Dissertations / Theses on the topic 'Commandes robustes/adaptatives'
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Xu, Shi Jie. "Contribution à la commande robuste et adaptative : application aux robots manipulateurs." Nancy 1, 1995. http://www.theses.fr/1995NAN10313.
Full textConstantinescu, Aurelian. "Commande robuste et adaptative d'une suspension active." Grenoble INPG, 2001. http://www.theses.fr/2001INPG0130.
Full textOuattara, Seydou. "Mise en œuvre d'une loi de commande adaptative floue indirecte." Valenciennes, 1996. https://ged.uphf.fr/nuxeo/site/esupversions/34633a72-0657-4c61-8628-c72bea21021e.
Full textAntoinette, Patrice Luc. "Techniques de robustesse et d'auto-séquencement pour la commande auto-adaptative des aéronefs." Thesis, Toulouse, ISAE, 2012. http://www.theses.fr/2012ESAE0018/document.
Full textMany linear methods exist to design a robust controller for an uncertain linear system. This thesis considered the situation where the range of possible values of parameters is "very large" in relation to "small" variations in the desired level of performance. Frequently, an increase in robustness is obtained at the expense of a performance loss. The use of scheduled controllers may be an innovative way to address this problem. The implementation of this solution requires the controller has at its disposal the parameters on which the scheduling is done. However, it may occur that making the measure of the parameters available is not desired (for example, because of practical implementation aspects) or not possible. In these situations, the designer of the controller is led to estimate these parameters and then to use the paradigm of adaptive control. This thesis explored a methodology for designing an adaptive controller in which to solve the problem of robust control for an uncertain linear plant. A theoretical study was first undertaken which aimed to propose such a methodology; followed by, a study of the case of an unstable airplane as an application. Such an analysis highlighted the benefits that the proposed strategy can bring to the control for an uncertain plant
Giri, Fouad. "Convergence et robustesse en commande adaptative indirecte." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37613938g.
Full textIkhouane, Fayçal. "Commande adaptative non-linéaire. : Synthèse Robuste et Analyse Transitoire." Caen, 2001. http://www.theses.fr/2001CAEN2043.
Full textOuddah, Nadir. "Commande robuste de machines à réluctance variable pour la traction de véhicules électriques." Thesis, Cergy-Pontoise, 2015. http://www.theses.fr/2015CERG0789.
Full textThe switched reluctance motor (SRM) is gaining much interest in electric vehicle applications. It includes robustness to harsh operational conditions, rugged structure, fault tolerant operation and a wide range of speed. However, due to the highly nonlinear electromagnetic characteristic, wear and tear of motor, manufacturing tolerances and parameters drift during operation, classical control strategies do not ensure high dynamical performance and robustness under various operating conditions in electric vehicle environment. In this context, the first purpose of this thesis is to propose robust control strategies of the SRM taking into account the constraints imposed by electric vehicle applications. To achieve this objective, a cascade control scheme is adopted; it consists of an outer speed loop and an inner current loop. Controllers design aims are fixed through specifications formulated in frequency domain, robust and adaptive controllers of speed and currents are thus synthesized based on H- infini and LPV/H- infini control approaches. Feasibility of these controllers is also an important criterion in electric vehicles applications where embedded computing power is very limited. This criterion is taken into account in this thesis by using fixed order controller synthesis approaches. The performances of these controllers are analyzed and compared with the performances of standard H- infini controllers through an experimental evaluation and a robustness analysis is performed using the concept of the Singular Structured Value, i.e. the μ-analysis. The second objective of this thesis is to assess the interest of the sensorless control of SRM. Robust observers based on second order sliding mode (SMO2) and Kalman filtering techniques (EKF) are designed to estimate the mechanical states of SRM. Performances and robustness of these observers are then compared experimentally in perspective of electric vehicle application
Hussain, Ayman. "Contribution à la commande adaptative robuste par modes glissants." Reims, 2008. http://theses.univ-reims.fr/exl-doc/GED00000994.pdf.
