Dissertations / Theses on the topic 'Systeme hybride'
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Hodrus, Thomas Erhard. "Prozessführungsstrategien für hybride Systeme." Karlsruhe : Univ.-Verl. Karlsruhe, 2008. http://d-nb.info/988468980/34.
Full textDiaz, Frédéric. "Systeme d'imagerie hybride par codage de pupille." Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00624387.
Full textHodrus, Thomas Erhard [Verfasser]. "Prozessführungsstrategien für hybride Systeme / von Thomas Erhard Hodrus." Karlsruhe : Univ.-Verl. Karlsruhe, 2008. http://d-nb.info/988468980/34.
Full textDevillers, Laurence. "Reconnaissance de parole continue avec un systeme hybride neuronal et markovien." Paris 11, 1992. http://www.theses.fr/1992PA112426.
Full textChombart, Anne. "Commande supervisée de systèmes hybrides." Grenoble INPG, 1997. http://www.theses.fr/1997INPG0170.
Full textBecker, Basil, and Holger Giese. "Cyber-physical systems with dynamic structure : towards modeling and verification of inductive invariants." Universität Potsdam, 2012. http://opus.kobv.de/ubp/volltexte/2012/6243/.
Full textCyber-physical Systeme erzielen ihr ausgefeiltes Systemverhalten durch die enge Verschränkung von physikalischer Kopplung, wie sie in Systemen der klassichen Igenieurs-Disziplinen vorkommt, und der Kopplung durch Informationstechnologie. Eine besondere Herausforderung stellen in diesem Zusammenhang Systeme dar, die durch die spontane Vernetzung einzelner Cyber-Physical-Systeme entsprechend der lokalen, topologischen Gegebenheiten, verfügbarer Netzwerkfähigkeiten und der Anforderungen und Beschränkungen der Teilsysteme, die durch den informationsverabeitenden Teil vorgegeben sind, entstehen. In diesem Bericht stellen wir einen Formalismus vor, der die Modellierung der eingangs skizzierten Systeme erlaubt. Ein auf UML aufbauender Graph-Transformations-Ansatz wird genutzt, um die spontane Bildung eng kooperierender Teilsysteme beliebiger Größe zu spezifizieren. Differentialgleichungen beschreiben das kombinierte Verhalten auf physikalischer Ebene. In Kombination ergeben diese beiden Formalismen hybride Graph-Transformations-Systeme, in denen die Graph-Transformationen diskrete Schritte und die Differentialgleichungen das kontinuierliche, physikalische Verhalten des Systems beschreiben. Zusätzlich, präsentieren wir die Erweiterung einer automatischen Analysetechnik zur Verifikation induktiver Invarianten, die bereits für zeitbehaftete Systeme bekannt ist, auf den ausdrucksstärkeren Fall der hybriden Modelle.
Kossel, Roland [Verfasser], and Jürgen [Akademischer Betreuer] Köhler. "Hybride Simulation thermischer Systeme am Beispiel eines Reisebusses / Roland Kossel ; Betreuer: Jürgen Köhler." Braunschweig : Technische Universität Braunschweig, 2011. http://d-nb.info/1175824658/34.
Full textTovar, Günter. "Biomimetische Grenzflächen mittels hierarchisch strukturierter Systeme zur molekularen Erkennung." [S.l. : s.n.], 2004. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB12046149.
Full textTrousseau, Céline. "Adaptation de la stratégie de fonctionnement des systèmes hybrides au dimensionnement évolutif en situation de production décentralisée d'électricité." Paris, ENMP, 2004. http://www.theses.fr/2004ENMP1234.
