedbacks is proposed. At each sensor's sampling period, the control acts in the pendulum's balancing plan, which makes it possible to transform the 3D problem into a 2D one. Compared to other methods, the referred methods guarantee the stability without being based on a linearized model. ln this thesis, all proposed methods are illustrated with examples of simulation and real-time implementations
Gassara, Hamdi. "Analyse, commande et observation des modèles flous de type Takagi-Sugeno à état retardé." Amiens, 2011. http://www.theses.fr/2011AMIE0124.
Full textLucet, Emmanuel. "Observation à entrées inconnues et commande associée : application à un procédé d'extraction liquide-liquide." Grenoble INPG, 1998. http://www.theses.fr/1998INPG0112.
Full textSariñana, Toledo Aarón. "Commande directe et observation des convertisseurs de puissance : application à l'onduleur de tension triphase." Grenoble INPG, 2000. http://www.theses.fr/2000INPG0127.
Full textThis dissertation deals with the control and observation of the voltage source inverter. It is divided into 4 main parts. The first one concerns the modeling of the power converter, and its classical représentation into différent coordinates is shown in détail. At the same time, we présent in détail the différent applications which we are interested in: the reactive power compensation and the active filtering. The second part treats the study of a direct sliding mode controUer based on the minimal simplex. This approach allows to overcome some ambiguity problems arisen in the task of selecting the inverter's switches signais. Comparisons with the classical hystérésis controUer are made in order to highlight the main properties of the proposed approach. In the third part of this dissertation we propose an approach, based on the previous one, which allows to fixe the switching frequency of the converter. Moreover, this previous resuit was enhanced by adding a compensation technique of the delays induced by the measurement process. Some expérimental results showed the validity of the analysis and simulations. The last part of this work deals with the design of two kinds of nonlinear observers (a Kalman-type observer and a sliding mode observer). When applied to the power inverter, the observers offer us the possibility of reducing the number of sensors or even of using this soft sensor as redundant for security purposes. Two cases are treated in détail: an observer for the DC-link voltage from the measurements of the currents of the main and another one which allows to observe the currents of the main from the DC-link voltage's measurement
Afilal, Lissan. "Contribution a la commande d'un moteur pas a pas. Observation et optimisation des regimes transitoires." Reims, 1990. http://www.theses.fr/1990REIMS015.
Full textFakham, Hicham. "Commande et observation de la machine synchrone à aimants permanents à distribution de flux trapézoïdale." Versailles-St Quentin en Yvelines, 2006. http://www.theses.fr/2006VERS0006.
Full textIn the case of the Trapezoidal Permanent Magnet Synchronous Motor (TPMSM) drives, the detection of the rotor position is necessary. However, the position sensor uses here increases the cost and the size of the machine and reduces the reliability of the total system. In order to overcome this problem, we centred our research on the proposal of a new observer in order to estimate the rotor position and speed. We studied the modelling and the control of the TPMSM by proposing "the model of mode-six-steps ". Then, our study of the observability conditions of the PMSMT showed that the harmonics of order multiple of three pose a problem in the observation of the rotor position and the speed. Also, we substituted the simple electric quantities by phase-to-phase electric quantities. We then estimated the rotor position and the speed by using two different methods : "Extended Kalman filtre" and "Sliding Mode observer". The last part of our thesis gives to the experimental study of the sliding mode observer which is proposed
Ghattassi, Mohamed. "Modélisation, observation et commande d’une classe d’équations aux dérivées partielles : application aux matériaux semi-transparents." Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0123/document.
Full textThis thesis investigates the theoretical and numerical analysis of coupled radiative conductive heat transfer in a semi-transparent, gray and non-scattering 2D medium. This two heat transfer modes are described by the radiative transfer equation (RTE) and the nonlinear heat equation (NHE). We proved the existence and uniqueness of the solution of coupled systems with homogeneous Dirichlet boundary conditions using the fixed-point theorem. Moreover, we developed a useful algorithm to simulate the temperature in the medium. We used the quadrature $S_{N}$ for the angular discretization of the RTE. The spatial discretization of RTE was made by the discontinuous Galerkin method (DG) and the finite element method for the non-linear heat equation. We have shown the convergence and the stability of the coupled numerical scheme using the discrete fixed point. The discrète model obtained after an approximation allowed us to do the analysis and synthesis of state estimators and feedback control design for stabilization of the system. Thanks to the special structure of the model and using the Differential Mean Value Theorem (DMVT), we proposed a reduced order observer and we construct a gain matrix, which ensures the exponential stability of the proposed observer and guarantees the boundedness of the estimate vector. An extension to $\mathcal{H}_{\infty}$ filtering is also provided. We have extended the reduced order approach in the case of the observer-based controller and we proved the exponential stability under the control feedback law. Similarly, an extension to $\mathcal{H}_{\infty}$ filtering is also provided. The obtained results were validated through several numerical simulations
Chaib, Draa Khadidja. "Observation et commande des procédés de digestion anaérobie pour l'amélioration de la production de biogaz." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0128/document.
