Teses / dissertações sobre o tema "Command H∞"
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Cox, Douglas A. "Airpower leadership on the front line General George H. Brett and combat command /". Maxwell Air Force Base, Ala. : Air University, 2004. https://research.maxwell.af.mil/papers/ay2004/ari/Cox.pdf.
Texto completo da fonteZhou, Huide. "Concepts thermodynamiques et d'entropie pour la modélisation et la régulation d'un réseau de transport". Thesis, Belfort-Montbéliard, 2014. http://www.theses.fr/2014BELF0231/document.
Texto completo da fonteIn this work, we have presented a thermodynamic point of view for the transportation network. Analogies have been drawn between thermodynamic and transportation systems by considering traffic lanes as thermodynamic sub-systems and the vehicles as the abstract energy supplied to them. In addition, the concepts of thermal capacity and temperature are also introduced into transportation context to correspond to lane capacity and occupancy respectively. Then, it has been demonstrated that the first law of thermodynamics corresponds to the conservation of vehicles. It is also demonstrated that the transportation network can have a similar notion of entropy. Such transportation entropy is a measure of disorder of the system and hence may provide deep insight in the analysis of transportation control problems. In particular, this work has presented a dissipativity phenomenon of transportation entropy that reduces the system disorder and hence renders the system better organized. Though this phenomenon doesn’t exist naturally in transportation context, the ways to construct feedback control strategies have been proposed to achieve such objective by means of Linear Matrix Inequalities (LMIs). However, since transportation systems involve massive complex human activities, there exist substantial unpredictable uncertainties of the traffic demands. In this context, we have proposed a robust controller for disturbance attenuation of transportation network. The errors between input flows and the nominal ones are considered as disturbances and a constrained H∞ control has been formulated in terms of maximization of the tolerance under control constraints. The problem of disturbance attenuation is solved by means of a convex optimization with Linear Matrix Inequality. Finally, two types of networks (arterial and grid) are carried out to illustrate the performances of our strategies
Gauthier, Christophe. "Commande multivariable de la pression d'injection dans un moteur diesel Common Rail". Grenoble INPG, 2007. http://www.theses.fr/2007INPG0054.
Texto completo da fonteVehicle exhaust emissions are today more and more restrictive. Common Rail engines allow to reach these requirements thanks to the high pressure injection. This pressure can vary from 200 up to 1600 bar according to the engine torque and speed. The goal of this work is to define the rail pressure controller based on the Common Rail features and to improve performance and robustness. Works have been done as follows: study of the Common Rail system and development of the physical model ; development of strategies and command laws ; real tests on vehicle. Vehicle tests showed a high improvement on performance and robustness thanks to the new methodology based on the Common Rail features and the advanced command laws (H8 control for Linear Parameter Varying systems). In particular the Linear Fractional Transformation (LFT) approach has been considered
Gallet, Alain. "Isolation vibratoire par commande robuste H "infini"". Aix-Marseille 1, 1996. http://www.theses.fr/1996AIX11022.
Texto completo da fonteXu, Cheng-Zhong. "Quelques résultats concrets sur la commande linéaire par l'approche H[infini]". Grenoble INPG, 1989. http://www.theses.fr/1989INPG0042.
Texto completo da fonteCassany, Louis. "Modélisation et régulation de la glycémie dans la maladie du diabète". Thesis, Bordeaux, 2022. http://www.theses.fr/2022BORD0224.
Texto completo da fonteRecent advancements in CGM sensors (Continuous Glucose Monitoring) and insulin pumps considerably improved the treatment of diabetes. However, CGM sensors can only measure the blood glucose level, limiting the insulin therapy algorithms. The IMS laboratory (Integration: from Material to Systems), the CBMN laboratory (Chemistry, Biology of Membranes and Nano-objects) and the CHU (University Hospital Center) gather specialists in diabetes, pancreatic islet biology, microelectronics and automatic control in order to develop new solutions for glycemic measurement and regulation for patients with diabetes. The work of this thesis falls within this context. The goal is to use the tools of the robust control theory in order to develop new insulinotherapy algorithms that can adapt to the physiological variability of the patient (age, weight...). These algorithms will be evaluated in the UVA/Padova simulator, currently the only simulator approved by the FDA (Food and Drug Administration) for in silico pre-clinical tests
Samblancat, Christiane. "Commande robuste multivariable : applications à l'hélicoptère". Toulouse, ENSAE, 1991. http://www.theses.fr/1991ESAE0014.