Full textThe issue of design of stand-alone systems for the generation of electricity with renewable energies is composed of two parts, the sizing of the different components, and the choice of the energy management in hybrid systems, which include a controllable energy source. If the two questions have been thus treated separately for many systems of varied sizes, on the other hand the choice of the strategy of management of the most efficient energy management according to the sizing remains an unaddressed topic. This is exactly the topic of this thesis. Applied to the interconnected decentralised production, the goal is to know if the system control strategy should be reconsidered following a power change of the components. Detailed modelling also made it possible to contribute to the discussion regarding the choice between connection by dc current or ac current, by comparisons of performances of the systems
Vera, Estrada Martin Carlos. "Modélisation et commande des systèmes dynamiques hybrides." Grenoble INPG, 2000. http://www.theses.fr/2000INPG0055.
Full textDelemar, Olivier. "Reconnaissance de la parole par une méthode hybride : texte imprimé : Réseaux markoviens et base de règles." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0052.
Full textJacot, Laurent. "Contribution à l'étude des systèmes à évènements discrets et des systèmes hybrides : théorie et mise en oeuvre des machines de Pétri." Grenoble INPG, 1994. http://www.theses.fr/1994INPG0134.
Full textIqbal, Naeem. "Invariance sous contraintes et commande sous-optimale de grands procedes implicites par l'approche systeme dynamique hybride." Rennes 1, 1997. http://www.theses.fr/1997REN10176.
Full textCorrea, e. Silva Fernandes Kelly Christine. "Systèmes multi-agents hybrides : une approche pour la conception de systèmes complexes." Université Joseph Fourier (Grenoble ; 1971-2015), 2001. http://www.theses.fr/2001GRE10121.
Full textBornot, Sébastien. "De la composition des systèmes temporisés." Grenoble 1, 1998. http://www.theses.fr/1998GRE10243.
Full textHawryszkiw, Jean. "Traitement d'images hybride pour l'analyse qualitique et metrologique de structures." Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR13320.
Full textCrozatier, Michèle. "Structure et organisation des elements i impliques dans le systeme i-r de dysgenesie hybride chez drosophila melanogaster." Clermont-Ferrand 2, 1987. http://www.theses.fr/1987CLF21043.
Full textLavige, Jean-Marc. "Systeme i-r de dysgenesie hybride chez drosophila melanogaster : etude du developpement abortif des embryons de meres sf." Clermont-Ferrand 2, 1987. http://www.theses.fr/1987CLF21080.
Full textKarami, Nabil. "Control of a hybrid system based PEMFC and photovoltaic panels." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4356/document.
Full textOur societies are increasingly concerned about the very harmful impact of clean energy resources, mainly oil, coal and gas. Thus, interest in the use of renewable and clean energy is constantly increasing and the development of new energy systems has become a scientific and technological challenge. To develop new competitive and efficient energy solutions, manufacturers of components (solar panels, fuel cells, inverters, etc.) and industrial sectors are facing problems of optimization, control and durability. In addition, renewable energy sources depend on several uncontrollable factors (geographical location, weather, etc.). To address these factors, and thus the randomness of energy availability, sources hybridization and energy management can prove to be an appropriate approach for the design of efficient energy solutions. This thesis is a contribution to the problem of hybridization and energy management. More precisely, we consider a hybrid system composed of photovoltaic solar panels and a fuel cell. This system is supposed to be equipped with converters and storage system (battery and supercapacitors). The goal is to develop control strategies to extract the maximum power available from the considered sources and to optimize the overall energy system to meet the load requirements. To do this, our approach is based on the tracking of the maximum power point and the use of compensators
Thévenon, Luc. "Représentation des systèmes hybrides complexes par flux de données : développement d'un outil de modélisation et de simulation des procédés Batch." Grenoble INPG, 2000. http://www.theses.fr/2000INPG0108.
Full textFournier, Catherine. "Etude fonctionnelle du domaine sh3 des spectrines erythroides et non erythroides ; recherche de ligands par le systeme du double-hybride." Paris 7, 1998. http://www.theses.fr/1998PA077057.
Full textMarkert, Erik. "High-Level-Entwurf von Mikrosystemen." Doctoral thesis, Universitätsverlag der Technischen Universität Chemnitz, 2009. https://monarch.qucosa.de/id/qucosa%3A18216.