Full textThis thesis aims to develop a family of adaptive robust sliding modes for a large class of non-linear uncertain and disturbed. Two control laws were developed. In the first, the model system has been reformed such that all the unknown dynamics are combined in one function and then use a single approximation. In this context, fuzzy wavelet networks were first used thanks to their rapid convergence but they don’t give good results in the presence of uncertain linguistic information. To resolve this, a fuzzy system of type-2 was used. To ensure robustness against external disturbances, uncertainty and approximation errors, the sliding mode has been proposed. To reduce the stresses at the start of the signal, a non-linear was introduced. The control law is built to ensure the robustness and overall stability of the closed system in addition to it’s capacity of eliminating the phenomenon of chattering in the case of classical sliding mode. However, the choice of the gains of the sliding surface becomes complicated for systems of order greater than 2. To overcome this problem, a new control law using sliding mode has been proposed. The main advantage of this approach is that the sliding surface has been modified so that the approach has been removed which makes the system more robust and increases its speed of convergence to the reference signal. .
Hussain, Ayman Zaytoon Janan Hamzaoui Abdelaziz. "Contribution à la commande adaptative robuste par modes glissants." Reims : S.C.D. de l'Université, 2008. http://scdurca.univ-reims.fr/exl-doc/GED00000994.pdf.
Full textCanart, Régis. "Contribution à la commande adaptative et prédictive." Lille 1, 1997. http://www.theses.fr/1997LIL10143.
Full textMartin, Alain. "Commande adaptative robuste. Application au controle des engins en tungage." Nice, 1988. http://www.theses.fr/1988NICE4346.
Full textRAYNAUD, HENRI. "Etude et applications de la robustesse de la commande adaptative." Paris 11, 1990. http://www.theses.fr/1990PA112039.
Full textFerrères, Gilles. "De l'utilisation des outils de robustesse pour la commande adaptative." Grenoble INPG, 1995. http://www.theses.fr/1995INPG0008.
Full textZerkaoui, Salem. "Commande neuronale adaptative des systèmes non linéaires." Le Havre, 2007. http://www.theses.fr/2007LEHA0010.
Full textThe main contribution of this work is to propose a robust stable self-adaptive InDirect neural Network Control "IDNC" to control a broad variety of unknown linear, nonlinear, SISO and MIMO systems. The control scheme is made of an adaptive instantaneous neural model, a neural controller and an on-line parameter updating law. The IDNC parameters start at zero initial conditions which ensure that the performances do not depend on the initialization phase. Closed loop performances as well as sufficient conditions for asymptotic stability and robustness are derived from the Lyapunov approach. The simulations and experimental tests are carried out in order to validate the performances of the proposed approach. In particular, our contribution is used for the control of the Tennessee Eastman Challenge Process and a medical robot. Also, the proposed structure can easily be implemented in several practical applications
Duque, Escobar Ismael Mauricio. "Contribution à la mise en oeuvre de la commande adaptative." Grenoble INPG, 1989. http://www.theses.fr/1989INPG0007.
Full textZadshakoyan, Mohammad. "Optimisation en conduite d'usinage et gestion d'usure d'outils par commande adaptative." Bordeaux 1, 1998. http://www.theses.fr/1998BOR10544.
Full textCarrillo, Francisco Javier. "Sur la stabilité et la robustesse de la commande adaptative directe multivariable." Grenoble INPG, 1987. http://www.theses.fr/1987INPG0034.
Full textCarrillo, Romero F. Javier. "Sur la stabilité et la robustesse de la commande adaptative directe multivariable." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37603645q.
Full textLAVAL, 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.
Full textJiang, Zhong-Ping. "Quelques resultats de stabilisation robuste. applications à la commande." Phd thesis, École Nationale Supérieure des Mines de Paris, 1993. http://pastel.archives-ouvertes.fr/pastel-00838279.
Full textDinh, 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.
