Tesi sul tema "Conception multiphysique"
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Ragot, Patrick. "Modélisation analytique multiphysique pour la conception optimale de moteurs synchrones à aimants permanents /". [S.l.] : [s.n.], 2008. http://library.epfl.ch/theses/?nr=4179.
Testo completoMakni, Zaatar. "Contribution au développement d'un outil d'analyse multiphysique pour la conception et l'optimisation d'actionneurs électromagnétiques". Paris 11, 2006. http://www.theses.fr/2006PA112232.
Testo completoThe present work concerns the development of a software tool for the design of electromagnetic actuators. The tool is based on a hybrid methodology associating analytical and numerical approaches. The association is carried out by coupling a commercial software tool (Pro@Desing) for analytical calculation, and a software under developement in the Laboratoire de Génie Electrique de Paris (LGEP) for numerical calculation using the Finite Element Method (FEM). The analytical approach uses a model which deals with global quantities and ensure an overall view of the behaviour of the coupled electromagnetic-thermal phenomena. It permits also to analyse the influence of the different geometrical parameters on the actuator outputs using an optimisation procedure. The temperature and dimensions of the different motor parts are calculated simultaneously. The strong coupled model is based on the materials constituve laws which make explicit the interdependence between electromagnetic and thermal phenomena. The numerical approach deals with local variables and informs about space-time variations of the various quantities. In the considered methodology, the numerical analysis is employed after the analytical one first to validate the analytical solution then to complete the design procedure. At last, the mechanical response of the actuator structure to the magnetic forces excitation is determined by a harmonic analysis. A weak coupled magneto-mechanical model based on the FEM is developed. It allows to benefit from the preciseness of finite element calculation without penalizing the calculation time
Malleron, Kevin. "Modélisation multiphysique, caractérisation et conception de transducteurs magnétoélectriques pour l'alimentation de capteurs biomédicaux autonomes". Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS203.
Testo completoIn order to avoid surgery for battery replacement or recharge, we propose to use an innovative technique to wirelessly recharge the battery using magnetoelectric materials. The magnetoelectric effect is issued of two combined phenomena: piezoelectricity and magnetostriction. The idea is to achieve a wireless power transmission based on the near magnetic field techniques: the source energy is emitted via a magnetic field and the receptor which will transduce the energy is a magnetoelectric material. The magnetostrictive part of the magnetoelectric transducer is subjected to a stress due to the magnetic field. The stress is transmitted to the piezoelectric part which will produce an electric field. The electric voltage collected from the electrodes of the piezoelectric material will be used to power or recharge electronic devices. This thesis contributes to the development of this technique by proposing improving ways for energy transmission to powering sensors with the smallest transducer possible. An 2D finite element model his presented with power measurements and the characterizing bench associated
Tinni, Amadou. "Modélisation multiphysique, reconception et optimisation d’une motopompe à rotor noyé". Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0103.
Testo completoCanned motor pumps are one of the safest ways to pump dangerous (radioactive, toxic), expensive and volatile fluids in nuclear and chemical fields. The canned motor pump is a compact unit integrating a hydraulic part and an induction motor with a common shaft. The special feature of the motor is that two non-magnetic cylindrical tube called “the can” are inserted into the air gap to seal the rotor from the stator windings. The pumped fluid passes through the air gap to cool the motor and lubricates the bearings. The new European standards on the motor efficiency (IEC standards), the increase in the service life of nuclear power plants in France, as well as the increased safety of the nuclear power plant installations after the Fukushima catastrophe are the reasons why canned motor pumps have to be designed with better efficiency and service life while fulfilling safety functions. The purpose of this PhD thesis is to develop a multiphysical model combining the electrical and thermal parts of canned motor to determine the efficiency and service life of canned motor. The reliability of the established multi-physical model has been validated by a comparison with the experimental test results carried out on different instrumented prototype motors. An analysis of the influence of parameters that determine the electrical and thermal performances of the canned motor was carried out and indications on the redesign of canned motor pumps were formulated to have motors with better efficiency and longer service life
Galisson, Grégoire. "Développement et mise en place d’une méthodologie de conception d’une architecture de simulation multiphysique en vue de la mise en place d’un jumeau numérique". Electronic Thesis or Diss., CY Cergy Paris Université, 2024. http://www.theses.fr/2024CYUN1329.
