Дисертації з теми "Machine-À-Machine"
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Zhou, Kaijie. "Technique d'accès pour la communication machine-à-machine dans LTE/LTE-A." Thesis, Paris, ENST, 2013. http://www.theses.fr/2013ENST0076/document.
Повний текст джерелаMachine type communications is seen as a form of data communication, among devices and/or from devices to a set of servers, that do not necessarily require human interaction. However, it is challenging to accommodate MTC in LTE as a result of its specific characteristics and requirements. The aim of this thesis is to propose mechanisms and optimize the access layer techniques for MTC in LTE. For uplink access, we propose two methods to improve the performance of random access in terms of latency: a packet aggregation method and a Transmission Time Interval bundling scheme. To further reduce the uplink latency and enable massive number of connected device, we propose a new contention based access method (CBA) to bypass both the redundant signaling in the random access procedure and also the latency of regular scheduling. For downlink reception, we propose two methods to analyze the performance of discontinuous reception DRX mode for MTC applications: the first with the Poisson distribution and the second with the Pareto distribution for sporadic traffic. With the proposed models, the power saving factor and wake up latency can be accurately estimated for a given choice of DRX parameters, thus allowing to select the ones presenting the optimal tradeoff
Zhou, Kaijie. "Technique d'accès pour la communication machine-à-machine dans LTE/LTE-A." Electronic Thesis or Diss., Paris, ENST, 2013. http://www.theses.fr/2013ENST0076.
Повний текст джерелаMachine type communications is seen as a form of data communication, among devices and/or from devices to a set of servers, that do not necessarily require human interaction. However, it is challenging to accommodate MTC in LTE as a result of its specific characteristics and requirements. The aim of this thesis is to propose mechanisms and optimize the access layer techniques for MTC in LTE. For uplink access, we propose two methods to improve the performance of random access in terms of latency: a packet aggregation method and a Transmission Time Interval bundling scheme. To further reduce the uplink latency and enable massive number of connected device, we propose a new contention based access method (CBA) to bypass both the redundant signaling in the random access procedure and also the latency of regular scheduling. For downlink reception, we propose two methods to analyze the performance of discontinuous reception DRX mode for MTC applications: the first with the Poisson distribution and the second with the Pareto distribution for sporadic traffic. With the proposed models, the power saving factor and wake up latency can be accurately estimated for a given choice of DRX parameters, thus allowing to select the ones presenting the optimal tradeoff
Nguyen, Philippe. "Machine de vision à rétine intelligente." Paris 11, 1996. http://www.theses.fr/1996PA112011.
Повний текст джерелаChillet, Christian. "Machine synchrone multidisque à aimants permanents." Grenoble INPG, 1988. http://www.theses.fr/1988INPG0125.
Повний текст джерелаAudet, Réjean. "Simulation d'une sécherie de machine à papiers." Thèse, Université du Québec à Trois-Rivières, 1992. http://depot-e.uqtr.ca/5314/1/000598133.pdf.
Повний текст джерелаGharbi, Ghada. "Gestion autonomique d'objets communicants dans le cadre des réseaux machine à machine sous des contraintes temporelles." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30262.
Повний текст джерелаThe decrease in communication costs, the improvement of networks performance and the evolution of the dedicated services platforms managing multiple objects, led to the appearance of new practices and applications gathered under the designation of Machine-to-Machine communications (M2M). M2M systems have to integrate in a coordinated way various devices and software modules such as sensors, actuators, displays, middleware, etc. M2M expansion gives rise to extensive data exploitation, effective routing and reasoning mechanisms for an appropriate decision making and a coordinated control in a predictive and reactive way. This work aims to meet self-management challenges characterized by recent studies of autonomic computing. It deals with the modeling and the validation of M2M systems operating in a dynamic context and under a set of functional and non-functional properties, specifically temporal ones. To do so, we propose to rely on graph grammars and model checking related techniques. This allows to configure and to reconfigure a set of communicating objects by considering a set of constraints. First, we were interested in the validation at design time of M2M communications operating under temporal constraints. A verification and validation approach based on timed automata was proposed. A smart grid scenario was developed to validate the proposed model. This step is necessary, however it is not sufficient. Indeed, M2M systems are dynamic and verification at run time is important. To validate the execution of an M2M system, we focused on in its functional and temporal aspects. We referred to the European standard smartM2M to define an architectural style for M2M systems. This standard was selected for the following reasons: (1) its independence of the application domain and the objects' communication technology, (2) its broad scope and (3) its deployment on industrial systems. To validate the M2M system' functionalities, a multi-model approach was proposed: a first model, named functional, representing a real-time view of M2M system and a second model, named formal, based on a graph grammar incorporating the concepts of the functional layer. To conduct dynamic reconfiguration actions, graph transformation rules have been defined. Bi-directional communication mechanisms have been set up to maintain coherence between the real system and its models. A smart metering use case was developed to validate the proposed approach. With the aim of validating temporal properties of an M2M system during its execution, this approach has been extended with new concepts. We have defined a three-layers based approach to describe the features and temporal properties of an M2M system: an application layer which incorporates the concepts defined in the formal layer of the previous approach with extensions to express temporal properties between applications M2M, a service layer to describe the necessary components to meet the specification of the upper layer and infrastructure layer describing their deployment. An autonomic manager interacts with these layers to supervise and control the temporal behavior of the system. These layers are part of the autonomic manager knowledge base. The autonomic manager architecture and dynamic reconfiguration mechanisms were detailed. An eHealth scenario has been designed to illustrate the proposed approach
De, Boni Rovella Gastón. "Solutions de décodage canal basées sur l'apprentissage automatique pour les communications de type machine-à-machine." Electronic Thesis or Diss., Toulouse, ISAE, 2024. http://www.theses.fr/2024ESAE0065.