Full textBoultifat, Chaouki Nacer. "Contrôle acoustique actif du bruit dans une cavité fermée." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2019. http://www.theses.fr/2019IMTA0134/document.
Full textThis thesis deals with active noise control (ANC) in a cavity. The aim is to mitigate the effect of a disturbing sound wave at some points or in a volume. This is achieved using ananti-noise generated, for example, by a loudspeaker. This study requires the use of dynamic models that report changes in pressure at points of interest in response to exogenous noises. Such models can be obtained by frequency identification of point-to-point responses or by using the underlying physical model (wave equation). In the latter case, the search for a low-complexity model (finite dimensional model) is often a prerequisite for the conceptual study of an active control system. The contributions of this thesis concern the development of different simplified models parameterized by the spatial position for acoustic systems, and the design of control laws for noise attenuation. The first part of the thesis is dedicated to the development of various simplified models of acoustic propagation system within a cavity. For that, the simplifications envisaged can be of spatial nature as much as frequential. We show in particular that it is possible, under certain conditions, to approximate the 3D system by a 1D system. This has been demonstrated experimentally on the prototype system, LS2NBox. The second part of the thesis deals with the design of control laws. First, the control strategies commonly used for ANC are compared. The effect of multi-objective H control at different spatial positions close to the attenuation points is analyzed. The possibility of perfect noise cancellation at one point is also discussed
Leduc, Harmonie. "Contrôle adaptatif robuste. Application au contrôle d'attitude de satellites." Thesis, Toulouse, INSA, 2017. http://www.theses.fr/2017ISAT0022/document.
Full textThis manuscript deals with robust direct adaptive control, and its application to CNES microsatellites attitude control. After listing the different types of time-varying controllers, we recall the characteristics of direct adaptive control. In particular, we recall that the knowledge of a stabilizing static output feedback is sufficient to design a direct adaptive controller. In parallel, we introduce the descriptor system theory. Modelizing a system into descriptor form is not usual but fits well with robust direct adaptive control. Starting from existing results about adaptive control and descriptor system theory, we provide an LMI based method which allows to compute, with the knowledge of a stabilizing static output feedback, the parameters of a stabilizing direct adaptive controller. A first result proves that the adaptive controller is at least as robust as the static output feedback. The second result allows to prove improved robustness at the expense of relaxing stability of the equilibrium point to practical stability, that is convergence to a neighborhood of the equilibrium. Then, we provide a method, LMI based as well, which allows to design a robust direct adaptive controller which has a better level of rejection of the perturbations than the static output feedback from which it is designed. All these theoretical results are applied to the attitude control of CNES microsatellites. We design a controller which stabilizes the attitude of the satellite whatever the value of its inertia. This attitude controller can also avoid the satellite reaction wheels to saturate. We design another robust adaptive attitude controller which has a better level of rejection of the perturbations than the static controller which is currently implemented aboard CNES satellites. Finally, we validate all the results of this manuscript by simulating on a AOCS CNES simulator the deployment of the satellite masts and some guiding jumps
Airimitoaie, Tudor-bogdan. "Commande robuste et calibrage des systèmes de contrôle actif de vibrations." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00767979.
Full textVorwald, 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 textAirimitoaie, Tudor-Bogdan. "Commande robuste et calibrage des systèmes de contrôle actif de vibrations." Thesis, Grenoble, 2012. http://www.theses.fr/2012GRENT015/document.