Testo completoThe electronic equipment design industry is undergoing rapid transformations, characterized by increasing demands for performance, stringent sustainability standards, and growing budgetary and environmental constraints. Numerical simulation has become essential to address these challenges, but it is often limited by a fragmented approach that does not integrate different physical domains. Thales SIX, operating in sectorssuch as Defense, Security, and Aeronautics, is particularly affected by these issues.This thesis proposes the development of a methodology for constructing multiphysical simulations, enabling the creation of Digital Twins. These Digital Twins, virtual representations of real systems, integrate various physical domains such as thermal, mechanical, and electromagnetic, aiming to optimize the design of complex products by considering the interactions between these domains.The research methodology is based on three main stages :1. Model-Based System Engineering (MBSE) : This phase involves creating a robust systemic architecture,led by a Systems Modeling Architect, to coordinate the various involved disciplines and ensure the coherence of the systemic approach.2. Model Reduction : An in-depth investigation of model reduction techniques is conducted to decrease the size of 3D simulations, essential for enabling fast and real-time evaluations.3. Multiphysical Coupling : This stage aims to coherently integrate the different physical aspects to create realistic simulations that accurately reflect the behavior of electronic equipment under various conditions.The results of this thesis demonstrate that the developed methodology can significantly improve the design processes of complex systems by validating physical architecture choices, enhancing system performance, and reducing development costs and time. It also offers promising perspectives for future research, such as the development of specific tools to include the new simulation architecture view in MBSE tools, simplifying the methodology, and evaluating it on more complex case studies.In conclusion, this thesis makes a significant contribution to research and engineering practices by proposing an innovative methodology for creating advanced multiphysical simulations, essential for addressing the technological and operational challenges in the electronic equipment design industry
Bouker, Hibatallah. "Conception et optimisation des machines synchrones à aimants permanents à haute vitesse dédiées aux véhicules électriques hybrides". Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLN064/document.
Testo completoThe work presented concern the analytical modeling and optimization of high speed permanent magnet synchronous machines for Hybrid Electric traction motor.However, such an application accumulates difficulties of electromagnetic, thermal and mechanical order. The first part is interested in establishing a state of the art of the high-speed applications’ particularities. Then, a simplified multiphysic and analytic modeling was implemented to conduct a first comparison between four kinds of PM rotors. This was based on a multi-objective optimization in order to optimize the delivery speed while improving the cycle efficiency. In order to achieve the desired performance, precise multiphysics interactions’ modeling was performed. Bolts opposing this improvement are well known and are mainly related to the compactness of the desired structures.The core of the proposed interactive modeling is the electromagnetic modeling which, using a reluctance network, allows to choose between two kinds of control: current control or voltage control. The high speed constraint requires serious interest to iron and mechanical losses. In this work, we are interested in developing a mechanical model which estimates the maximum speed which can be integrated easily into an optimization procedure. The model is then coupled with a particle swarm algorithm in order to involve the optimal sizing approach.These works join within the framework of the project ANR AAP TTD "e-MECA" (électromécanique Embarquée à Compacité Améliorée) where the partners are: Valeo (project leader), SKF, IFPEn, TEMPO, Dynfluid and SATIE
Petrichenko, Dmitry. "Contribution à la modélisation et à la conception optimale des turbo-alternateurs de faible puissance". Phd thesis, Ecole Centrale de Lille, 2007. http://tel.archives-ouvertes.fr/tel-00346766.
Testo completoAmmar, Karim. "Conception multi-physique et multi-objectif des cœurs de RNR-Na hétérogènes : développement d’une méthode d’optimisation sous incertitudes". Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112390/document.
Testo completoSince Phenix shutting down in 2010, CEA does not have Sodium Fast Reactor (SFR) in operating condition. According to global energetic challenge and fast reactor abilities, CEA launched a program of industrial demonstrator called ASTRID (Advanced Sodium Technological Reactor for Industrial Demonstration), a reactor with electric power capacity equal to 600MW. Objective of the prototype is, in first to be a response to environmental constraints, in second demonstrates the industrial viability of:• SFR reactor. The goal is to have a safety level at least equal to 3rd generation reactors. ASTRID design integrates Fukushima feedback;• Waste reprocessing (with minor actinide transmutation) and it linked industry.Installation safety is the priority. In all cases, no radionuclide should be released into environment. To achieve this objective, it is imperative to predict the impact of uncertainty sources on reactor behaviour. In this context, this thesis aims to develop new optimization methods for SFR cores. The goal is to improve the robustness and reliability of reactors in response to existing uncertainties. We will use ASTRID core as reference to estimate interest of new methods and tools developed.The impact of multi-Physics uncertainties in the calculation of the core performance and the use of optimization methods introduce new problems:• How to optimize “complex” cores (i.e. associated with design spaces of high dimensions with more than 20 variable parameters), taking into account the uncertainties?• What is uncertainties behaviour for optimization core compare to reference core?• Taking into account uncertainties, optimization core are they still competitive? Optimizations improvements are higher than uncertainty margins?The thesis helps to develop and implement methods necessary to take into account uncertainties in the new generation of simulation tools. Statistical methods to ensure consistency of complex multi-Physics simulation results are also detailed.By providing first images of innovative SFR core, this thesis presents methods and tools to reduce the uncertainties on some performance while optimizing them. These gains are achieved through the use of multi-Objective optimization algorithms. These methods provide all possible compromise between the different optimization criteria, such as the balance between economic performance and safety
Taha, Hoda. "Cοnceptiοn de moteurs à aimants permanents à flux axial ou radial à haute vitesse pour l'entraînement d". Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMLH25.
