Dissertations / Theses on the topic 'Contrôle direct du couple'
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Zolghadri, Mohammad Reza. "Controle direct du couple des actionneurs synchrones." Grenoble INPG, 1997. http://www.theses.fr/1997INPG0160.
Full textMartins, Carlos de Almeida. "Contrôle direct du couple d'une machine asynchrone alimentée par convertisseur multiniveaux à fréquence imposée." Tese, Toulouse, INPT, 2000. http://hdl.handle.net/10216/11690.
Full textMartins, Carlos de Almeida. "Contrôle direct du couple d'une machine asynchrone alimentée par convertisseur multiniveaux à fréquence imposée." Doctoral thesis, Toulouse, INPT, 2000. http://hdl.handle.net/10216/11690.
Full textBelhadj, Jamel. "Commande directe en couple d'une machine asynchrone : structures d'observations : application aux systèmes multimachines-multiconvertisseurs." Toulouse, INPT, 2001. http://www.theses.fr/2001INPT002H.
Full textChapuis, Yves André. "Controle direct du couple d'une machine asynchrone par l'orientation de son flux statorique." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0006.
Full textAbouda, Salim. "Contribution à la commande des systèmes photovoltaiques : application aux systèmes de pompages." Thesis, Reims, 2015. http://www.theses.fr/2015REIMS005/document.
Full textThe aim of the work presented in this thesis is to contribute to the study of a photovoltaic system operating at its maximum power and energetically autonomous. The case studied in this thesis relates to the control of a chain of photovoltaic pumping in an isolated site. In this sense and for the PV system operates at its maximum power, it must include a converter associated with a MPPT algorithm. In our study, we used two MPPT algorithms, the algorithm “Perturb and Observe” (P & O), then the algorithm “Increment of Conductance” (IncCond). In some industrial applications, it is sometimes necessary to maintain the voltage delivered by the PV system constant. For this, a control system of this voltage is presented. The methods used for the simulation of this system are based on the use of a PID controller and the sliding mode control, and finally a fuzzy logic controller. This system was tested for a resistive load then for the case of a centrifugal pump driven by a permanent magnetic DC motor. Then we studied the case of a pumping chain using a three-phase induction motor as a drive motor. In order to be able to regulate the flow of water, the Direct Torque Control method “DTC” is used to control the speed of the induction motor because it is proportional with the water flow
El, Hassan Ismail. "Commande haute performance d'un moteur asynchrone sans capteur de vitesse par contrôle direct du couple : filtrage de Kalman étendu du vecteur d'état : contrôle de la fréquence de commutation de l'onduleur." Toulouse, INPT, 1999. http://www.theses.fr/1999INPT009H.
Full textIdjdarene, Kassa. "Contribution à l’étude et la commande de génératrices asynchrones à cage dédiées à des centrales électriques éoliennes autonomes." Thesis, Lille 1, 2010. http://www.theses.fr/2010LIL10124/document.
Full textThe work of this thesis aims to study the squirrel cage induction machine in the context of the wind energy conversion in isolated locations. After a brief review of the concepts of converting wind energy into electrical energy, this document describes the state of the art of different solutions used in both the mass production electrical field than in the supply of isolated sites. The secondchapter is dedicated to the modelling of squirrel cage induction machine. As the linear model presents limitations, a new and simple model, in which the saturation phenomenon is taken into account by a magnetizing inductance function of the magnetizing current, was developed. The parameters of this model can be obtained from tests or numerical approach using 2D FEM. The proposed modelling tools are then used to study the performance of stand alone induction generators connected to capacitive bank and balanced and unbalanced loads. The simulation results are validated experimentally on a test bench. The last part of the thesis is devoted to comparison of two techniques for controlling the induction generator, self-feeding a PWM rectifier (Vector Control, Direct Torque Control). The purpose of these techniques is to maintain a constant voltage at the output of the rectifier whatever the loads and speeds. This voltage is then adapted by the inverter to the good magnitude and frequency for a use in isolated areas. For each technique, two strategies were tested (at constant flux and variable flux depending on speed). The simulation results showed the effectiveness of these techniques and the interests and limitations of each
Naassani, Ahmad Ammar. "Controle direct du couple et du flux de la machine asynchrone essai de synthese au moyen de la theorie du mode de glissement." Cachan, Ecole normale supérieure, 2001. http://www.theses.fr/2001DENS0016.
Full textCimuca, Gabriel-Octavian. "Système inertiel de stockage d'énergie associé à des générateurs éoliens." Phd thesis, Paris, ENSAM, 2005. http://pastel.archives-ouvertes.fr/pastel-00001955.
Full textArcker-Hissel, Anne-Marie. "Contrôle direct du couple électromagnétique de machines asynchrones de grande puissance : alimentation par onduleurs de tension à 2-niveaux ou 3-niveaux (NPC) : observation à structure variable de la vitesse mécanique : réalisations expérimentales en techniques numérique et analogique." Toulouse, INPT, 1999. http://www.theses.fr/1999INPT005H.