Повний текст джерелаIn this Ph.D. thesis, we explore machine learning-based solutions for channel decoding in Machine-to-Machine type communications, where achieving ultra-reliable low-latency communications (URLLC) is essential. Their primary issue arises from the exponential growth in the decoder's complexity as the packet size increases. This "curse of dimensionality" manifests itself in three different aspects: i) the number of correctable noise patterns, ii) the codeword space to be explored, and iii) the number of trainable parameters in the models. To address the first limitation, we explore solutions based on a Support Vector Machine (SVM) framework and suggest a bitwise SVM approach that significantly reduces the complexity of existing SVM-based solutions. To tackle the second limitation, we investigate syndrome-based neural decoders and introduce a novel message-oriented decoder, which improves on existing schemes both in the decoder architecture and in the choice of the parity check matrix. Regarding the neural network size, we develop a recurrent version of a transformer-based decoder, which reduces the number of parameters while maintaining efficiency, compared to previous neural-based solutions. Lastly, we extend the proposed decoder to support higher-order modulations through Bit-Interleaved and generic Coded Modulations (BICM and CM, respectively), aiding its application in more realistic communication environments
Villasenor-Pineda, Luis. "Contribution à l'apprentissage dans le dialogue homme-machine." Phd thesis, Université Joseph Fourier (Grenoble), 1999. http://tel.archives-ouvertes.fr/tel-00004861.
Повний текст джерелаYelisyeyev, Andriy, and Andriy Yelisyeyev. "Interface cerveau-machine à partir d'enregistrement électrique cortical." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00747428.
Повний текст джерелаAilam, El Hadj. "Machine synchrone à plots supraconducteurs : Etude et réalisation." Nancy 1, 2006. http://www.theses.fr/2006NAN10050.
Повний текст джерелаWe have designed and tested an 8-pole superconducting machine. The inductor is based on the principle of flux concentration using bulk superconductor. This principle allowed a high variation of the magnetic flux induction in the air-gap of the machine. Calculations have been carried out in two steps. Firstly, the magnetic scalar potential is calculated using the Monte Carlo method. Secondly, using the regularisation method the magnetic flux density is obtained by the derivation of the magnetic scalar potential. Theoretical study of a several MW machine has been developed, it allows to compare results obtained with different kind of high and low temperature superconductors. This study shows the advantages of the BiSrCaCuO high temperature superconductor wire especially cooled to 4,2 K. The realised machine has a stationary inductor and a rotating armature. This configuration is selected to simplify the cooling system. A cryostat is designed for a sufficient test period. The tests results show the feasibility of the flux concentration principle to realise an electrical machine
Cordelois, Antoine. "Le chez-soi et la machine à habiter." Compiègne, 2011. http://www.theses.fr/2011COMP1931.