Full textIn this thesis, solutions for the design of robust Active Vibration Control (AVC) systems are presented. The thesis report is composed of two parts. In the first one, feedforward adaptive methods are developed. They are dedicated to the suppression of large band disturbances and use a measurement, correlated with the disturbance, obtained upstream from the performance variable by the use of a second transducer. The algorithms presented in this thesis are designed to achieve good performances and to maintain system stability in the presence of the internal feedback coupling which appears between the control signal and the image of the disturbance. The main contributions in this part are the relaxation of the Strictly Positive Real (SPR) condition appearing in the stability analysis of the algorithms by use of “Integral + Proportional” adaptation algorithms and the development of feedforward compensators for noise or vibration reduction based on the Youla-Kučera parameterization. The second part of this thesis is concerned with the negative feedback rejection of narrow band disturbances. An indirect adaptation method for the rejection of multiple narrow band disturbances using Band-Stop Filters (BSF) and the Youla-Kučera parameterization is presented. This method uses cascaded Adaptive Notch Filters (ANF) to estimate the frequencies of the disturbances' sinusoids and then, Band-stop Filters are used to shape the output sensitivity function independently, reducing the effect of each narrow band signal in the disturbance. The algorithms are verified and validated on an experimental setup available at the Control Systems Department of GIPSA-Lab, Grenoble, France
Mohammad, Sami. "Réalisation et commande robuste d'un système de rééducation physique." Phd thesis, Université de Valenciennes et du Hainaut-Cambresis, 2012. http://tel.archives-ouvertes.fr/tel-00747442.
Full textGonzalez, Karen Vanessa. "Modélisation et commande robuste des systèmes biologiques : exemple de la production d’acide lactique en fermenteur industriel." Thesis, Châtenay-Malabry, Ecole centrale de Paris, 2015. http://www.theses.fr/2015ECAP0044/document.
Full textThis PhD thesis focuses on the optimization of the bioprocess of lactic acid production from wheat flour. Indeed, lactic acid has received much attention for the production of PLA (Poly Lactic Acid), a biopolymer, since different inexpensive raw material such as wheat flour are now used as carbon source for its production. This work was performed in three main steps. In the first step, an innovative wheat transformation process is proposed, whose main steps are the following: a liquefaction followed by a simultaneous saccharification, proteins hydrolysis (SSPH) and and a final simultaneous saccharification, proteins hydrolysis and fermentation (SSPHF). Secondly, the modeling of the SSPHF (limiting step) in a continuous bioreactor is considered. The determination and validation of model parameters is performed by means of experimental campaigns in a 5 L bioreactor.In the last step, the development of control strategies to maintain the process at its optimal operating point is considered. To do so, due to the absence of sensors for real-time measurement of the concentrations of key variables of the bioreactor, estimators of these concentrations and of the lactic acid production rate are first developed. Then, control strategies for regulating the lactic acid concentration at its optimal value are designed and compared in simulation. An adaptive control combining a state feedback linearizing control and an estimator of the lactic acid production rate is finally chosen to be experimentally validated on an instrumented reactor. This strategy showed good robustness features with respect to modeling mismatches and was able during experiments to increase twice the lactic acid productivity
Bhatti, Qamar Iqbal. "Conception robuste de structures assemblées par points de soudure." Thesis, Besançon, 2011. http://www.theses.fr/2011BESA2031.
Full textSpot welded structures must satisfy a large variety of performance characteristics including static, noise, vibration and harshness and crash, which are strongly influenced by the numbers and positions of the spot welds. Moreover, some spot welds may be missing when structures leave the assembly line or break during lifetime of vehicle, inducing large variations in the performance characteristics. The challenge is to find the best locations and number of spot welds to achieve the performance goals while taking into account the trade-offs between manufacturing cost and robust to uncertainty in reasonable time frame. An adaptive optimization procedure is proposed, which iteratively adds and removes spot welds to obtain the robust design efficiently. An iterative procedure is also proposed to obtain the info-gap robustness curve, which allows analyzing the impact of the loss of the most influential spot welds on performance. This leads to define a quality control procedure for a small number of spot welds to guarantee the performance of a population of nominally identical structures within acceptable limits. All the methodologies are validated on a full industrial body-in-white of a vehicle.In practice, the design must satisfy several stringent and conflicting objectives simultaneously. Thus, we extend the adaptive procedure to handle multi-objective problems using the weight-sum approach reflecting the importance given to individual spot welds to obtain efficient solutions in the objective space. Finally, we propose a strategy to optimize the vibro-acoustic behavior of the passenger cabin of a vehicle by designing the numbers and positions of the spot welds
Harmouche, Mohamed. "Contribution à la théorie de la commande par modes glissants d'ordre supérieur et à la commande des systèmes mécaniques sous-actionnés." Thesis, Belfort-Montbéliard, 2013. http://www.theses.fr/2013BELF0214/document.