Texto completo da fonteMurciano, Alex. "Algorithmes de la commande robuste et implémentation logicielle". Paris 9, 1991. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=1991PA090006.
Texto completo da fonteFalcón, Prado Ricardo. "Active vibration control of flexible structures under input saturation through delay-based controllers and anti-windup compensators". Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPASG042.
Texto completo da fonteIn this work, the problem of active vibration control of flexible mechanical structures is addressed through infinite and finite dimensional techniques. The compared approaches are adjusted for an output feedback controller based on delayed proportional actions,through a quasipolynomial-based approach, and an optimalH∞ controller design computed with an LMI approach.They are shown in order to analyze their capabilities to damp some vibrational modes in the frequency band with of interest, and to avoid the so called “spillover”phenomenon. These controllers are synthetized through a finite dimensional model, derived from a finite element analysis of the mechanical structure, combined with some reduction methods.The flexible structures considered here are, firstly, aflexible aluminium beam in the Euler-Bernoulli configuration,and secondly, an axysimmetric membrane. Bothof them are equipped with two piezoelectric patches that are bounded and collocated on each face of the structure.We intend to examine and discuss the aforementioned performances in both simulation and experimental environments
Feng, Yu. "Commande H2 - H∞ non standard des systèmes implicites". Phd thesis, Ecole des Mines de Nantes, 2011. http://tel.archives-ouvertes.fr/tel-00678501.
Texto completo da fonteFadiga, Lamine. "Commande h∞ à base de modèles non entiers". Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0090/document.
Texto completo da fonteThe general theme of the work enables to extend H∞ control methodology to fractional order models. Two approaches are proposed. The first one consists in rewriting the fractional order model as an uncertain integer order model in order to use existing H∞ control methods for integer order models. The second approach consists in developing specific LMI conditions for fractional order models based on their pseudo state space representation. These two approaches are applied to the vibratory isolation of a bridge
Rance, Guillaume. "Commande H∞ paramétrique et application aux viseurs gyrostabilisés". Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS152/document.
Texto completo da fonteThis PhD thesis deals with the H∞ loop-shaping design for low order linear time invariant systems depending on unknown parameters. The objective of the PhD thesis is to obtain parametric H∞ controllers, i.e. controllers which depend explicitly on the unknown model parameters, and to apply them to the stabilization of gyrostabilized sights.Due to the unknown parameters, no numerical algorithm can solve the robust control problem. Using modern symbolic techniques dedicated to the solving of polynomial systems (Gröbner bases, discriminant varieties, etc.), we develop a new methodology to solve this problem for finite-dimensional linear systems.This approach shows several advantages : we can study the sensibilities of the H∞ criterion to the parameter variations, identify singular or remarquable values of the parameters, compute controllers which depend explicitly on the parameters, certify the numerical computations, etc. Furthermore, we show that this approach can be extended to a class of linear time-delay systems.More generally, this PhD thesis develops an algebraic approach for the study of algebraic Riccati equations. Thus, the methodology obtained can be extended to many different problems such as LQG control and Kalman or invariant filtering
Pellanda, Paulo César. "Commande de systèmes instationnaires : séquencement de compensateurs et commande LPV". Toulouse, ENSAE, 2001. http://www.theses.fr/2001ESAE0005.
Texto completo da fonteChrifi-Alaoui, Larbi. "Commande robuste à double degré de liberté - stabilité et H". Ecully, Ecole centrale de Lyon, 1994. http://www.theses.fr/1994ECDL0056.
Texto completo da fonteBlanco, Éric. "Lissage robuste et déconvolution". Lyon 1, 2002. http://www.theses.fr/2002LYO10165.
Texto completo da fonteRodrigues, Quintas Manuel. "Contribution à la modélisation et à la commande robuste des systèmes électrohydrauliques". Lyon, INSA, 1999. http://www.theses.fr/1999ISAL0042.