Full textYou, Xianli. "Contrôle numérique effectif du couple d'une machine à courant continu : système à couple programmable." Grenoble INPG, 1987. http://www.theses.fr/1987INPG0123.
Full textSharif, Ariane. "Contrôle du phénotype astrocytaire par le couple TGFα-EGFR." Paris 6, 2005. http://www.theses.fr/2005PA066636.
Full textSharma, Sushank. "Transition laminaire turbulent dans les couches limites supersoniques : différents scénarios et contrôle possible Control of oblique-type breakdown in a supersonic boundary layer employing streaks Turbulent flow topology in supersonic boundary layer with wall heat transfer Laminar-to-turbulent transition in supersonic boundary layer : : Effects of initial perturbation and wall heat transfer Effect of thermo-mechanical non-equilibrium on the onset of transition in supersonic boundary layers." Thesis, Normandie, 2019. http://www.theses.fr/2019NORMIR16.
Full textDirect numerical simulations (DNS) of both adiabatic and isothermal (heated and cooled) supersonic boundary layers are performed. Two different transition scenarios, namely the Oblique-type breakdown and the By-pass transition are presented in detail. For the oblique-type transition scenario, the results show that the control modes with four to five times the fundamental wavenumber are beneficial for controlling the transition. In the first region, after the control-mode forcing, the beneficial mean-flow distortion (MFD) generated by inducing the control mode is solely responsible for hampering the growth of the fundamental-mode. Globally, the MFD and the three-dimensional part of the control contribute equally towards controlling the oblique breakdown. Effects of physical parameters like wall-temperature, perturbation intensity and baseflow are investigated for the By-pass transition. The results regarding the by-pass scenario reveal that increasing the perturbation intensity moves the transition onset upstream and also increases the length of the transition region. Additionally, below 1% perturbation levels, wall-cooling stabilizes the flow while inverse happens at higher values. The existence of the thermo-mechanical non-equilibrium advances the onset of transition for the heated cases while the cooled wall behaves in the opposite sense. The analyses of the turbulent boundary layer show that the thermal factors influence the topology and inclination of the vortical structures. Moreover, regarding the heat flux, different transfer process is dominant in the near-wall region for the cooled wall
Nguyen, Ngoc Linh. "Predictive control of two synchronous machines in parallel supplied by a standard three phase static converter." Phd thesis, Toulouse, INPT, 2013. http://oatao.univ-toulouse.fr/9906/1/nguyen.pdf.
Full textNjeh, Mohamed. "Contribution au contrôle des pulsations de couple d'une propulsion hybride." Poitiers, 2011. http://nuxeo.edel.univ-poitiers.fr/nuxeo/site/esupversions/df030f33-74b2-48ca-a265-d7a9aaebe169.
Full textThe research presented in this PhD thesis concerns the development of new control strategies to attenuate the insanteneous torque ripples of a hybrid diesel/electric propulsion. On a diesel engine, torque ripples are quasiperiodic for a given rotational speed. We present two strategies to control fixed and variable speed to reduce torque ripples. In the first approach, the state model is expressed in a rotating frame at the frequency of the harmonic rejection. This particular model leads to consider a harmonic ripple as a exogenous constant signal. This control strategy is based on a dynamic output feedback synthesis. The second approach is based on internal model control. The controller has a copy of the exogenous disturbance of the model. This is a problem of persistent disturbance rejection and reference tracking. We will adapt these approaches for control of variable speeds. In this case, the system models and controllers are with varying parameters (Linear Parameter Varying). We present a synthesis method based on S-procedure and full-block multipliers to solve the problem of output feedback. These strategies are applied to an experimental benchmark consists of mono-cylinder diesel engine coupled to a permanent magnets synchronous machine
Gauthier, Jean-Philippe. "Contrôle actif des ondulations de couple appliqué à la propulsion hybride." Mémoire, Université de Sherbrooke, 2007. http://savoirs.usherbrooke.ca/handle/11143/1382.
Full textJustin, Joël. "Étude du couple stratégie-outil de contrôle de gestion : méthodologie et cas." Bordeaux 4, 2001. http://www.theses.fr/2001BOR40010.
Full textToufayli, Laila. "Stabilisation polynomiale et contrôlabilité exacte des équations des ondes par des contrôles indirects et dynamiques." Phd thesis, Université de Strasbourg, 2013. http://tel.archives-ouvertes.fr/tel-00780215.
Full textKamoun, Lotfi. "Contrôle numérique direct des processus de fermentation par microordinateur." Paris 11, 1985. http://www.theses.fr/1985PA112107.
Full textMontesino, Stéphane. "Simulations numériques directes du contrôle d'écoulements turbulents par forçages électromagnétiques." Université Joseph Fourier (Grenoble), 2009. http://www.theses.fr/2009GRE10097.