Testo completoThis thesis focuses on the design of high-speed, low-power permanent magnet motors specifically intended for driving a counter-rotating compressor. The primary objective is to ensure direct and compact integration of the motor, both in terms of length and volume, within the compressor wheels. To meet these requirements, several motor topologies—axial flux, radial 268 flux, and an innovative conical airgap structure—were modeled and evaluated. These evaluations included an in-depth analysis of electromagnetic and thermal performance, aimed at maximizing motor efficiency at high speeds. Particular attention was given to the study of electromagnetic losses, which become significant at these high speeds, for each of the considered topologies. In parallel, detailed mechanical analyses were conducted on disc-shaped rotors, which are sparsely documented in the literature, as well as on cylindrical rotors, to characterize their mechanical behavior at a rotational speed of 90,000 rpm. Manufacturing constraints ultimately led to the selection of the radial flux topology, which is currently under prototyping
Da, Silva Frédéric. "Méthodologies de réduction de modèles multiphysiques pour la conception et la commande d’une chaîne de traction électrique". Thesis, Université Paris-Saclay (ComUE), 2015. http://www.theses.fr/2015SACLC022/document.
Testo completoNumerical simulations are widely used during the design phase of a product but also for the validation of an innovative system. For example, during the conception of an electric vehicle’s powertrain, numerical simulations can be used to select the appropriate electric engine technology or for the development of control strategies taking into account decision criteria such as vehicle’s autonomy, but also its cost and performance.System’s complexity is always increasing, so they require more and more precise simulations in order to better understand the phenomena involved - for example to study iron losses in an electric engine. 3D simulations provide very accurate results to study a body but are still not appropriate today for the study of large scale systems (ie. with many degrees of freedom, many optimization parameters and several areas of Physics). Indeed, 3D simulations computing time cost is directly linked with the number of degrees of freedom. That’s why, in recent years, model order reduction techniques stir developments because they guarantee a good compromise between the computation time and accuracy of results produced by these models.In this study, we are interested in techniques that can be used in an industrial context around two axes: - the study of thermal phenomena (in the power electronics modules) - the study of electromagnetic phenomena (in electric engines)
Museau, Matthieu. "Un modèle pour l'intégration des couplages multiphysiques et la prise en compte de la fabricabilité au cours du processus de conception des microproduits". Phd thesis, Grenoble 1, 2008. http://www.theses.fr/2008GRE10293.
Testo completoMicroproduct design is a multidisciplinary task wlllch most of the lime rl'qulres 10 couple several physical princip les to obtain the right product behaviour. Various actors are involved throughollt the produet design process physical principles and manufacturing processes experts for instance. Theses actors have 10 collaborate in aecordanee wlth inlegraled deSign princlples lf1 order to design high-perÛ)rmance products along its entire life cycle. Product-model concept has been developed tor the design ofmacro products m order to enable the integration of the whole communitv of experts throughout the producl lifecycle. Therefore assessmg the rclevance oflhis ClJl1Cept to the design ofmicroproducts seems pertinent. To do so the limits existing models are first highlighted, as weil as the ll1tliculty ofaprh mg Ihem as a support for close collaboration between physical principal experts 1 and the conrrol ofmultiphysical coupling. L'hen the concepts requlred for Ihe claboration ofa nllcroproducts dedicated model are presented The implemented model and its application onto the design oftw[\ Inlcroproducts la MEMS switch RI and a microfluidie deYice) are finally presented and discussed
Museau, Matthieu. "Un modèle pour l'intégration des couplages multiphysiques et la prise en compte de la fabricabilité au cours du processus de conception des microproduits". Phd thesis, Université Joseph Fourier (Grenoble), 2008. http://tel.archives-ouvertes.fr/tel-00425084.
Testo completoMarques, Julien. "Plate-forme d'aide à l'éco-conception de systèmes multiphysiques : démarche énergétique pour la validation et la réduction de modèles". Phd thesis, Université d'Orléans, 2010. http://tel.archives-ouvertes.fr/tel-00587474.
Testo completoBoulzazen, Habib. "Contribution au développement d'un moyen d'essais CEM utilisant une Chambre Réverbérante à Brassage de Modes. Conception et Intégration d'une Enceinte Thermo-régulée pour Essais Multiphysiques". Phd thesis, Université de Rouen, 2011. http://tel.archives-ouvertes.fr/tel-00632372.