Texto completo da fonteThe work presented in this thesis covers two• closely related subjects: the first one is the modelling of an electrohydraulic axis when moving an uncertain inertial load on an horizontal plane, under large friction forces; the second one is the robust control of this device. Chapters one and two are concerned with the first subject, describing the development of a simulation model of the device behaviour as well as other models oriented towards the synthesis of different robust control strategies, such as nonlinear and linear tangent models. The first chapter, after a review of the main results concerning the modelling of electrohydraulic systems, presents a simulation model and proposes a sequence of simplifications leading to several different models usually described in the literature. The second chapter is mainly dedicated to the modelling of actuator friction and the static modelling of the power control device. A novel approach to the volumetrie flowrate characterization, enabling a better exploitation of available experimental data and a friction model including, among others, the viscoelastic behaviour of the actuator seals are presented in this chapter. Chapters three and four are concerned •with the second subject leading to a comparison of the performances of several robust control strategies, for different loads, actuator positions and trajectory profiles. An overview of the theoretical background concerning H…. Côntrol, the Corless-Leitmann robust control approach and nonlinear feedback linearization is presented on chapter three. In the fourth chapter, after model set up, the synthesis and implementation of the different controllaws is described. Experimental results are presented and discussed
Mokhtari, Abdellah. "Commande et observateur non linéaires robustes appliqués à un robot volant Quadrotor". Versailles-St Quentin en Yvelines, 2010. http://www.theses.fr/2010VERS0035.
Texto completo da fonteQuadrotor Unmanned aerial vehicles are being used more and more in civilian applications such as monitoring of traffic, recognition and surveillance vehicles, search and rescue operations They are highly capable to flown without an on-board pilot. UAVs have unmatched qualities that make them the only effective solution in specialized tasks where beyond normal human endurance is required, or where human presence is not necessary. Because of a fully autonomous operation and faster dynamics which lead to a difficult control design to obtain a satisfactory level of performance, a systematic study of the UAV dynamics representation seems to be necessary. Their successful application depends on their level of controllability and flying qualities. The Navigation System (GPS,INS,inclinometer,. . . ) is widely used as one component in guidance, navigation, and control systems. To calculate position and orientation of the Quadrotor. In this work a feedback linearization controller combined with a sliding mode observer is applied to quadrotor. The observer is used to reconstruct the unmeasured state necessary for the outer loop controller. A wind estimator is added to constitute an original concept with minimum sensors. To improve robustness of Quadrotor, a non linear robust controller based observer is proposed taking into account uncertainties, disturbances and noise measurement
Driemeyer, Franco Ana Lúcia. "Commande non linéaire robuste : une approche fondée sur une linéairisation par bouclage". Cachan, Ecole normale supérieure, 2006. http://www.theses.fr/2006DENS0003.
Texto completo da fonteThis thesis addresses the problem of robust control of nonlinear systems with respect to parameter variations and unstructured model uncertainties. In the conception of the controller proposed here, techniques of linear H,,,, synthesis associated with a robust feedback linearization are used. With this particular feedback linearization, the nonlinear system is transformed into its linear approximation around an operating point. The H,. Controller is obtained by using the McFarlane Glover method with loop shaping, which allows specifying the desired performance and robustness. The local robust stability of the nonlinear controller thus defined is demonstrated theoretically. Furthermore, this controller is evaluated through an application, the magnetic suspension, and its advantages are pointed out. Since the proposed controller is restricted to systems whose state is known, a procedure to extend it to other systems, by using state observers, is also studied
Ghamgui, Mariem. "Analyse et commande des systèmes multidimensionnels". Thesis, Poitiers, 2013. http://www.theses.fr/2013POIT2275.
Texto completo da fonteThis thesis deals with the analysis and the control of multidimensional systems. These systems can be defined as the classe of systems where the information is propagated in several independent direction. For instance, a 2D system with a dimension corresponding to space and, the other one to time. The contributions presented in this work focuses, on one hand, on the control of 2D discrete or continuous systems with constant or variable delays and on the other hand, on the synthesis of robust state feedback controllers for nD hybrid uncertain systems including parameter uncertainties complying with an implicit linear fractional representation (ILFR). Two approaches are used. One is based on the characteristic polynomial and the other on Lyapunov techniques. Sufficient conditions for stability and stabilization are established for 2D delayed discrete or continuous systems using Lyapunov approach. Conditions to insure both stability and a prescribed H∞ performance level are given for this class of systems. Then, a general framework for the establishment of computationally tractable LMI conditions to analyse the stability of nD hybrid systems is proposed. Robust stability and stabilization conditions are then established for nD hybrid uncertain systems. The uncertainties comply with an (ILFR) description
Fergani, Soheib. "Commande robuste LPV/H infini multivariable pour la dynamique véhicule". Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENT053/document.