Full textNonlinear systems are so diverse that generalized tools for control are difficult to develop. Nonlinear control theory requires rigorous mathematical analysis to justify its conclusions. This thesis addresses two distinct, yet important branches of nonlinear control theory: control of uncertain nonlinear systems and control of under-actuated systems.In the first part, a class of Lyapunov-based robust arbitrary higher order sliding mode (HOSM) controllers is developed for the control of uncertain nonlinear systems. This class of controllers is based on a class of controllers for finite-time stabilization of pure integrator chain, and requires the limits of the system uncertainty to be known a-priori. Then, in order to eliminate the dependence on the knowledge of these limits, an adaptive arbitrary HOSM controller is developed. Using this new class, a universal homogeneous arbitrary HOSM controller is developed and it is shown that the homogeneity degree can be manipulated to obtain additional advantages in the proposed controllers, such as bounded control, minimum amplitude of discontinuous control and fixed time convergence. The performance of the controllers has been demonstrated through simulations and experiments on a fuel cell system.In the next part, the control of two under-actuated systems is studied. The first control problem is the global path following of car-type robotic vehicle, using target-point. The second problem is the precise tracking of surface marine vessels. Both these problems are distinct in nature; however, they are subjected to similar physical constraints. The solutions proposed for these control problems use saturated controls, taking into account the physical bounds on the control inputs. Simulations have been performed to demonstrate the performance of these controllers
Yao, Ziwen. "Régulateur adaptatif robuste pour les liaisons de transport a courant continu en haute tension." Vandoeuvre-les-Nancy, INPL, 1993. http://www.theses.fr/1993INPL051N.
Full textKubica, François. "Conception de lois de commande pour un avion souple." Toulouse, ENSAE, 1995. http://www.theses.fr/1995ESAE0017.
Full textCastellanos, Silva Abraham. "Compensation adaptative par feedback pour le contrôle actif de vibrations en présence d’incertitudes sur les paramètres du procédé." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENT050/document.
Full textIn this thesis, solutions for the design of robust Active Vibration Control (AVC) systems are presented. The thesis report is composed of two main parts.In the first part of the thesis uncertainties issues in Active Vibration Control systems are examined. In addition of the uncertainties on the frequency of the disturbances it has been found that the presence of low damped complex zeros raise difficult design problems even if plant and models are perfectly known. Solutions for the linear control in this context have been proposed. In order to reduce the uncertainties in the identification of low complex zeros and improved closed loop identification procedure has been developed. To handle the uncertainties on the disturbance frequency adaptation has any way to be used.The second part is concerned with the further development and/or the improvement of the now classical direct adaptive feedback compensation algorithms using Youla Kucera controller parametrization. Two new solutions have been proposed in this context. The first one results from the improvement of a previous work (Landau et al., 2005). The contributions are a new robust central controller design to the optional use of over parameterization of the Q-FIR filter which aims to ensure a small waterbed effect for the output sensitivity function and therefore reducing the unwanted amplification. The second algorithm presents a mixed direct/indirect structure which uses a Q-IIR filter. The improvements are mainly the effect of the Q filter denominator, which is obtained from a disturbance identification. This solution in addition drastically simplifies the design of the central controller.The algorithms have been tested, compared and validated on an international benchmark setup available at the Control System Department of GIPSA-Lab, Grenoble, France
Durantin, Cédric. "Métamodélisation et optimisation de dispositifs photoniques." Thesis, Université Côte d'Azur (ComUE), 2018. http://www.theses.fr/2018AZUR4036/document.