Testo completoDufour, Nicolas. "Conception et réalisation d'un multicapteur de gaz intégré à base de plateformes chauffantes sur silicium et de couches sensibles à oxydes métalliques pour le côntrole de la qualité de l'air habitacle". Toulouse 3, 2013. http://thesesups.ups-tlse.fr/2207/.
Testo completoMany recent studies have shown the presence of high amounts of pollutants inside the car cabin. The proposed solution for this problem is the development of a gas sensor capable of detecting pollutants entering in the vehicle, resulting in the closing of vents in the case of a pollution peak. Metal-oxides chemical micro-sensors are the best candidates to solve this problem: they are highly sensitive to many gases, fast response times, and their production cost is low. Their main drawback is a lack of selectivity. The research work consisted of developing a micro-device incorporating a gas multi-sensor array based on conductivity detection: different sensitive layers are integrated on a single silicon micro-machined chip, in order to selectively detect several gases: carbon monoxide (CO), carbon dioxide nitrogen (NO2), ammonia (NH3), acetaldehyde (C2H4O) and hydrogen sulfide (H2S). To do this, three main areas of research have emerged. The first part of this study focused on the design of the heating micro-platforms using a multiphysics simulations tool to optimize, on the one hand, their structure and geometry to achieve the expected thermal performances (thermoelectric efficiency optimization and minimizing interaction of a cell to another), and on the other hand, the thermo-mechanical performance given the possibility to use sensors in a fast thermal transient mode. The resulting model was validated by comparison with physical measurements. This has allowed us to improve the thermal behavior of the membrane surface and reduce manufacturing costs by simplifying the design. The manufacturing in clean room of the multisensor platform was then performed taking into account the improvements proposed by the modeling. A specific study on the integration process of an industrial technique to deposit sensitive materials by inkjet was conducted. A method for depositing quickly and at low costs several sensitive layers (ZnO, CuO and SnO2) on a single sensing structure has been developed. Finally, we proceeded to develop a decision-making system, including two elements: the development of an optimized profile to control the heating and sensitive resistors to improve the sensitivity, selectivity and stability, and a data multivariate analysis. It has therefore been possible to selectively detect most of the target gas (alone and mixed) at low concentrations (NO2-0. 2ppm, C2H4O-2ppm, NH3-5ppm and CO-100ppm)
Fleury, Benoît. "Comportement des supercondensateurs en environnement sévère et conception optimale d’alimentations hybrides embarquées aérospatiales". Thesis, Ecole centrale de Lille, 2013. http://www.theses.fr/2013ECLI0004/document.
Testo completoThe aim of this study is to develop an hybrid power supply using the complementarities between batteries and supercapacitors in order to improve the mass of electrical storage systems on aircrafts and spacecrafts.The study is divided into three parts: In the first part, a decision-making tool to develop a hybrid power supply given a mission profile is presented. Thanks to this tool, an estimation of the optimal mass of the hybrid power supply is done based only on the specific energy and the specific power of the sources.The second part is firstly composed of a synthesis of bibliography results on the internal behavior of supercapacitors; secondly an experimental test campaign is described. Its aim is characterizing, modeling and identifying the multiphysics behavior and ageing of supercapacitors on several commercial references. Those models are required for the fine sizing optimization of the hybrid power supply. Basing on the internal model of the sources, the aim of the third part of this study is to present the development of an hybrid architecture battery/supercapacitors which fulfills the electrical need for a specific application. This hybrid power supply takes dynamically advantage of the electrical sources at the maximum of their possibilities, but without overstressing them at the same time. Thanks to that, the aging rate of the sources and the failure rate of the system are limited
Dufour, Nicolas. "Conception et réalisation d'un multicapteur de gaz intégré à base de plateformes chauffantes sur silicium et de couches sensibles à oxyde métallique pour le contrôle de la qualité de l'air habitacle". Phd thesis, Université Paul Sabatier - Toulouse III, 2013. http://tel.archives-ouvertes.fr/tel-00956669.
Testo completoGarci, Maroua. "Simulation multi-physiques de circuits intégrés pour la fiabilité". Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAD020/document.
Testo completoThis thesis was carried out under the theme of the microelectronics Integrated Circuits Reliability. The aim of our work was to develop a multi-physics simulation tool for the design of reliable integrated circuits. This tool has the following innovative features : • (i) The integration in a standard microelectronics design environment, such as the Cadence® environment ;• (ii) The possibility of efficient simulation, over long periods, of analog CMOS circuits taking into account the aging henomenon ; • (iii) The simulation of multiple physical behaviours of ICs (electrical-thermalmechanical) coupled in the same environment using the direct simulation method. This work was carried out through three main stages detailed in the three parts of this Manuscript
Sleiman, Hussein. "Systèmes de suspension semi-active à base de fluide magnétorhéologique pour l'automobile". Phd thesis, 2010. http://pastel.archives-ouvertes.fr/pastel-00502171.
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