Texto completo da fonteThe main issue of this thesis is to work out new Global Chassis MIMO controllers that enhance the overall dynamics of the vehicle while preserving the vehicle stability in critical driving situations. Many innovative strategies have been explored and finalized to deal with these problematics. Various solutions have been given to deal with the vehicle stability and performance objectives. Indeed, many works based on the LPV/Hinf approach have been developed to control simultaneously the braking, steering and suspension actuators. On the other hand, innovative road profile estimation strategies have been introduced and validated via experimental procedures, providing new cheap and easily implementable techniques to estimate the road profile characteristics. Then, the vehicle control is adapted, depending on the road roughness (since it influences greatly the behaviour and the stability of the car). Several fault tolerant control strategies have been also considered to handle the actuators failures while keeping the vehicle stability, safety and enhancing the dynamical behaviour of the car in dangerous and critical driving situations.The general content of this thesisis as follows :-PART I : Theoretical backgrounds and vehicle modeling.-PART II : Road adaptive control vehicle dynamics.-PART III : Global chassis control using several actuators.Also, during this thesis and using the previous works of the advisors and the thesis results, a Matlab ToolBox "Automotive" has been developed to provide a bench test for the different automotive control studies. Implementations on test beds and real vehicle are also achieved to prove the efficiency of the proposed strategies
Mouni, Emile Bowendnéré. "Contribution à l'amélioration des performances des génératrices synchrones : nouvelle structure d'excitation basée sur une machine à aimants et combinée à des lois de commande avancées". Poitiers, 2008. http://theses.edel.univ-poitiers.fr/theses/2008/Mouni-Emile-Bowendnere/2008-Mouni-Emile-Bowendnere-These.pdf.
Texto completo da fonteThe works presented in this dissertation are focussed on the study and the performances improvement of the synchronous generator. Then, a new excitation structure is proposed to directly feed the SG’s main armature. This exciter is based on a permanent magnet generator and thyristors bridge. In order to take real advantage of the new excitation structure, two modern and efficient control laws have been used: the predictive control and H∞ control. Both provide similar and very satisfactory results in simulation. Thanks to the real time implementation using the Dspace 1104, the effectiveness and the high performances of the new excitation approach have been proved. At the same time, an already used industrial excitation structure has been involved in the comparative study in order to quantify and qualify the real advantage of the new approach. Then, as regards voltage overshoots and drops, the time response and the output signal total harmonic distortion, the new excitation approach combined with modern control law gives better satisfaction than classical one
Monnet, Dominique. "Global minmax optimization for robust H∞ control". Thesis, Brest, École nationale supérieure de techniques avancées Bretagne, 2018. http://www.theses.fr/2018ENTA0009/document.
Texto completo da fonteH∞ control is nowadays used in many applications. This control technique enables to synthesize control laws which are robust with respect to external disturbances. Moreover, it allows to take model uncertainty into account in the synthesis process. As a consequence, H∞ control laws are robust with respect to both external disturbances and model uncertainty. A robust control law is a solution to an optimization problem, formulated from H∞ criteria. These criteria are the mathematical translations of the desired closed loop performance specifications. The two classical approaches to the optimization problem rely on the convex reformulation and local optimization methods. However, such approaches are unable to guarantee the optimality, with respect to the H∞ criteria, of the control law. This thesis proposes to investigate a global optimization approach to H∞ control. Contrary to convex and local approaches, global optimization methods enable to guarantee the optimality of the control, and also to take into account model uncertainty in a reliable way
Oliveira, Ramos Fausto De. "Automatisation de la synthèse H-infinie de compensateurs et de leurs réalisations sous forme estimation-commande". Toulouse, ISAE, 2011. http://www.theses.fr/2011ESAE0026.
Texto completo da fonteDuval, Cédric Arnaud Henri. "Commande robuste des machines asynchrones". Ecully, Ecole centrale de Lyon, 2002. http://www.theses.fr/2002ECDL0032.