Повний текст джерелаThe home is a place of resistance to the integration of digital technologies in a coordinated form. As a place of resistance, it can also help to reveal new modes of interaction with digital technologies. This work therefore aims to understand how, by understanding the link between an inhabitant and his home, it would be possible to develop recommendations for successful integration of digital technologies in the home. This objective is twofold, and can be viewed from two perspectives : industrial and academic. From the academic point of view, it is to understand what "being home" means and draw a model to guide the interaction with technical devices in the digital home. From the industrial point of view, this is how and under what conditions it is possible to deploy new kinds of services based on digital technologies in the home. This work begins with two theoretical chapters, respectively focused on the home concept (1) and digital technologies (2). After a chapter on tools and methods used (3), two chapters present the empirical work conducted as part of this thesis. They are grouped in the second part of this work. This second part is composed of one part in a chapter with a series of ethnographic observations of timing (back home and leaving home) and an interview (4) and also in a chapter devoted to the presentation of a draft design of a service platform for housing (5). The third part of the thesis consists of two chapters; the first (6) synthesizes elements of Chapter 1, of those, empirical, of Chapter 4, for definition of the home and dwelling. The final chapter (7) raises a number of recommendations on the basis elements from Chapters 2 and 5
Yelisyeyev, Andriy. "Interface cerveau-machine à partir d'enregistrement électrique cortical." Thesis, Grenoble, 2011. http://www.theses.fr/2011GRENS038/document.
Повний текст джерелаBrain Computer Interface (BCI) is a system for translation of brain neural activity into commands for external devices. This study was undertaken as a step toward the fully autonomous (self-paced) BCI functioning in natural environment which is of crucial importance for BCI clinical applications. To model the natural environment binary self-paced BCI experiments were carried out in freely moving animals. In comparison to the previous works, the long-term experimental sessions were carried out, which better comply with the real-life applications requirements. The main goal of the study was to discriminate the specific neuronal pattern related to the animal's control action against background brain activity of freely-moving animal. To achieve the necessary level of selectivity the Multi-Way Analysis was chosen since it provides a simultaneous signal processing in several domains, namely, temporal, frequency and spatial. To improve the capacity of the generic Multy-Way PLS approach for treatment of high-dimensional data, the Iterative NPLS algorithm is introduced in the current study. Having lower memory requirements it provides huge datasets treatment, allows high resolution, preserves the accuracy of the generic algorithm, and demonstrates better robustness. For adaptive calibration of BCI system the Recursive NPLS algorithm is proposed. Finally, the Penalized NPLS algorithm is developed for effective selection of feature subsets, namely, for subset of electrodes. The proposed algorithms were tested on artificial and real datasets. They demonstrated performance which either suppress or is comparable with one of the generic NPLS algorithm. Their computational efficiency is acceptable for the real-time applications. Developed algorithms were applied for calibration of the BCI system and were used in the real-time close-loop binary BCI experiments in animals. The proposed methods represent a prospective approach for further development of a human BCI system
Artusi, Xavier. "Interface cerveau machine avec adaptation automatique à l'utilisateur." Phd thesis, Ecole centrale de Nantes, 2012. http://www.theses.fr/2012ECDN0018.
Повний текст джерелаWe study a brain computer interface (BCI) to control a prosthesis with thought. The aim of the BCI is to decode the movement desired by the subject from electroencephalographic (EEG) signals. The core of the BCI is a classification algorithm characterized by the choice of signals descriptors and decision rules. The purpose of this thesis is to develop an accurate BCI system, able to improve its performance during its use and to adapt to the user evolutions without requiring multiple learning sessions. We combine two ways to achieve this. The first one is to increase the precision of the decision system by looking for relevant descriptors for the classification. The second one is to include a feedback to the user on the system decision : the idea is to estimate the error of the BCI from evoked brain poten tials, reflecting the emotional state of the patient correlated to the success or failure of the decision taken by the BCI, and to correct the decision system of the BCI accordingly. The main contributions are : we have proposed a method to optimize the feature space based on wavelets for multi-channel EEG signals ; we quantified theoretically the performances of the complete system improved by the detector ; a simulator of the corrected and looped system has been developed to observe the behavior of the overall system and to compare different strategies to update the learning set ; the complete system has been implemented and works online in real conditions
Artusi, Xavier. "Interface Cerveau Machine avec adaptation automatique à l'utilisateur." Phd thesis, Ecole centrale de nantes - ECN, 2012. http://tel.archives-ouvertes.fr/tel-00822833.
Повний текст джерелаGyrard, Amélie. "Concevoir des applications internet des objets sémantiques." Thesis, Paris, ENST, 2015. http://www.theses.fr/2015ENST0018/document.