Full textThe PhD thesis proposes a toolflow for the design of microsystems on higher abstraction levels. Microsystems may consist of components using effects in different physical domains plus additional digital hardware and software. The collection and formalization of these heterogeneous systems is a first step in the design process, the associated design method ist the key point of this work. The system behavior is modeled using hybrid automata, which are checkable using hybrid modelcheckers and simulable using SystemC-AMS. Furthermore the work deals with signal forms and circuit parameters. To support modeling on lower abstraction levels like differential algebraic equations a syntax conversion from SystemC-AMS to VHDL-AMS was included. The integration of cost factors into SystemC-AMS allows design space exploration during system simulation.
Vaury, Chantal. "Le systeme i-r de dysgenesie hybride chez drosophila melanogaster : etude des elements i detectifs heterochromatiques et de leur region d'insertion." Clermont-Ferrand 2, 1989. http://www.theses.fr/1989CLF2E417.
Full textLAMOTHE, BETTY. "Le recepteur de l'insuline : etudes employant l'invalidation de gene chez la souris et le systeme du double-hybride chez la levure." Paris 6, 1999. http://www.theses.fr/1999PA066276.
Full textYu, Lei. "Reconstruction du signal ou de l'état basé sur un espace de mesure de dimension réduite." Thesis, Cergy-Pontoise, 2011. http://www.theses.fr/2011CERG0546/document.
Full textThis is the era of information-explosion, billions of data are produced, collected and then stored in our daily life. The manners of collecting the data sets are various but always following the criteria { the less data while the more information. Thus the most favorite way is to directly measure the information, which, commonly, resides in a lower dimensional space than its carrier, namely, the data (signals or states). This method is thus called information measuring, and conceptually can be concluded in a framework with the following three steps: (1) modeling, to condense the information relevant to signals to a small subspace; (2) measuring, to preserve the information in lower dimensional measurement space; and (3) restoring, to reconstruct signals from the lower dimensional measurements. From this vein, the main contributions of this thesis, saying observer and model based Bayesian compressive sensing can be well uni_ed in the framework of information measuring: the main concerned problems of both applications can be decomposed into the above three aspects. In the _rst part, the problem is resided in the domain of control systems where the objective of observer design is located in the observability to determine whether the system states are recoverable and observation of the system states from the lower dimensional measurements (commonly but not restrictively). Speci_cally, we considered a class of switched systems with high switching frequency, or even with Zeno phenomenon, where the transitions of the discrete state are too high to be captured. However, the averaged value obtained through filtering the transitions can be easily sensed as the partial knowledge. Consequently, only with this partial knowledge, we discussed the observability respectively from differential geometric approach and algebraic approach and the corresponding observers are designed as well. At the second part, we switched to the topic of compressive sensing which is objected to sampling the sparse signals directly in a compressed manner, where the central fundamentals are resided in signal modeling according to available priors, constructing sensing matrix satisfying the so-called restricted isometry property and restoring the original sparse signals using sparse regularized linear inversion algorithms. Respectively, considering the properties of CS related to modeling, measuring and restoring, we propose to (1) exploit the chaotic sequences to construct the sensing matrix (or measuring operator) which is called chaotic sensing matrix, (2) further consider the sparsity model and then rebuild the signal model to consider structures underlying the sparsity patterns, and (3) propose three non-parametric algorithms through the hierarchical Bayesian method. And the experimental results prove that the chaotic sensing matrix is with the similar property to sub-Gaussian random matrix and the additional consideration on structures underlying sparsity patterns largely improves the performances of reconstruction and robustness
Markert, Erik. "High-Level-Entwurf von Mikrosystemen." Doctoral thesis, Chemnitz Univ.-Verl, 2010. http://d-nb.info/1001982053/04.
Full textCHABOISSIER, MARIE-CHRISTINE. "Etude de la transcription et de la regultion du facteur i implique dans le systeme ir de dysgenesie hybride chez drosophila melanogaster." Paris 11, 1993. http://www.theses.fr/1993PA112146.