Full textNumerical simulation is widely employed in engineering to study the behavior of a device and optimize its design. Nevertheless, each computation is often time consuming and, during an optimization sequence, the simulation code is evaluated a large number of times. An interesting way to reduce the computational burden is to build a metamodel (or surrogate model) of the simulation code. Adaptive strategies are then set up for the optimization of the component using the metamodel prediction. In the context of this thesis, three representative devices are identified for applications that can be encountered within the CEA LETI optics and photonics department. The study of these cases resulted in two problems to be treated. The first one concerns multifidelity metamodeling, which consists of constructing a metamodel from two simulations of the same component that can be hierarchically ranked in accuracy. The simulations are obtained from different approximations of the physical phenomenon. The work on this method for the case of the photoacoustic cell has generated the development of a new multifidelity surrogate model based on radial basis function. The second problem relate to the consideration of manufacturing uncertainties in the design of photonic devices. Taking into account the differences observed between the desired geometry and the geometry obtained in manufacturing for the optimization of the component efficiency requires the development of a particular method for the case of the adiabatic coupler. The entire work of this thesis is capitalized in a software toolbox
Liu, Xinyi. "Contribution to adaptative sliding mode, fault tolerant control and control allocation of wind turbine system." Thesis, Belfort-Montbéliard, 2016. http://www.theses.fr/2016BELF0295/document.
Full textThe main challenges for the deployment of wind energy conversion systems (WECS) are to maximize the amount of good quality electrical power extracted from wind energy over a significantly wide range of weather conditions and minimize both manufacturing and maintenance costs. Wind turbine's efficiency is highly dependent on environmental disturbances and varying parameters for operating conditions, such as wind speed, pitch angle, tip-speed ratio, sensitive resistor and inductance. Uncertainties on the system are hard to model exactly while it affects the stability of the system. In order to ensure an optimal operating condition, with unknown perturbations, adaptive control can play an important role. On the other hand, a Fault Tolerant Control (FTC) with control allocation that is able to maintain the WECS connected after the occurrence of certain faults can avoid major economic losses. The thesis work concerns the establishment of an adaptive control and fault diagnosis and tolerant control of WECS. After a literature review, the contributions of the thesis are:In the first part of the thesis, a nonlinear uncertain model of the wind energy conversion system with a doubly fed induction generator (DFIG) is proposed. A novel Lyapunov-based adaptive Sliding Mode (HOSM) controller is designed to optimize the generated power.In the second part, a new output integral sliding mode methodology for fault tolerant control with control allocation of linear time varying systems is presented. Then, this methodology has been applied in order to force the wind turbine speed to its optimal value the presence of faults in the actuator
Matraji, Imad. "Contribution à la commande non linéaire robuste des systèmes d'alimentation en air des piles à combustible de type PEM." Phd thesis, Université de Technologie de Belfort-Montbeliard, 2013. http://tel.archives-ouvertes.fr/tel-00983443.
Full textHamerlain, Mustapha. "Commande hiérarchisée à modèle de référence et à structure variable d'un robot manipulateur à muscles artificiels." Toulouse, INSA, 1993. http://www.theses.fr/1993ISAT0013.
Full textZhang, Lei. "Contribution to robust and adaptive control and observation of linear induction machine : High order sliding mode approach." Thesis, Bourgogne Franche-Comté, 2018. http://www.theses.fr/2018UBFCA010.