Full textThis thesis deals with electromagnetic turbulent flow control and its promissing naval applications like flow separation prevention and drag reduction. It is mostly an academic approach using Direct Numerical Simulations (D. N. S. ) of turbulent channel flow. Electromagnetic actuators are made with ``Wall flushed'' electrodes and ``sub-surface'' magnets. They can generate local volumic Lorentz forces within a sea-water turbulent boundary layer. The originality of this study comes from the computation of electromagnetic forces taking account of the geometry of electrodes and magnets with an analytical method based on electric and magnetic fluxes conservation. The present study is mainly focused on the parallel electromagnetic actuator whose magnets and electrodes are parallel to each other. This actuator that generates a quasi-unidirectional force, is aligned in the spanwise or streamwise direction of a turbulent channel flow. The objectives of this research is the diminution of the required power of an active control to reduce the drag. Direct numerical simulations are performed in order to obtain a better understanding of the drag reduction mecanism caused by spanwise oscillating or streamwise propulsive electromagnetic forcing
Rosset, Marie-Minerve. "Gestion thermique optimale d'un bâtiment : contrôle d'un chauffage à faible inertie, contrôle des échanges extérieurs." Paris 11, 1986. http://www.theses.fr/1986PA112067.
Full textThis thesis evaluates the advantages of a good thermal control of a building during the heating season. The aims nowadays are: 1) to bring down running costs by taking advantage of both solar energy and off-peak energy rates ; 2)to improve comfort by preventing excessive temperature oscillations. "Simple-Zone" and "Simple Energy-Source” cases are studied with the view to minimizing energy costs and discomfort. When control free, the thermal system (the building) is of linear type, but here two kinds of controls are used: a low inertia heater delivering instant power, and a mobile insulation device (shutter); there-fore the thermal system (building + heater + shutter) is modelized by a nonlinear low dimension state equation. In the first part of this work, only the action of the low inertia heater is taken into account. Modelization in this case results in a degenerated linear-quadratic equation with control constraints, whose optimization leads to better quality comfort. With intermittent occupation and off-peak energy rates, running costs can be cut by up to 25 %. In most realistic meteorological situations, optimal heating management does not anticipate on future meteorological inputs and therefore makes little use of the heat storage capacity of the building. The second part of this wok deals with a two dimension optimal control problem (i. E. Heater and shutters), which is a singular non-linear one, with control constraints. The insulation component of the control is shown to be "bang-bang", thus reducing heating optimization to a linear-quadratic type problem. In the case of a low inertia wall, optimal management of shutters, allows trapping of solar energy during mead season, while reducing night energy lasses, whereas thermal walls (i. E. High inertia walls) are efficient even in winter
Heintz, Benoît. "Électronique embarquée pour un actionneur adapté au contrôle d'interaction." Mémoire, Université de Sherbrooke, 2010. http://savoirs.usherbrooke.ca/handle/11143/1552.
Full textAfsharnia, Saeed. "Contrôle vectoriel des machines synchrones à aimants permanents : identification des paramètres et minimisation des ondulations de couple." Vandoeuvre-les-Nancy, INPL, 1995. http://docnum.univ-lorraine.fr/public/INPL_T_1995_AFSHARNIA_S.pdf.
Full textMuntean, Adina Mariana. "Analyse et contrôle du couple des moteurs synchrones à aimants permanents pour la propulsion des véhicules électriques." Besançon, 2007. http://www.theses.fr/2007BESA2007.
Full textThe aim of this thesis is to analyze and control the developed electromagnetic turque of an interior permanent-magnet synchronous motor (IPMSM) for electric vehicle (EV) propulsion applications. The thesis content is structured on six chapters. Chapter 1 outlines the main features of an electric-vehicle propulsion system. After proving that the general class of PMSMs is well suited to such drive applications, some specific IPMSM subclass designs for EV propulsion are examined. Chapter 2 develops the mathematical model of IMPSMs suitable for EV propulsion applications. In the first part of chapter 3, an equivalent magnetic circuit-based analysis of a double--layer IPMSM is developed allowing the estimation of the rotor-PM sizes as well as the ratued valuers of PM-rotor and armature-stator fluxes, back-emfs and insatured dq inductances. In ther second of the chapter, the electromagnetic torque of both single- and double-layer IMPSMs under rated-load condition is analyzed using 2D finite-element field simulation. Chapter 4 deals with electromagnetic torque control strategies for IMPSMs. In the first part of this chapter, the indirect torque control of IMPSM via stator-current regulation in the rotor reference frame is outlined. The second part of the chapter is dedicated to the direct torque and stator-flux control (DTFC) of IMPSM for EV propulsion. Chapter 5 presents the experimental study on the indirect (via stator-current regulation) torque control and on the DTFC of a double-layer IMPSM prototype. In the last chapter, general conclusions oof the thesis research are drawn, and some suggestions are given for the future work in the same area
Losero, Rémi. "Contrôle en couple et en vitesse du glissement d'un embrayage simple ou double dans une transmission automobile." Thesis, Valenciennes, 2016. http://www.theses.fr/2016VALE0005/document.