Повний текст джерелаAccording to Cisco's predictions, there will be more than 50 billions of devices connected to the Internet by 2020.The devices and produced data are mainly exploited to build domain-specific Internet of Things (IoT) applications. From a data-centric perspective, these applications are not interoperable with each other.To assist users or even machines in building promising inter-domain IoT applications, main challenges are to exploit, reuse, interpret and combine sensor data.To overcome interoperability issues, we designed the Machine-to-Machine Measurement (M3) framework consisting in:(1) generating templates to easily build Semantic Web of Things applications, (2) semantically annotating IoT data to infer high-level knowledge by reusing as much as possible the domain knowledge expertise, and (3) a semantic-based security application to assist users in designing secure IoT applications.Regarding the reasoning part, stemming from the 'Linked Open Data', we propose an innovative idea called the 'Linked Open Rules' to easily share and reuse rules to infer high-level abstractions from sensor data.The M3 framework has been suggested to standardizations and working groups such as ETSI M2M, oneM2M, W3C SSN ontology and W3C Web of Things. Proof-of-concepts of the flexible M3 framework have been developed on the cloud (http://www.sensormeasurement.appspot.com/) and embedded on Android-based constrained devices
Ouhrouche, Mohand-Améziane. "Contributions à l'étude et à l'application industrielle de la machine asynchrone." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0024/NQ37381.pdf.
Повний текст джерелаMarty, Guy. "Contribution à la conception et à la réalisation d'une machine EDIFACT." Toulouse 3, 1995. http://www.theses.fr/1995TOU30100.
Повний текст джерелаLuo, Lingai. "Etude thermodynamique et thermique de machine à cycle inverse à adsorption." Vandoeuvre-les-Nancy, INPL, 1991. http://docnum.univ-lorraine.fr/public/INPL_T_1991_LUO_L.pdf.
Повний текст джерелаNguyen, Duy-Minh. "Commande intermittente de la machine à réluctance variable à double saillance." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS197/document.
Повний текст джерелаThe intermittent control aims to increase the efficiency of the machine-converter system by reducing the losses. In the purpose to maintain the average torque of the machine required by the load, this control increases the reference torque and turns off some phases during each electrical period or each mechanical period. By this fact, it reduces the converter losses and the ferromagnetic losses of the machine. It also has a freedom in the selection of the activated phases which influences the generated frequencies of the current, the radial force and the torque. Therefore, this strategy of the intermittent control, which is called sliding strategy, can avoid the excitation of the natural frequencies of the stator, or those of the drivetrain. It aims to reduce the negative effects of the intermittent control vis-à-vis the vibration of the stator and the pulsation of the drivetrain which are respectively at the origins of acoustic noise and mechanical jerks. Finally, the intermittent control is validated on driving cycles and can save up to 5.17 % of the consumed electrical energy
Vidal, Paul-Etienne. "Commande non-linéaire d'une machine asynchrone à double alimentation." Phd thesis, Toulouse, INPT, 2004. http://oatao.univ-toulouse.fr/7355/1/vidal.pdf.
Повний текст джерелаKarajani, Pirro. "Équilibrage modal de rotors flexibles : application à une machine." Compiègne, 1995. http://www.theses.fr/1995COMPD795.
Повний текст джерелаCipres, de Cacqueray Pascale. "La génération d'objets texturés : application à la machine VOXAR." Toulouse 3, 1990. http://www.theses.fr/1990TOU30084.
Повний текст джерелаVandecasteele, Freddy. "Alimentation optimisée d'une machine asynchrone diphasée à commande vectorielle." Lille 1, 1998. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/1998/50376-1998-295.pdf.
Повний текст джерелаOn propose pour cela dans le chapitre iii, une structure de correcteur basee sur le phenomene de resonance. Sa synthese, ses qualites en asservissement et en regulation, sa robustesse sont demontrees et en font la solution incontournable pour le suivi de trajectoire alternative. Dans le chapitre iv, le convertisseur est associe au moteur diphasee. L'equivalence entre la machine reelle et une machine symetrique est a la base du developpement d'une commande vectorielle originale. En effet, le controle des courants s'effectue dans le repere naturel des enroulements grace au correcteur resonnant. Cette strategie permet alors un controle efficace de la vitesse. Le chapitre v propose l'utilisation d'un convertisseur 3/2 a point milieu capacitif. On utilise une cellule d'interrupteurs connectee au reseau afin de maintenir a leur valeur les tensions aux bornes des condensateurs
Ye, Haiyan. "Systèmes comparateurs de sons : de l'homme à la machine." Grenoble INPG, 1989. http://www.theses.fr/1989INPG0034.
Повний текст джерелаMohsen, Ghribi. "Commande optimale de vitesse d'une machine à courant continu." Thèse, Université du Québec à Trois-Rivières, 1989. http://depot-e.uqtr.ca/5629/1/000576644.pdf.