Full textIn this thesis, we propose a formal modelling framework for the anaerobic digestion process, where we add more degrees of freedom in the control of biogas production. Indeed, we add two additional control inputs to the standardized AM2 (Acidogenesis Methanogenesis, 2 steps) model, reflecting addition of stimulating substrates which enhance the biogas quality and quantity. Then, we describe how the parameters of the resulted nonlinear model can be identified, and we analyse the positiveness and boundedness of its state variables. Based on the derived mathematical model and the analysis results, we design different software sensors to overcome the lack of reliable and cheap sensors. Indeed, we present a general class of systems to which the considered process model belongs. Then, we design an LMI-based invariant like observer as well as an LMI-based nonlinear observer of the same form as the generalized Arcak’s observer. Furthermore, with the aim to render the observer design more robust to disturbances, we include the H∞ criterion in its synthesis. Also, to promote the use of the proposed observers in real applications, we extend the methodology to the discrete time case and to the case of nonlinear systems with nonlinear outputs. For the different observers design, we use the differential mean value theorem which allows the transformation of the nonlinear estimation error to a linear parameter varying system. Then, we use the Lipschitz conditions and the Lyapunov standard function to synthesize the stability conditions in the form of linear matrix inequalities. Finally, we enhance the feasibility of the later conditions by using a judicious reformulation of the Young’s inequality. In the thesis, we also deal with the process control where we propose a control strategy to track an admissible reference trajectory planned by the plant operator. Moreover, to account for the partial availability of the state vector measurements, we include an exponential nonlinear observer in the control synthesis. Thus, we design an observer based tracking control scheme. To perform the stability analysis of the closed loop system, composed of the system, the observer and the controller, we use the Barbalat’s lemma conjointly with the techniques already mentioned for the observers design. Finally, we propose two different methods to compute the controller and the observer parameters. In the first one, we propose to compute them separately. While, in the second one we compute the parameters simultaneously
Qin, Jinna. "Commande hybride position/force robuste d’un robot manipulateur utilisé en usinageet/ou en soudage." Thesis, Paris, ENSAM, 2013. http://www.theses.fr/2013ENAM0058/document.
Full textThe problem addressed in this thesis concerns the control of industrial robot manipulators which are slightly flexible and used for machining and FSW processes. The first objective is to model the robots and processes. The developed models concern the kinematics and dynamics models of 6-axis robots with serial architecture and flexibility localized at joints. The dynamic model parameters and a part of the joint stiffnesses are identified with the approach of output error which gives a satisfy estimation accuracy. According to identification, the RMS residue of the model is 3.2%. The second objective is to improve the robotization performance of manufacturing processes. A simulator was developed that contains the dynamic model of the flexible robot, the process models and the model of the robot controller including control laws in real time of axes and the trajectory generator. A nonlinear high-gains observer is proposed to estimate the complete states of robot system as well as the operation wrenches. Then the observer-based compensator is proposed to correct the positioning errors in real time. The experimental validation of industrial robots shows a satisfactory estimating performance of the observer. A precise FSW welding owing to the real-time compensation for the flexibility of manipulator has been done successfully
Laggoune, Nadhir. "Commande linéarisante et observation en temps continu et discret de certaines classes de systèmes non-linéaires." Lyon 1, 1987. http://www.theses.fr/1987LYO10142.
Full textLaggoune, Nadhir. "Commande linéarisante et observation en temps continu et discret de certaines classes de systèmes non-linéaires." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb376068570.
Full textMeghnous, Ahmed Rédha. "Commande et observation d'une classe de systèmes linéaires à commutations : Application aux convertisseurs de puissance DC-DC." Phd thesis, INSA de Lyon, 2013. http://tel.archives-ouvertes.fr/tel-01015252.
Full textMeghnous, Ahmed Rédha. "Commande et observation d’une classe de systèmes linéaires à commutations : Application aux convertisseurs de puissance DC-DC." Thesis, Lyon, INSA, 2013. http://www.theses.fr/2013ISAL0137/document.