Full textThis PhD has been done in an industrial framework with the so-called automotive equipment manufacturer Valeo and the laboratory of Automatic Control, Mechanics, Informatics and Human Sciences LAMIH UMR CNRS 8201 of Valenciennes, France. The issues of this PhD are closed to the industrialization context such as the clutch torque estimation during the gear shifting phases in a dual clutch transmission and the clutch slip speed control. In order to solve the inline clutch torque estimation issues, a virtual torque sensor has been developed. On one hand, this virtual sensor is composed of a shaft torsion angle estimation based on a method of virtual tooth adding into the encoder sensors. On another hand, discrete angular domain unknown input Takagi-Sugeno observer is used for the estimation of the dynamic part of transmitted torque. This methodology has permitted the estimation of the transmitted clutch torque of a dual clutch transmission in simulation. The simulation results have been obtained on a simulation platform provided by Valeo, including a complete vehicle model. The methodology has also been tested on real data of a dual mass flywheel angular deflection. Thus, online estimation of instantaneous acyclic engine torque and transmitted clutch torque has been obtained. Concerning the slip control, a robust control strategy against the external disturbances leaded to the driver and the system parameters incertitude has been developed. This strategy permits to ensure the required specifications in simulation. The strategy has been also validated on vehicle during track trials
Faci, Salim. "Contrôle optique direct de dispositifs et circuits micro-ondes : application aux oscillateurs." Paris 6, 2007. http://www.theses.fr/2007PA066427.
Full textLLor, Ana Maria Rétif Jean-Marie Arnalte Santiago. "Control directo de par a frecuencia de modulacion constante de motores sincronos de imanes permanentes ommande directe de couple à fréquence de modulation constante des moteurs synchrones à aimants permanents /." Villeurbanne : Doc'INSA, 2004. http://docinsa.insa-lyon.fr/these/pont.php?id=llor.
Full textThèse rédigée en espagnol. En fin de thèse, résumé succint des chapitres en français. Titre provenant de l'écran-titre. Bibliogr. p. 243-247.
Zhang, Qin. "Estimation du couple généré par un muscle sous SEF à la base de l'EMG évoquée pour le suivi de la fatigue et le contrôle du couple en boucle fermée." Phd thesis, Université Montpellier II - Sciences et Techniques du Languedoc, 2011. http://tel.archives-ouvertes.fr/tel-00820474.
Full textZhang, Xiang Qin. "Estimation du couple généré par un muscle sous SEF à la base de l’EMG évoquée pour le suivi de la fatigue et le contrôle du couple en boucle fermée." Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20191/document.
Full textFunctional electrical stimulation (FES) has the potential to provide active improvement to spinal cord injured (SCI) patients in terms of mobility, stability and side-effect prevention. In the domain of lower limb FES system, elicited muscle force must be provided appropriately to perform intended movement and the torque generation by FES should be accurate not to lose the posture balance. However, muscle state changes such as muscle fatigue is a major cause which degrades its performance. In addition, most of the complete SCI patients don't have sensory feedback to detect the fatigue and in-vivo joint torque sensor is not available yet. Conventional FES control systems are either in open-loop or not robust to muscle state changes. This thesis aims at a development of joint torque prediction and feedback control in order to enhance the FES performance in terms of accuracy, robustness, and safety to the patients.In order to predict FES-induced joint torque, evoked-Electromyography (eEMG) has been applied to correlate muscle electrical activity and mechanical activity. Although muscle fatigue represents time-variant, subject-specific and protocol-specific characteristics, the proposed Kalman filter-based adaptive identification was able to predict the time-variant torque systematically. The robustness of the torque prediction has been investigated in a fatigue tracking task in experiment with SCI subjects. The results demonstrated good tracking performance for muscle variations and against some disturbances.Based on accurate predictive performance of the proposed method, a new control strategy, EMG-Feedback Predictive Control (EFPC), was proposed to adaptively control stimulation pattern compensating to time-varying muscle state changes. In addition, this control strategy was able to explicitly avoid overstimulation to the patients, and conveniently generate appropriate stimulation pattern for desired torque trajectory
Menu, Christian. "Machines synchrones à FEM trapézoïdales : autopilotage et contrôle de couple numériques : étude et simulation de différentes stratégies de commande." Grenoble INPG, 1989. http://www.theses.fr/1989INPG0062.
Full textLi, Zhan. "Nouvelle modalité de contrôle en boucle fermée de l'activation musculaire et prédiction en ligne du couple musculaire sous SEF." Thesis, Montpellier 2, 2014. http://www.theses.fr/2014MON20095/document.