Texto completo da fonteDeals with the robust control to parametric uncertainties of the induction motors. Our first approach consists in carrying out a vector control by orientation of rotor field using the compensations terms in order to uncouple and to linearise the voltages/currents transfers. The frequency command is calculated by self control, using the speed and the slip frequency, which is deduced from the equations of the induction motor. The robustness of the control loops of currents is ensured by HÆ correctors single-input single-output, using a simple and effective design method. The control was improved by the use of a Kalman observer which is reduced in delayed state, and extended to two parameters of the motor. Our second approach carries out the removing of the compensations terms and the self control. (. . . )
Zhang, Yi-Ming. "Synthesis of state estimation and H∞ predictive control for networked control systems". Rouen, 2014. http://www.theses.fr/2014ROUES017.
Texto completo da fonteThis thesis mainly focuses on networked controlled systems, which induce problems such as network-induced delays, packet losses and out-of-order in both the control and the feedback channels. The contribution of this thesis is twofold: the synthesis of (i) a control law and (ii) a network-faced robust estimation algorithm solving both these issues. About control, state-based network-faced generalized predictive control has been investigated, with a design covering a greater number of packet losses if compared to existing approaches in the literature. The main contribution is the resolution of the stability problem for generalized predictive control for a given disturbance level. About state estimation, a Kalman filtering approach has been proposed, with a threshold-length buffer and a dropping over-delayed packet strategy. Based on a linear matrix inequality theorem and modified Riccati equations with packet arrival rate, a complete mathematical relationship between the estimator convergence and the threshold-based packet arrival process is established, so that to derive a stability condition. Furthermore, constraints on state vector and model uncertainties have been both considered. The effectiveness of the proposed methods is illustrated on two different automotive applications: battery state of charge estimation and electromagnetic valves control
Pognant-Gros, Philippe. "De la réduction de modèles vers la commande robuste : application à la commande des canaux d'irrigation". Caen, 2003. http://www.theses.fr/2003CAEN2003.
Texto completo da fonteDinh, Marc. "Synthèse dépendant de paramètres par optimisation LMI de dimension finie : application à la synthèse de correcteurs reréglables". Caen, 2005. http://www.theses.fr/2005CAEN2040.
Texto completo da fonteDe, Hillerin Safta. "Commande robuste de systèmes non linéaires incertains". Thesis, Supélec, 2011. http://www.theses.fr/2011SUPL0015/document.
Texto completo da fonteThis thesis studies the LPV approach for the robust control of nonlinear systems. Its originality is to propose for the first time a rigorous framework allowing to solve efficiently nonlinear synthesis problems.The LPV approach was proposed as an extension of the H-infinity approach in the context of LPV (Linear Parameter-Varying) systems and nonlinear systems. Although this approach seemed promising, it was not much used in practise. Indeed, beyond certain theoretical limitations, the nature itself of the obtained solutions did not seem adequate. This open question constitutes the starting point of our work.We first prove that the observed weak variation of the controllers is in fact mostly due to the information structure traditionally used for LPV synthesis, and that under reasonable assumptions, the LPV framework can overlap feedback linearization strategies. This point having been resolved, a second difficulty lies in the actual achievement of nonlinear controllers yielding performance guarantees. We propose a rigorous framework allowing to solve efficiently an incremental synthesis problem, through the resolution of an LPV problem associated to a specific information structure compatible with the one identified in the first part.This study and its corollary description of a formal framework and of a complete controller synthesis procedure, including complexity reduction methods, provide powerful arguments in favor of the LPV approach for the robust control of nonlinear systems
Kim, Yong Kyu. "Analyse de robustesse et ses applications sur l'optimisation H-infini d'un système électromécanique". Vandoeuvre-les-Nancy, INPL, 1997. http://www.theses.fr/1997INPL070N.
Texto completo da fonteAmari, Nabil. "Développement et commande d’une plateforme microrobotique pour la synchronisation d’un faisceau de lumière". Thesis, Orléans, 2016. http://www.theses.fr/2016ORLE2072/document.