Повний текст джерелаBruguier, Cyrille. "Commande d'une machine synchrone à aimants sans capteur mécanique." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0133.
Повний текст джерелаCESARO, GIORGIA. "Machine à émouvoir. Kazuō Shinohara e i dispositivi dell’inatteso." Doctoral thesis, Università IUAV di Venezia, 2020. http://hdl.handle.net/11578/286426.
Повний текст джерелаVoyant, Jean-Yves. "Calcul des performances d'une machine synchrone à poles saillants." Grenoble INPG, 1997. http://www.theses.fr/1997INPG0195.
Повний текст джерелаThis thesis deals with the analysis of separately-excited synchronous machines (field winding). Mathematical expressions are derived under analytic forms for study and design stages (e. G. Pre-calculation of wave shapes and iron losses). The first chapter introduces electric vehicles (E. V. ) and drive-train particularities. This part shows the constraints which can affect magnetic values inside E. V. Machines. The second chapter develops a calculation method relevant to this context. It allows the analysis of harmonic effects as a result of saliency and machine rotation. This method is based on the study of air-gap permeance (data are obtained once only from a numerical resolution) leading to either punctual or harmonic models of this zone. Complementary information is also given in order to apply the characterisation method to synchronous machines excited with permanent magnets. The next chapters are dedicated to the use and validation of the model forvarious machine operating points. Direct and quadrature-axis inductances are ca1culated for steady-state operation ; the instantaneous flux distribution during rotation is also determined. Cases of high speed with a large. Armature reaction field can be investigated as weIl as cases of maximum torque. The analytic-model results have been compared to those obtained with all-numerical computations (finite elements). The model is able to reconstruct the different cases, with excellent accuracy, even for extensive-saturation cases (core non-linearity). These comparisons confirm the validity of the proposed concept
Elmadah, Hamed. "Machine synchro-réluctante à haute température interne (500° C)." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0109.
Повний текст джерелаElectrical machines with their electronic control systems offer very interesting functional possibilities, but they can only be used permanently in a limited temperature range because of their polymer electrical isolation system. After analyzing the technological locks that limit the internal temperature of current electrical machines, the structure of a machine able to work at a very high internal temperature, around 500°C is proposed. The proposed machine is designed with an inorganic electrical isolation system made without any polymer. The coils of the experimental machine are made with a specific design; tests prove that the proposed coils are able to withstand the electrical stresses imposed by the steep fronts of the PWM inverters supplied by the HVDC 540V bus at high temperatures. To avoid the thermal limits related to the magnets, the proposed structure is the synchro-reluctant machine with concentrated windings. The magnetic circuit consists of sheets of FeCo at the stator and FeSi at the rotor. The magnetic sheets must be insulated by their natural oxidation. A theoretical study of the possible topologies and a process of design and optimization of geometry of the critical elements is performed. A prototype that implements the proposed solutions has been constructed. Experiments on this prototype at an ambient temperature of 320°C and an internal temperature of 550°C show that it is possible to operate permanently at these temperatures. A critical analysis presents the new limits of this high temperature of machine
Salloum, Georges. "Contribution à la commande robuste de la machine asynchrone à double alimentation." Phd thesis, Toulouse, INPT, 2007. http://oatao.univ-toulouse.fr/7534/1/salloum.pdf.
Повний текст джерелаDehlinger, Nicolas. "Étude des performances d'une machine à flux transverse à noyaux ferromagnétiques amorphes." Thesis, Université Laval, 2007. http://www.theses.ulaval.ca/2007/24934/24934.pdf.
Повний текст джерелаTransverse flux machines (TFM) are known for their excellent torque-to-mass and torque-to-volume ratio when compared to conventional machines. Despite this advantage, they have some serious shortcomings like complex construction and high cost, explaining why TFM that can be found in the literature are usually only prototypes. Moreover, the TFM shows a dependence of its force density upon its pole pitch and airgap thickness, which leads to high electrical frequencies and thus to high core losses. For all these reasons, this type of machine could be considered in high-torque low-speed applications such as wind turbines or electrical traction drives. The work presented in this document contributes to the development of a new TFM configuration: the claw-pole TFM with hybrid stator (CPTFMHS). Such a stator built from a combination of Fe-Si laminations and powdered iron (SMC), enables reducing iron losses significantly and improving the ease of manufacturing of the machine. The concept of the hybrid stator can be further developed by using new magnetic materials with lower specific losses. The substitution of Fe-Si laminations by amorphous cores in the stator of the CPTFMHS is studied in this work and presented here. Experimental measurements are conducted on a one-pole pair CPTFMHS machine with an amorphous core: the results show a reduction of the total iron losses, thus proving benefits of amorphous cores used in the machine. Finite element simulations coupled with experimental measurements lead to the following conclusion: the efficiency of a CPTFMHS machine can be maintained to a high level at frequencies above 400 Hz, thanks to the use of amorphous cores, which may not be possible with Fe-Si laminations.