Full textFunctional electrical stimulation (FES) is one of existing rehabilitationtechniques to restore lost motor functions for motor-impaired subjects. Thestimulator generates electrical pulses to drive artificial contractions of theparalysed muscles, through activating intact motor units. Currently open-loopFES system is the most frequently used. The data acquired from the open-loop FESwould help researchers to make off-line analysis for evaluating performance ofFES systems. However, it should go through a trial and error manner, which isfar from facilitating a implementation of real-time closed-loop FES system.In this thesis, we propose and develop a method for real-time EMG-feedback torqueprediction and muscle activation control toward new modality in FES.The evoked electromyography (eEMG) which can reflect electrical muscleactivities under FES, is involved in both offline and real-time FES-inducedtorque estimation and muscle control systems. FES-induced joint torque can beestimated/predicted with eEMG by employing both Kalman filter and NonlinearAuto-Regressive with Exogenous (NARX) type recurrent neural network (RNN). Theforgetting factor of Kalman filter should be properly selected in advance andalso with proper computational settings. It is a limitation for some casesespecially when we do not have prior knowledge of new subject regarding expectedmuscle response intensity induced by FES. The proposed NARX-RNN does not sufferfrom such computational setting problems and also shows better estimation/prediction performances than that of Kalman filter.Evoked EMG based torque estimator is exploited from off-line situation toonline real-time system. Recursive Kalman filter and NARX-RNN are implementedfor real-time torque estimation/prediction with evoked EMG. The performance wasverified both in able-bodied and spinal cord injured subjects. Furthermore, real-time EMG-feedback muscle activation control in FES system is developed togetherwith wireless Vivaltis stimulator for specifying directly muscle activationinstead of conventionally specifying stimulation pattern.Toward natural multiple muscles control with multi-channel FES, muscle synergyconcept was introduced for inverse estimation of muscle activations from desiredjoint moment. The averaged synergy ratio was applied for muscle activationestimation with leave-one-out cross validation manner, which resulted in 9.3%estimation error over all the subjects. This result supports the common musclesynergy-based neuroprosthetics control concept. By combining this inverse estimation of muscle activations together with real-time EMG-feedback muscle activation control, it would open a new modality toward muscle synergy-basedmulti-muscle activation control in FES
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
Pamiès, Mathieu. "Contrôle d'une couche limite turbulente au moyen d'un micro-sytème distribué." Thesis, Lille 1, 2008. http://www.theses.fr/2008LIL10081/document.
Full textThe rising cost of oil leads most of transportation firms to work towards reducing the fuel consumption of their vehicles. ln aeronautical applications, they mainly focus on viscous drag reduction. which gives hope to considerable power savings. The approach followed in the present work aims at manipulating the turbulent features responsible for the friction force. Located in the turbulent part of boundary layers. they consist in coherent vortices. whose characteristic time and space scales are costly to reach experimentally and numerically. This work postulates that only a high level of realism could help to predict accurately the performance of coherent vortices-based drag control methods. It is therefore taken into account at three stages of the design of our flow control simulation. which are the choice of the Reynolds number, the control algorithm and the actuating system. First of all, the simulation of high Reynolds number spatial boundary layers is often limited by computing capacities. Thanks to an optimization of existing inflow boundary conditions, current work helps to reduce CPU cost and widens the field of reachable flow conditions. Secondly, two improvements of the well-known oppositiol control have been proposed to allow its experimental adaptation. They are assessed using large-eddy simulation (LES) at a reasonable cost. Finally, a realistic MEMS is mode lied and used to manipulate the fine turbulent structures in the vicinity of the wall. Real influence on drag as well as precise interaction mechanisms are described using direct numerical simulation (DNS). Efficiency parameters are identified and possible ways of improvement are indicated
Tackett, Sarah Lefevre. "Personality and Relationship Satisfaction: Evaluating the Direct Associations Between Neuroticism, Agreeableness, Extraversion, and Relationship Satisfaction in Romantic Couple Relationships." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2723.
Full textBenlamine, Raouf. "Etude et réalisation d'une machine électrique à forte densité de couple et fort rapport de sur-couple pour des applications de traction automobile." Thesis, Besançon, 2015. http://www.theses.fr/2015BESA2014/document.