Full textThis thesis is dedicated to the control and the observation of a class of switched linear systems (SLS). This class contains the systems that can be represented by a port-Hamiltonian model. A lot of works have been studied SLS for several years using an average modeling approach. Recently, various works have shown that hybrid system theory allows to cope with stabilization, controllability, and observability problems of switched linear systems. However, several problems are still open and need more development such as the design of hybrid observers for SLS that have unobservable modes or the control of systems with reduced number of switching inputs and numerous variable states to control. In this work, we are interested in the design of state observers for a particular class of SLS using both the average and the hybrid port-Hamiltonian models. This formalism has the necessary tools to study and establish the stability of the observation errors. At the beginning, a nonlinear observer based on the average modeling is proposed. Next, a hybrid observer is designed for switched linear systems. This observer takes into account the unobservable operating modes of the system. The second point of our work concerns the design of control laws for the considered class of SLS. At first, two Lyapunov-based control laws have been established using either an average model or a hybrid model of the system. A hybrid optimal control based on the maximum principle of Pontryagin and the computation of singular arcs has been also proposed. Finally, a hybrid predictive control based on a discrete model of the system is synthesized. Simulation results and an experimental implementation on a SEPIC converter are given to show the efficiency of the proposed methods. Our motivation to study such a converter is mainly due to its particular topology that includes observable and unobservable subsystems. It is also known to be difficult to be controlled because only one switching input is used to control four state variables
Drouot, Adrien. "Stratégies de commande pour la navigation autonome d'un drone projectile miniature." Phd thesis, Université de Lorraine, 2013. http://tel.archives-ouvertes.fr/tel-00921953.
Full textAmet, Leonardo. "Commande des systèmes à commutation : applications aux systèmes électriques." Thesis, Cergy-Pontoise, 2014. http://www.theses.fr/2014CERG0720/document.
Full textIn 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
Vorwald, Pierre. "Contrôle en position de la machine synchrone alimentée en courant entraînant une charge variable : commande par retour d'état avec observation du couple de charge : commande adaptative de type régulateur auto-ajustable." Toulouse, INPT, 1997. http://www.theses.fr/1997INPT121H.
Full textRiedinger, 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.
Full textLichiardopol, Stefan. "Etude de la dualité des modèles bond graphs : application à la commande." Ecole Centrale de Lille, 2007. http://tel.archives-ouvertes.fr/docs/00/28/15/75/PDF/Thesis.pdf.
Full textThe study of high-performance control laws for dynamic systems is the most active research field in system control. This research responds to the needs of the industry which uses higher performance machines. The proposed approach needs a precise knowledge of the physical phenomena of the system and the possibility of adapting to different situations. The research activity brings a contribution to these approaches, by studying the duality on different levels of control law synthesis. This study has allowed the creation of a characterization of duality on the model (duality between state space representations, duality between modules), the study of the duality between structural properties (controllability/observability) and between control laws (state feedback and output injection). These concepts are applied on different types of models (linear LTI and LTV, nonlinear). We have rephrased certain analysis concepts and control law synthesis procedures by using different classical approaches, graphical, algebraic (modules) and bond graphs. A great number of perspectives are considered
Becerra, Gerardo de Jesus. "Control and observation of switched systems. Application to power converters." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEI123.
Full textCurrent trends in global energy production indicate that renewables will continue to increase their market share due to continuous efficiency improvements and cost reductions. Power converters constitute the interfaces that enable energy transfers in microgrids between sources, storage and loads, playing a fundamental role in their operation. These devices are required to meet particular efficiency, robustness and stability requirements to guarantee a proper operation. The present work is focused on two particular problems present in the operation of power converters: control and observation. These problems are hard to solve because of the nonlinearities and complex behaviors present in power converters. The mathematical model used to represent power converters is the switched system. Based on this model we take elements from subjects like Lyapunov stability, the method of moments, algebraic geometry and direct filtering, and propose novel approaches to control and observation of switched systems. We introduce moment relaxations of switched systems. These representations allow to obtain models where the switching input is mapped to a moment space. This map removes the nonlinearity associated to the switching input and yields a model which is more suitable for performing numerical computations. This is the fundamental idea in the proposed parameter-varying control method. After computing a control signal for the relaxed model, the control signal for the switched system can be recovered. This approach has shown good performance with respect to reference tracking and stability. A data-driven approach for the observation of switched systems is proposed. This method involves the design of a direct filter that computes worst-case bounds on the estimation error. This method is applied to the case of power converters operating in continuous and discontinuous modes. A practical implementation is described, and its performance is compared with other estimation approaches