Seleme, Seleme Isaac. "Commande à énergie minimale de la machine asynchrone : application à la robotique." Grenoble INPG, 1994. http://www.theses.fr/1994INPG0072.
Повний текст джерелаKhaldi, Kamel. "Machine synchrone autopilotée à aimants permanents commandée à angle de décalage constant." Lille 1, 1987. http://www.theses.fr/1987LIL10071.
Повний текст джерелаSylla, Abdoulaye Mamadie. "Modélisation d'un émulateur éolien à base de machine asynchrone à double alimentation." Thèse, Université du Québec à Trois-Rivières, 2013. http://depot-e.uqtr.ca/6946/1/030586161.pdf.
Повний текст джерелаPoitiers, Frédéric. "ETUDE ET COMMANDE DE GENERATRICES ASYNCHRONES POUR L'UTILISATION DE L'ENERGIE EOLIENNE - Machine asynchrone à cage autonome - Machine asynchrone à double alimentation reliée au réseau." Phd thesis, Université de Nantes, 2003. http://tel.archives-ouvertes.fr/tel-00011383.
Повний текст джерелаAprès un bref rappel des concepts et équations régissant le fonctionnement d'un système éolien, ce document dresse un état de l'art des ensembles machines – convertisseurs utilisés dans l'énergie éolienne.
Une première étude montre les performances et les limites d'utilisation de la machine asynchrone à cage auto-excitée. Elle utilise une modélisation originale et simple où le modèle de la machine est complètement indépendant de celui de la charge et des capacités d'excitation. Les régimes équilibré et déséquilibré sont étudiés en simulation et validés expérimentalement.
Dans un deuxième temps, la réalisation d'un simulateur physique d'aérogénérateur est présentée. Celui-ci est destiné à placer les génératrices à l'étude dans des conditions proches de la réalité en les entraînant grâce à une machine à courant continu commandée de façon à reproduire les variations de couple d'une éolienne.
La troisième partie de ce mémoire est consacrée à la production d'électricité sur un réseau grâce à une machine asynchrone à double alimentation. L'originalité de cette machine, utilisée dans un système éolien, est de pouvoir contrôler l'échange de puissance entre le stator et le réseau en agissant sur les signaux rotoriques via un convertisseur bidirectionnel. Dans cette optique une commande vectorielle en puissances active et réactive statoriques est mise en œuvre. Cette commande est élaborée et testée en synthétisant trois types de régulateurs linéaires : Proportionnel- Intégral, RST basé sur la théorie du placement de pôles et Linéaire Quadratique Gaussien basé sur la minimisation d'un critère quadratique. Les performances du dispositif sont analysées et comparées en termes de suivi de consigne, robustesse, et rejet de perturbations.
Poitiers, Frédéric. "Étude et commande de génératrices asynchrones pour l'utilisation de l'énergie éolienne : machine asynchrone à cage autonome : machine asynchrone à double alimentation reliée au réseau." Nantes, 2003. http://www.theses.fr/2003NANT2078.
Повний текст джерелаVelly, Nicolas. "Contributions à l’étude de machines multi-enroulements pour l’aéronautique : machine synchrone à aimants permanents pour la tolérance aux défauts : machine asynchrone pour la traction." Thesis, Vandoeuvre-les-Nancy, INPL, 2011. http://www.theses.fr/2011INPL022N/document.