Full textThe societal and environmental context in France and Europe during the last few years has been largely favorable to the electrification of transportation means, mainly vehicles, in order to reduce CO2 emissions. The authorities are working hard to make the electrified vehicles more affordable, by providing substantial premiums during the purchase of “clean” vehicles. For their part, the automakers are looking to reduce the cost of electric and hybrid electric vehicles by offering technical solutions that can reduce the manufacturing cost of the car components, mainly batteries, thermal and electric motors, while ensuring high performances. The main objective of this thesis is to study and realize an electric machine, which satisfies very restrictive specifications in terms of axial size and torque density in order to be used as a traction motor for a hybrid electric vehicle. In addition, this machine must be innovative, with a high reliability, low cost and automated manufacturing process. Thus, a state of art about the various electric machines has been achieved. Depending on the requirements of our application, an axial flux machine with buried permanent magnets and concentrated winding has been selected. Initially, a simplified analytical model has been developed and coupled to an optimization tool. The obtained geometrical and electrical parameters have been adjusted using a numerical model based on the 3D finite element. Various modifications have been applied to the initial machine due to the modification of the geometrical and performance specifications. Electromagnetic performances such as torque and power have been analyzed for various operating points. Losses in the permanent magnets have been calculated using a hybrid numerical 3D model based on the finite difference and finite element, which allows to reduce the computation time compared to transient 3D finite element. In order to validate the different results, a prototype of the machine has been realized. This machine has also been modeled using a quasi-3D magnetic equivalent circuits. This semi-analytical model is generic regarding the geometrical and electrical parameters, with an adaptive discretization. Furthermore, the saturation and the slotting effects have been taken into account. The magnetic flux density, the flux linkage and the electromagnetic torque have been calculated with this model, ensuring high accuracy and reduced time computation compared to 3D finite element
Sassi, Mohamed. "Résolution des problèmes direct et inverse pour la détermination et le contrôle des frontières mobiles." Lyon, INSA, 1997. http://www.theses.fr/1997ISAL0080.
Full textThe objective we have set ourselves for this these is to solve two problems dealing with the « moving boundary problems » : Direct problem : In this part, we have establish a relation called « Moknine equation», it gives us the ability to produce the exact solution of the moving boundary problems, the procedure consists of dividing the formulation into two ones, at the first the solution without accounting the discontinuity at the moving boundary is easily calculated, and eventually the final solution that corresponds to the discontinuity is concluded. To better illustrate the methodology, the case of solid liquid phase change problem is considered. Inverse problem: in order to govern a solidification process, the thermal parameters at the moving boundary are prescribed (velocity, thermal flux and the interface form), and the beat flux at the fix boundaries to makes the desired behaviour is estimated, the technical used to solve this inverse boundary problem is the space marching method. As a consequence, of the difficulties accounted to apply the Weber and M. Raynaud schemes due to the moving boundary, a new scheme is proposed. It is applied in the case of ID and 2D cases. It’s fiability is demonstrate through a numerical simulation
Oliveira, José Carlos Rodrigues de. "Contrôle d'un variateur asynchrone sans capteur de vitesse : estimation du flux, du couple et de la vitesse : réalisation de la commande numérique." Toulouse, INPT, 1991. http://www.theses.fr/1992INPT105H.
Full textSuréna, Anne-Laure. "Contrôle de l'activité du couple TGFα-EGFR dans les gliomes via la formation de complexes protéiques autour du précuseur transmembranaire du TGFα." Paris 6, 2009. http://www.theses.fr/2009PA066760.
Full textTan, Yang. "Transitions continues des tâches et des contraintes pour le contrôle de robots." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066096/document.
Full textLarge and sudden changes in the torques of the actuators of a robot are highly undesirable and should be avoided during robot control as they may result in unpredictable behaviours. Multi-objective control system for complex robots usually have to handle multiple prioritized tasks while satisfying constraints. Changes in tasks and/or constraints are inevitable for robots when adapting to the unstructured and dynamic environment, and they may lead to large sudden changes in torques. Within this work, the problem of task priority transitions and changing constraints is primarily considered to reduce large sudden changes in torques. This is achieved through two main contributions as follows. Firstly, based on quadratic programming (QP), a new controller called Generalized Hierarchical Control (GHC) is developed to deal with task priority transitions among arbitrary prioritized task. This projector can be used to achieve continuous task priority transitions, as well as insert or remove tasks among a set of tasks to be performed in an elegant way. The control input (e.g. joint torques) is computed by solving one quadratic programming problem, where generalized projectors are adopted to maintain a task hierarchy while satisfying equality and inequality constraints. Secondly, a predictive control primitive based on Model Predictive Control (MPC) is developed to handle presence of discontinuities in the constraints that the robot must satisfy, such as the breaking of contacts with the environment or the avoidance of an obstacle. The controller takes the advantages of predictive formulations to anticipate the evolutions of the constraints by means of control scenarios and/or sensor information, and thus generate new continuous constraints to replace the original discontinuous constraints in the QP reactive controller. As a result, the rate of change in joint torques is minimized compared with the original discontinuous constraints. This predictive control primitive does not directly modify the desired task objectives, but the constraints to ensure that the worst case of changes of torques is well-managed. The effectiveness of the proposed control framework is validated by a set of experiments in simulation on the Kuka LWR robot and the iCub humanoid robot. The results show that the proposed approach significantly decrease the rate of change in joint torques when task priorities switch or discontinuous constraints occur
Cattan, Elie. "Analyse de la latence et de sa compensation pour l'interaction au toucher direct : aspects techniques et humains." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAM039/document.