Texto completo da fonteWe present in this thesis the various stages in the design of a microrobotics platform dedicated to the manipulation of micro/nano objects in a synchrotron environment. It is composed of dual micro/nano manipulators in order to handle and to maintain a micro/nano-sample through the focus of a X-ray or laser beam for material characterization and analysis. The main idea is to control and to drive in a robust way the micro/nanomanipulators by focusing the beam on the center part of the handled micro-object. A microgripper based on two Atomic Force Microscope (AFM) tips with integrated piezoresistive force sensors is proposed. First, the dual manipulators are controlled cooperatively by combining the different actuator dynamics to track a laser beam with nanometer precision. A robust control strategy based on H∞ control ensures a robust microhandling task under the focus of the laser beam whatever the external perturbations involved and parametric model uncertainties. The Genetic Algorithm (GA) approach is used to compute the parameter weighting functions in to obtain an optimal H∞ controller. Then, we propose to compensate the laser beam variations (thermal drift, mechanical variations) by estimating the position of the laser beam using stochastic estimators (Kalman and particle filters). To this aim, the maximum intensity of the laser beam is measured and tracked in real-time by a four-quadrant photodiode sensor. Finally, experimental results performed of micro-spheres (diameter: 8 μm) demonstrate the robustness of the robotic microhandling tasks using the proposed control scheme strategy
LAVAL, LAURENT. "Modelisation et commande robuste en force d'un actionneur hydraulique confronte d'un environnement incertain : approche h et commande adaptative". Paris 6, 1997. http://www.theses.fr/1997PA066417.
Texto completo da fonteFache, Antoine. "Contribution à la commande robuste des systèmes non linéaires par modèle connexionniste : synthèse multicritère par l'approche LMI". Reims, 2001. http://www.theses.fr/2001REIMS008.
Texto completo da fonteAchnib, Asma. "Développement de la commande CRONE avec effet anticipatif robuste". Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0056/document.
Texto completo da fonteThe work presented in this thesis is part of the study of the effectiveness of CRONE control with anticipative effect in the problems of tracking and control for monovariable and multivariable systems. The anticipation objective is to design a control algorithm that minimizes a quadratic error between the reference and the output of the system and at the same time achieve a good level of the control signal. The proposed solution combines a robust feedback control with a feedforward control. The feedforward action uses optimality criteria and an anticipative filter which is designed in the frequency domain using a mix of $mathcal{H}_2$ et $mathcal{H}_infty$ constraints. The reduction of the number of parameters of the anticipative filter by using a slower sampling period for the anticipative filter is treated. Academic examples highlight the theoretical developments. A practical application on a hydraulic control system has shown the efficiency of the developed approach
Raisemche, Aziz. "Commande tolérante aux défauts d’une chaine de traction d’un véhicule électrique". Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112342/document.
Texto completo da fonteThe various international standards require automakers to optimize conventional power train but mainly to develop other alternatives to drive, one of the most promising is the electric vehicle. However, these new drives should guarantee the same performance and the same level of dependability (reliability and security in this case).Electric power train is built around a large number of components (electrical machine, the sensor, the converter, power electronics, etc.) which may be affected by defects. The detection and localization of these defects are essential but not sufficient to ensure the dependability of the system. Indeed, to ensure operation in degraded mode, you must implement architecture of fault tolerant control (FTC). The main objective of this thesis is to propose new fault tolerant control architectures of an electric vehicle induction machine power train in the presence of several types of mechanical sensor failure. This thesis is organized into four chapters.Chapter 1 is a comprehensive state of the art with a critical analysis of architectures and control systems tolerant to faults of electric powertrains and a state of the art of the various defects that may occur in the chain of electric traction.Chapter 2 proposes two architectures of fault tolerant control: Hybrid FTC and GIMC (Generalised Internal Model Control); Hybrid FTC approach is a combination of two controllers, the first is a PI controller for the sound mode and the second a robust controller for the failed H infinity mode. The architecture allows GIMC restructuring the control law in an adaptive manner. It is designed to ensure robustness of the system in the presence of a fault with an inner loop acting loop correction and diagnosis.Chapter 3 is devoted exclusively to the algorithm voting fault tolerant control based on comparative study of four algorithms with three different topologies: a first structure is proposed on the system output, a second structure is applied system control, and the third structure is a two preceding hybridization.Chapter 4 is devoted to the experimental validation of the architecture described above. The results show the effectiveness of the approaches proposed FTC
Yedes-Bougatef, Naima. "Commande sous contraintes des systèmes discrets périodiques". Thesis, Poitiers, 2012. http://www.theses.fr/2012POIT2305/document.