Повний текст джерелаThe more electrical aircraft project aims at replacing most of current power generation sources by electrical ones. Consequently this replacement might generate a significant decrease of the fuel consumption. Through this thesis we determine two electrical solutions allowing on the one hand the increase of disponibility level of the actuators and on the other handthe aircraft taxiing by electrical means. We firstly focused on electrical actuators that require electrical redundancy. A first mean to achieve this redundancy is to use two actuators. Nevertheless this solution is not relevant under the reliability constraint because the global failure rate is increased. A double star permanent magnet synchronous motor with concentrated winding is proposed in which a special care was taken to the short circuit current limitation and the magnetic decoupling between the two star winding. We established a semi-analytic model for this kind of motors to predict the amplitude of the resultant of the radial forces acting on the rotor of the machine when operating under normal and faulty operation. We established the model of the machine in order to determine the command strategy. We experimentally validated all of the design principles mentioned above through a prototype designed in the laboratory and built by one of the SAFRAN group company. We secondly investigated on the way to apply the multi winding principles to a brand new project linked to the aircraft taxiing called “green taxiing”. The goal is to obtain a motor topology that allows operating on a wide speed range thanks to the command strategy and the change of its torque coefficient. We established the model of the machine and we compared the results given by this ingenious model to the results given by a finite element resolution using a transient magnetic application
Velly, Nicolas. "Contributions à l’étude de machines multi-enroulements pour l’aéronautique : machine synchrone à aimants permanents pour la tolérance aux défauts : machine asynchrone pour la traction." Electronic Thesis or Diss., Vandoeuvre-les-Nancy, INPL, 2011. http://www.theses.fr/2011INPL022N.
Повний текст джерелаThe more electrical aircraft project aims at replacing most of current power generation sources by electrical ones. Consequently this replacement might generate a significant decrease of the fuel consumption. Through this thesis we determine two electrical solutions allowing on the one hand the increase of disponibility level of the actuators and on the other handthe aircraft taxiing by electrical means. We firstly focused on electrical actuators that require electrical redundancy. A first mean to achieve this redundancy is to use two actuators. Nevertheless this solution is not relevant under the reliability constraint because the global failure rate is increased. A double star permanent magnet synchronous motor with concentrated winding is proposed in which a special care was taken to the short circuit current limitation and the magnetic decoupling between the two star winding. We established a semi-analytic model for this kind of motors to predict the amplitude of the resultant of the radial forces acting on the rotor of the machine when operating under normal and faulty operation. We established the model of the machine in order to determine the command strategy. We experimentally validated all of the design principles mentioned above through a prototype designed in the laboratory and built by one of the SAFRAN group company. We secondly investigated on the way to apply the multi winding principles to a brand new project linked to the aircraft taxiing called “green taxiing”. The goal is to obtain a motor topology that allows operating on a wide speed range thanks to the command strategy and the change of its torque coefficient. We established the model of the machine and we compared the results given by this ingenious model to the results given by a finite element resolution using a transient magnetic application
Fahas, Sofiane. "Commande directe du couple appliquée à une machine à reluctance commutée à trois phases." Master's thesis, Université Laval, 2021. http://hdl.handle.net/20.500.11794/69189.
Повний текст джерелаSwitched Reluctance (RS) Motors have an intrinsic simplicity and low cost that makethem well suited to many applications. Furthermore, the motors have a high robustness due to the ability to operate with the loss of one or more motor phases and are thus well suited to operate in harsh industrial environments. However, the motor has many drawbacks due to the motor’s doubly salient structure as well as highly non-linear torque output and magnetization characteristics. The double salient structure leads to the inability to excite the motor using conventional ac motor rotating field theory to the motor. Furthermore, due to the motor’s non-linear torque output characteristics, a hightorque ripple is inherent in the motor unless a torque ripple reduction strategy is employed. to overcome the non-linearity of the output torque and reduce torque ripple,several techniques have been developed. Direct torque control (DTC) is an excellent technique which has had good results for this type of motor. our work, is a contribution to the improvement of the DTC by the substitution of the hysteresis regulators by thoseusing artificial intelligence techniques (fuzzy logic, neural networks and neuro-fuzzy), with a more pronounced concentration in our study for fuzzy logic regulation technique with Takagi-Sugeno structure. Finally, we used the adaptive control to vary the fuzzy regulator parameters in real time during parametric disturbance of the SRM and especially during stator resistance variation. The control law and the adaptive law developed guarantee the delimitation of all the signals in the closed-loop system and the controller design is made according to Lyapunov's synthesis
Despons, Robert. "Conception d'une machine virtuelle pour les systèmes parallèles à diffusion." Phd thesis, Grenoble INPG, 1996. http://tel.archives-ouvertes.fr/tel-00004987.
Повний текст джерелаSabah, Quentin. "SIAAM: Isolation dynamique pour une machine abstraite à base d'acteurs." Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00933072.
Повний текст джерелаBoivin, Guillaume. "Conception de l'axe principal d'une machine à mesurer les coordonnées." Thesis, Université Laval, 2006. http://www.theses.ulaval.ca/2006/24077/24077.pdf.
Повний текст джерелаLibessart, Erwan. "Interface cerveau-machine : de nouvelles perspectives grâce à l'accélération matérielle." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2018. http://www.theses.fr/2018IMTA0105/document.