Full textDynamic end effects play an important role in the Linear Induction Machine (LIM) control. They increase significantly the nonlinearity of the machine model and generate several difficulties to control and observe states with good performances. This thesis addresses three distinctissues: LIM robust control, LIM speed and flux estimation and observer-based robust control using higher order sliding mode theory.In the first part, to achieve speed and flux tracking,Super Twisting Controller (STC), Adaptive Super Twisting Controller (ASTC), and Adaptive Twisting Controller (ATC) were proposed and implemented into LIM system with great performance, i.e. finite time convergence and robustness properties. Among them, STC ensures continuous control with finite time convergence of the error to zero despite disturbances, under the assumption that their bounds are known. ATC and ASTC can deal with unknown bounded disturbance thanks to their adaptive properties.In the second part, a novel simplified LIM model was proposed and its observability has been proved. Then, Second Order Sliding Mode Observer (SOSMO) and Adaptive High Order Sliding Mode Observer (HOSMO) were proposed to estimate LIM speed, only by using the measured stator voltages and stator currents. SOSMO observer is based on the super twisting algorithm and its stability has been proved with Lyapunov’s theory, which can guarantee finite time convergence with less chattering. Adaptive HOSMO strategy combines speed adaptive algorithm and HOSMO method together to estimate rotor fluxes and speed simultaneously.In the third part, the LIM is viewed as two second order subsystems. Moreover, only the speed and the flux are supposed to be measured. Based on that two differentcontrollers based on HOSMO were presented in order to achieve flux and speed tracking. In both controllers, the idea of active disturbance rejection control is applied. Hence, the HOSMO is used to estimate the derivatives of the flux and the speed, as well as the disturbance. Then, in order to deal with the uncertainty in the measured variables, two different SM controllers are proposed. Firstly, the TC is applied in the LIM. However, the control signal in this case is discontinuous. Then, in order to provide a continuous control signal, the TC is replaced with STC. The stability and convergence of proposed TC-HOSMO and STC-HOSMO approaches were given and simulation validated their performances
Manrique, Espindola Dolly Tatiana. "Commande optimale d’une voiture électrique à faible consommation sous contraintes temps réel." Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0198/document.
Full textIn the field of transportation, the research on energy efficiency has been carried out for few decades by the automotive industry, where one of the main objectives is to reduce the energetic consumption. This particular problem can be rephrased as how the vehicle must be driven so that the minimum quantity of energy is used. This is the optimal driving strategy. In this project, a suitable model of the Vir'volt electric vehicle involved in the European Shell Eco-Marathon is obtained. The unknown parameters involved in the vehicle dynamics are estimated using Parameter identification from experimental data. The identified dynamics is used to derive an optimal driving strategy that is intended to be tracked on-line during the driving task. The tracking task is subject to time-varying polytopic constraint on the input and/or the state. A MPC-based tracking strategy that uses an homothetic transformation as a suitable time-varying invariant set is used. The time-varying invariant set guarantees the asymptotic stability of the control law. The problem of the MPC tracking for Linear Parametric Varying (LPV) systems is introduced. A new explicit MPC strategy for LPV systems is developed. This strategy uses a Parameter dependent Lyapunov Function (PDLF) to involve explicitly the time-varying parameter in the control law and so it reduces conservatism. A benchmark is used to test the performances of the optimal driving strategy and the explicit MPC tracking strategy. Finally, a robust adaptive technique with on-line identification of the dynamics is has been proposed and tested in the race showing good performances of the adaptive driving strategy
Yan, Xinming. "Development of robust control based on sliding mode for nonlinear uncertain systems." Thesis, Ecole centrale de Nantes, 2016. http://www.theses.fr/2016ECDN0012.
Full textThis work deals with the development of control laws for nonlinear uncertain systems based onsliding mode theory. The standard sliding mode control approaches are state feedback ones, in which the sliding variable and its time derivatives are required. This first objective of this thesis is to propose high order sliding mode control laws with a reduced use of sliding variable time derivatives. The contributions are made for the second and third order sliding mode control. The second objective is to combine the proposed control laws with a gain adaptation mechanism. The use of adaptive gain law allows to simplify the tuning process, to reduce the convergence time and to improve the accuracy. Finally, the applicability of the proposed approaches is shown on IRCCyN pneumatic benchmark. Applications are also made on 3DOF flying system
Dimassi, Habib. "Synchronisation des systèmes chaotiques par observateurs et applications à la transmission d'informations." Phd thesis, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00856590.
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