Texto completo da fonteThis thesis deals with the analysis and the control problem of periodic linear discrete systems (PLDS). The contributions presented in this work focuses on the constrained control of PLDS. Conditions for stability analysis and positivity are established in terms of strict LMI (Linear Matrix Inequalities). The stabilization of PLDS under the condition that the closed-loop system is positive and stable is addressed as well as the case of bounded state and/ or control variables. The obtained results are then extended to the synthesis of robust state feedback controllers, where some of which are based on the S − procedure technique. Furthermore, some conditions of stability and stabilization of PLDS with delays are established. The problem of stabilization of constrained PLDS is addressed based on the Lyapunov techniques or the Linear Programming techniques. The robust H∞ state feedback control in which both robust stability and a prescribed H∞ performance are required is investigated
Hirwa, Serge. "Méthodes de commande avancées appliquées aux viseurs". Phd thesis, Supélec, 2013. http://tel.archives-ouvertes.fr/tel-00969110.
Texto completo da fonteGassmann, Vincent. "Commande décentralisée robuste de systèmes d'entraînement de bandes à élasticité variable". Strasbourg, 2011. http://www.theses.fr/2011STRA6010.
Texto completo da fonteArias, César. "COOPER, H. H. A., Diez Ensayos sobre el Common Law - Editorial Universo, Lima, 1967, 238 pp". Pontificia Universidad Católica del Perú, 2015. http://repositorio.pucp.edu.pe/index/handle/123456789/116364.
Texto completo da fonteMehmel, Cherif. "Modélisation et commande d'un interféromètre pour la détection d'ondes gravitationnelles". Chambéry, 1998. http://www.theses.fr/1998CHAMS021.
Texto completo da fonteMustaki, Simon Éliakim. "Outils de pré-calibration numérique des lois de commande de systèmes de systèmes : application aux aides à la conduite et au véhicule autonome". Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2019. http://www.theses.fr/2019IMTA0142/document.
Texto completo da fonteThis thesis deals with the tuning of the new Advanced Driving Assistance Systems (ADAS). The development of these systems has become nowadays a strategic line of research for the automotive industry towards the conception of safer and fuel-efficient vehicles.This thesis contributes to a multi-criterion, multi-modeland multi-scenario methodological vision of the tuning process. It is presented through a specific application of the tuning of the Lane Centering Assistance (LCA). It relies on vehicle and environment’s dynamical models of adequate complexity in the aim of formalizing and managing, in a H2/H∞ framework, the trade-off between performance, comfort and robustness. The formulated criteria are easy to compute and defined in a way to be understandable, closely linked to practical specifications. The whole methodology is driven by the research of a pertinent trade-off between realism (being as closest as possible to reality) and complexity (quick evaluation of the criterion). The efficiency and the robustness of the approach is demonstrated through high-fidelity simulations and numerous tests on real vehicles
Benlatreche, Adlane Abdelkader. "Contribution à la commande robuste H∞ de systèmes à grande échelle d’enroulement de bandes flexibles". Université Louis Pasteur (Strasbourg) (1971-2008), 2007. https://publication-theses.unistra.fr/public/theses_doctorat/2007/BENLATRECHE_Adlane_Abdelkader_2007.pdf.
Texto completo da fonteIn web transport systems, the main concern is to control independently speed and tension in spite of perturbations such as radius variations and changes of set point. Nevertheless, in these control techniques, tracking properties and perturbation rejection are interdependent and cannot be specified separately. In this thesis, we first present multivariable decentralised H∞ controllers with one or two degrees of freedom (DOF), with and without explicit integrator, applied to winding systems. Different controller structures are then considered: centralised and semi-decentralised controllers with or without overlapping. The 2DOF approach improves significantly the disturbance rejection while reducing the coupling between tension and velocity. The use of decentralised control leads to performance deterioration as compared to centralised control. The off-diagonal elements of the plant are represented as uncertainties. This enables to analyse the stability of a decentralised control structure. Finally, multivariable H∞ controllers are presented, with and without integrator, applied to winding systems and determined by a bilinear matrix inequality (BMI) approach. This method consists in designing state feedback control with the use of BMI optimisation. Insertion of full or partial integral action is discussed. Simulation results are given based on a nonlinear model identified on a 3-motor winding test bench. Experimental results have also been obtained on this setup
As'ad, Kamel. "Élaboration d'une stratégie de commande h-infini à plusieurs degrés de liberté : poursuite et rejet de perturbations". Nancy 1, 1993. http://www.theses.fr/1993NAN10033.