Повний текст джерелаBrain-Computer Interfaces (BCI) are systems that use brain activity to control an external device. Various techniques can be used to collect the neural signals. The measurement can be invasive ornon-invasive. Electroencephalography (EEG) is the most studied non-invasive method. Indeed, EEG offers a fine temporal resolution and ease of use but its spatial resolution limits the performances of BCI based on EEG. The spatial resolution of EEG can be improved by solving the EEG inverse problem, which allows to determine the distribution of electrical sources in the brain from EEG. Currently, the main difficulty is the time needed(several hours) to compute the matrix which is used to solve the EEG inverse problem. This document describes the proposed solution to provide a hardware acceleration of the matrix computation. A dedicated electronic architecture has been implemented and tested. First results show that the proposed architecture divides the calculation time by a factor of 60 on a programmable circuit. This acceleration opens up new perspectives for EEG BCI
Chekou, Sufyan. "Étude et expérimentation d'une machine synchrone rapide à réluctance variable." Paris 6, 1996. http://www.theses.fr/1996PA066083.
Повний текст джерелаSenges, Valérie. "Coopération homme-machine dans les systèmes à base de connaissances." Toulouse 1, 1994. http://www.theses.fr/1994TOU10019.
Повний текст джерелаIn order to improve cooperation with knowledge based systems, we propose to define cooperation models. These models contain the main characteristics of users in order to adapt the behavior of the system. This thesis proposes a methodology for the construction of human-machine cooperation models in knowledge based systems. The cooperation model describes the relationships existing between the knowledge domain of the user and the domain knowledge of the expert in order that the system exchanges with the user information that he or she is able to understand. Thus, the methodology proposed enables the construction of a cooperation model or each type of user. This types are defined according to all the users who may use the system. Each model contains several tasks distributions between user and computer. Theses distributions respect the organizational rules and guide more or less the users during the use of the system according to their expertise level. This human-machine cooperation is defined during the design of the system. It enables to improve human-machine interaction with kbs taking into account :. The organizational rules which define the decision margin of the users ;. The knowledge domain of the users ;. The abilities and the aims of the users
Abed, Aïcha. "Contribution à l'étude et au diagnostic de la machine asynchrone." Nancy 1, 2002. http://www.theses.fr/2002NAN10020.
Повний текст джерелаUsed in the majority of the electric drives, the asynchronous machine tends to supplant the machine with D. C. Current as well as the synchronous machine because of its many qualities, and mainly of its low cost and its robustness. Thus, a general reflexion is committed in modeling and diagnostic of induction machine defects. More particularly, we propose to study the rotor defects (broken bars in the rotor). In the first time, we develop two models of the asynchronous machine for the simulation of broken bars. We present in the continuation three methods to detect this fault. The principle of detection is based on the spectral analysis of the stator current in order to follow the evolution of the frequencies which are related to the fault. Lastly, a study of the defect in the presence of a classical vector control is presented, opening a new way towards a diagnostic in the case of speed variation. An experimental part is carried out to validate the exactitude of the theoretical results and to show the effectiveness of the developed methods
Boivin, Guillaume. "Conception de l'axe principal d'une machine à mesurer les coordonnées." Master's thesis, Université Laval, 2007. http://hdl.handle.net/20.500.11794/19473.
Повний текст джерелаAsnoun, Ahmed. "Modélisation de la combustion dans une machine à compression rapide." Poitiers, 1990. http://www.theses.fr/1990POIT2302.
Повний текст джерелаPairel, Éric. "Métrologie fonctionnelle par calibre virtuel sur machine à mesurer tridimensionnelle." Chambéry, 1995. http://www.theses.fr/1995CHAMS025.
Повний текст джерелаAl-Rouh, Imad. "Contribution à la commande sans capteur de la machine asynchrone." Nancy 1, 2004. http://www.theses.fr/2004NAN10032.
Повний текст джерелаThis research deals with the velocity estimation and control of induction machine without mechanical sensor, particularly when the machine operates at low or zero speed. After an overview of the state of art in the estimation of velocity of induction machine, we have chosen the method based on the injection of a high frequency signal in induction machine with saliencies. The origin of these saliencies and the resulting current components due to the high frequency signal injection are studied in different reference frames. The signal processing aspects are investigated. We explain all the essential stages to extract induction machine position and velocity. We have studied several filtering systems, sliding DFT analysing and velocity estimation using phase locked loop. Finally, the feasibility of sensorless vector control is considered. Several simulation and experimental results are presented to confirm theoretical studies