Full textLatency, the delay between a user input on a system and the corresponding response from the system, is a major issue for the usability of interactive systems. In direct-touch interaction, latency is particularly perceivable and alters user performance even at levels in the order of ten milliseconds. Yet, current touch devices such as smartphones or tablet-pc exhibit in general latencies over 70 ms.Our goal is to improve the knowledge on latency (its causes, its effects) and to find strategies to compensate it or to decrease its negative effects. We present a review of the HCI literature on the topic, then we link this literature with the motor control research field that has studied human behaviour when facing visuomotor perturbations, and in particular the adaptation to feedback delay.We then present our four contributions. We contribute both in a practical and a theoretical manner to the problem of latency in direct-touch interaction. Two of our contributions supplement the diagnosis of latency: the first one is a new latency measurement technique; the second one is a study of the impact of latency on bimanual interaction, which is important when interacting on large tactile surfaces. We show that bimanual interaction is as much affected by latency as a single hand interaction, suggesting that more complex tasks, suppose to increase the cognitive load, do not necessarily reduce the effect of latency. Our two other contributions address the reduction of the effects of latency. On one hand, we introduce a low latency system (25 ms) associated with a predictive software compensation, and we show that the system enables users to improve their performances as if they were using a system with 9 ms of latency. On the other hand we study users' ability to adapt to latency in order to improve their performance on a tracking task, and we show that the negative impact of latency is reduced with long-term training thanks to human adaptability
Allieri, Francesca. "Contrôle direct et indirect des stéroïdes gonadiques sur le système vasopressinergique des noyaux limbiques de cerveau des rongeurs." Paris 6, 2008. http://www.theses.fr/2008PA066530.
Full textThe steroid’s sensitive arginin-vasopressinergic system (AVP) is an excellent model to study the regulation of neural circuits related to social behaviours. The extrahypothalamic parvocellular AVP system is sexually dimorphic in a variety of vertebrate models. In a previous study I demonstrated that the absence of estradiol (E2), as in ARKO mice determines a strong decrease of AVP-ir fibers and parvocellular AVP neurons of the BST-amygdala system of ARKO mice. Studies performed on different neural circuits, suggested that also T and its androgenic metabolites could have a prominet role in the differentiation of sexually dimorphic circuits. The aim of this thesis was evaluate the role of androgens in the differentiation of the sexually dimorphic parvocellular AVP system and the possible double control (direct and undirect) on the AVP system. To demontate the role of androgens in the differentiation of the AVP parvocellular system I compared the AVP-ir system of male and female Tfm rats. To understand the efects of E2, on the AVP I treated ARKO mice with DHTP+EB and ARKO male and femae with E2 in the perinatal period. Depression and anxiety are under estrogenic control. I demonstate the effect of the lack of serotonin and noradrenalin on the AVP expression. The data propose a new view on the actions of gonadal steroids on the AVP system. Sexual steroids control the development of the AVP system, androgens masculinize the circuits. E2 is fundamental for the development of the AVP system. Serotonin and noradrenalin regulate the AVP expression. E2 operate a double control on the AVP limbic system
Abdellatif, Meriem. "Continuité de service des entraînements électriques pour une machine à induction alimentée par le stator et le rotor en présence de défauts capteurs." Thesis, Toulouse, INPT, 2010. http://www.theses.fr/2010INPT0107/document.
Full textThe development of closed loop controls for electrical drives requires the sensor installations in order to get feed back information. Nevertheless, any occurred sensor fault (current sensor,speed/position sensor,…) shows an operation system deterioration which leads in most cases to its shut down. This consequence is in contrast to industrial expectations especially concerning the system high accuracy that they are asking for. Statistic studies point out the sensor faults as frequent. So, it is necessary to find out solutions ensuring the system service continuity in case of any sensor fault. Firstly, the study presented in this work shows the used sensor technologies in order to understand both of the reason and the kind of occurred faults. Secondly, the studied system is presented which is an electrical drive based on a Doubly Fed Induction Machine (DFIM) operating in motor mode and connected to the grid by two inverters. The control developed is a Direct Torque Control (DTC). The control validation, in healthy operating mode, is realised throw simulation and experimentally. After, a study considering alternative current sensor and speed/position sensor faults are achieved. The developed algorithms are based on signal estimation, on a Fault Detection Isolation (FDI) and reconfiguration algorithms. In fact, they are simple to carry out, they don't need much hardware resources for implementation and their execution time is short. Finally, the experimental validation of the developed algorithms shows their efficiency. The system continues working even in presence of a sensor fault. Thus, the obtained control becomes a fault tolerant control thanks to these algorithms
Huguet, Charles. "Optimisation du couple revêtement anti-adhérent / matériau de creuset pour la cristallisation du silicium photovoltaïque - Application au moulage direct des wafers de Si." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00845703.
Full textDiallo, Alpha Oumar II. "Modélisation et optimisation du contrôle de l’encéphalite japonaise au Cambodge." Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTG067/document.