Texto completo da fonteBarakat, Abdallah Mouhammad. "Contribution à l'amélioration de la régulation de tension des générateurs synchrones : nouvelles structures d'excitation associées à des lois de commande H∞". Poitiers, 2011. http://nuxeo.edel.univ-poitiers.fr/nuxeo/site/esupversions/2eaed395-fb76-4af0-adf9-9db22d125dba.
Texto completo da fonteThe research works presented in this dissertation deals with the improvement of the voltage regulation of synchronous generator during the load variation. The excitation structure and the associated control strategy are two main factors that influence the dynamic behavior of synchronous generators. The industrial excitation system is based on the brushless excitation structure combined with an analogue or digital PID voltage controller. By replacing the industrial controller with an H∞ digital controller, a remarkable improvement in the system performance was obtained. Because of industrial structure limitations, we have developed new excitation structures that allow direct control of the synchronous generator main field current. The structures are based on exciter machine (wound field synchronous machine or permanent magnet machine) with a thyristor bridge or a diode one with a buck converter. The proposed structures combined with the H∞ control give the best results in terms of stability, voltage drops and overshoots, and response time
Poinard, Franck. "Méthode d'identification fréquentielle et commande robuste de type H∞ d'un procédé d'élaboration de monocristaux". Lyon 1, 1995. http://www.theses.fr/1995LYO10180.
Texto completo da fonteChaib, 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.
Texto completo da fonteIn 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
Choulak, Samir Eddine. "Modélisation et Commande d'un procédé d'Extrusion Réactive". Phd thesis, Université Claude Bernard - Lyon I, 2004. http://tel.archives-ouvertes.fr/tel-00116677.
Texto completo da fonteLa modélisation a été réalisée en adoptant une démarche mixte alliant l'aspect mécanique des milieux continus à celui du génie des procédés. Le schéma d'écoulement intrinsèquement à paramètres distribués, est approché par une cascade de réacteurs parfaitement agités avec reflux. Les caractéristiques de l'écoulement sont issues de la mécanique des fluides. Le modèle global est alors obtenu en écrivant sur chaque RCPA de la cascade les bilans d'énergie sur la matière, les fourreaux et les vis puis les bilans de masse globaux et par espèce.
Cette étape de modélisation a été suivie par une phase d'analyse dans le but de simplifier les phénomènes les moins influents sur l'évolution des variables d'état du procédé (température, pression, viscosité,...) puis par une étape de réduction de modèle.
Enfin, la synthèse de la loi de commande a été effectuée à partir du linéarisé autour d'un point de fonctionnement de ce modèle réduit. La technique de commande utilisée a été la synthèse Hinf, avec modèle de référence sur la trajectoire en viscosité. Cette synthèse a abouti à une loi de commande satisfaisante fonctionnant à la fois sur le modèle linéarisé mais aussi sur le modèle complet non linéaire au voisinage du domaine de fonctionnement.
Gasmi, Noussaiba. "Observation et commande d'une classe de systèmes non linéaires temps discret". Thesis, Université de Lorraine, 2018. http://www.theses.fr/2018LORR0177/document.
Texto completo da fonteThe 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
Bompart, Vincent. "Optimisation non lisse pour la commande des systèmes de l'aéronautique". Toulouse 3, 2007. http://thesesups.ups-tlse.fr/76/.
Texto completo da fonteModern 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
Mansouri, Mejda. "Observation et commande des systèmes de grande dimension". Phd thesis, Université de Lorraine, 2012. http://tel.archives-ouvertes.fr/tel-00808649.
Texto completo da fonteZerrougui, Mohamed. "Observation et commande des systèmes singuliers non linéaires". Phd thesis, Université Henri Poincaré - Nancy I, 2011. http://tel.archives-ouvertes.fr/tel-00705339.
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