Full textJapanese encephalitis (JE) is a viral zoonotic disease and it is the leading cause of human encephalitis in Asia and the Pacific. Japanese encephalitis virus (JEV) is a Flavivirus of the family of Flaviviridae transmitted from animals to human by mosquitoes, direct transmission between pigs can occur via direct contact. Despite a significant decline in JE cases in many countries as a result of vaccination programs, JE continues to have a significant impact in Asia. Our objective in this thesis is to (i) built a mathematical model of the transmission dynamics of JEV, (ii) parameterize this model to determine the importance of direct transmission between pigs under field conditions (iii) and determine control strategies. We developed a propagation model of JEV. Next, we adapted this model to have two models incorporating vector-borne transmission alone or a combination of vector-borne and direct transmission. Our findings suggest that direct transmission between pigs does contribute to transmission dynamics of JEV in Cambodia; although, alone direct transmission cannot sustain an outbreak. Finally, we considered vector control, sow vaccination, and herd management to determine control strategies to eradicate JEV in pig herds, reduce sow abortions, assess the risk for human beings living in the vicinity of pig herds and near pig slaughterhouse, and the cost-effectiveness of vaccination. Our results confirm that vector control is the best way to control JEV. Vaccination of pregnant sows reduces abortions as expected. Paradoxically, if the vector control is medium the effectiveness of the vaccination could be compromised. Herd management has a low impact on incidence and abortions, therefore on JE control. Combining sow vaccination and vector control could be an alternative and/or an additional measure to human vaccination to reduce both JE incidence in humans and the economic impact of JE infection on pig breeding
Allias, Jean-François. "Dimensionnement d’un actionneur pour organe de pilotage à entraînement direct avec redondance passive magnétique." Phd thesis, Toulouse, INPT, 2015. http://oatao.univ-toulouse.fr/15101/1/Allias_JeanFrancois_INPT.pdf.
Full textEL, MOUCARY CHADY. "Contribution a l'etude de commandes directes du couple et du flux de la machine a induction comparaison de methodes de commande - utilisation du concept des sous-espaces de regulation des sorties - mise en uvre de controles directs linearisants." Paris 11, 2000. http://www.theses.fr/2000PA112170.
Full textDing, Tingting. "Etude et optimisation de machines à aimant permanent à démarrage direct sur le réseau." Thesis, Nancy 1, 2011. http://www.theses.fr/2011NAN10012/document.
Full textIn the context of reducing emissions of greenhouse effect, and of energy cost, the competition to improve the performances of the equipments affects all the domains. The consumption of electricity is mostly due to the electric motors, and particularly induction machines, used in various devices such as pumps, fans or compressors. These machines are characterized by relatively low efficiencies, and their replacement by more efficient machines should lead to a significant power saving. The Line-Start Permanent Magnet motors are good candidates to achieve this purpose. They have higher efficiencies and the additional devices for self-start eliminates the need of static converters, as it is normally required for conventional permanent magnet motors. Specific constraints arise for the use and the design of these machines: the starting current should not be so high to avoid the risk of the demagnetization of magnets and the starting torque must be large enough to ensure the start under load. Moreover, the efficiency and power factor at full load must be sufficiently higher than those of asynchronous machines in order to make them more competitive. In this thesis, we study three rotor structures to meet a given specification. These three structures use magnets inserted on the surface, embedded in a solid rotor or a cage rotor. They have their advantages and drawbacks that we have shown by a comparative study in some detail. This comparative study could not be implemented without the development of models in both static and dynamic conditions of these machines and a specific design methodology. A small scale of prototype has been designed, built and tested in the laboratory; it confirms the basic principles of such machines
Depeyras, Delphine. "Contrôles actifs et passifs appliqués à l'aérodynamique automobile." Thesis, Bordeaux 1, 2009. http://www.theses.fr/2009BOR13874/document.
Full textIn the present environmental urgency, the european community which is alive to the air quality and fossil resources rarefaction determines a clear and ambitious objective to the car makers for the greenhouse gas emissions. The carbon gas discharges will not exceed 120g/km for the year 2015 and probably 90g around the year 2018. The thesis work lies within this urgent dynamics of the carbon dioxide emissions. It is question of reducing the aerodynamic drag of the order of 20% to manage to the environmental limits of the year 2015 and also to better understand the vortex dynamics in order to improve the control solutions. In practical terms, it consists in coupling two flow control methods : a passive control with a wall modification using porous media and an active control with the use of blowing and/or sucking actuators at the car back wall. The study is lead in 2D for the square back Ahmed body and next in 3D for the Ahmed body with a rear window inclined at 25° with a direct resolution of the Navier-Stokes equations
Chaari, Kacem. "Mise au point d'une stratégie optimale de conduite des procédés de fermentation par contrôle numérique direct (et en temps réel)." Compiègne, 1987. http://www.theses.fr/1987COMPI263.
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