Full textSchultz, Thorsten. "Energy level alignment mechanisms at inorganic-organic semiconductor interfaces investigated with photoelectron spectroscopy." Doctoral thesis, Humboldt-Universität zu Berlin, 2019. http://dx.doi.org/10.18452/19653.
Full textHybrid inorganic/organic systems (HIOS) have attracted a lot of interest for fundamental studies and novel (opto)-electronic devices during the past decade. For developing efficient devices, an understanding and control of the energy level alignment (ELA) at the hybrid interface is of paramount importance. Firstly, it is demonstrated how surfaces with non-uniform local work function influence the measurement results obtained by ultraviolet photoelectron spectroscopy (UPS). By comparing the measured results with calculations, it is found that the electrostatic potential above the surface leads to an additional energy barrier for electrons above low work function areas, shifting the secondary electron cut-off (SECO) to higher kinetic energies in UPS (averaging effect). The influence of pattern size and measurement conditions on the SECO is shown theoretically and experimentally. In the second part it is shown how thin organic donor/acceptor interlayers can be employed to manipulate the ELA between prototypical inorganic and organic semiconductors. The work function of the inorganic substrate can be tuned between 2.2-6.0 eV. The influence of gap states within the inorganic band gap on the band bending change is investigated in detail and a model is proposed, which describes the pinning of the inorganic energy levels as a function of surface state density. It is further shown experimentally that the bulk doping concentration of the inorganic semiconductor has only little effect on the energetic alignment. Finally, the ELA of the transition metal dichalcogenide monolayer WSe2 with the organic acceptor molecule C60F48 is investigated. Using STM and STS measurements, it is revealed that the C60F48 forms domains on WSe2 in the sub-monolayer regime. By evaluating the potential change as a function of distance from a C60F48 edge in STS, it is possible to derive a value for the Thomas-Fermi screening length of WSe2 of about 2 nm.
Daus, Andreas Wolfgang [Verfasser], Paul G. [Akademischer Betreuer] Layer, Bodo [Akademischer Betreuer] Laube, and Christiane [Akademischer Betreuer] Thielemann. "Zellbasierte Biosensoren -- Hybride Systeme aus dreidimensionalen in vitro Netzwerken und Mikroelektroden Arrays / Andreas Wolfgang Daus. Betreuer: Paul G. Layer ; Bodo Laube ; Christiane Thielemann." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2013. http://d-nb.info/1106454634/34.
Full textPOIREY, REMY. "Utilisation de la genetique reverse et du systeme double-hybride pour l'analyse fonctionnelle de nouveaux cadres de lecture chez la levure saccharomyces cerevisiae." Université Louis Pasteur (Strasbourg) (1971-2008), 2000. http://www.theses.fr/2000STR13126.
Full textAshglaf, Mohmed Omran. "Development of Hybridization concept for horizontal axis wind / tidal systems using functional similarities and advanced real-time emulation methods." Thesis, Normandie, 2019. http://www.theses.fr/2019NORMLH07/document.
Full textThe ability of conventional wind and tidal generation systems to provide the grid with reliable and stable power at all times is a new challenge due to weather fluctuations, which have a significant and direct impact on energy production. This is why the hybridization of wind and tidal power generation systems has been studied to improve the integration of wind and tidal power into the electricity grid.This study led us to develop contributions related to two main axes:The first axis is focused on a new concept of hybridization of two different energy sources in terms of physical properties, wind and horizontal axis turbines, based on an electromechanical coupling of these two systems. The two resources are wind energy and marine energy. The concept is developed using the functional similarities of turbines and similarities in energy conversion of their energy chains. To apply this concept first, the parameters of the double fed asynchronous generator installed in the GREAH emulator are identified. Then, the power conversion chain is modeled mathematically and simulated in a MATLAB / SIMULINK environment. We have developed two control strategies.A fixed speed strategy called "Direct Speed Control", and a variable speed strategy based on the search for maximum power, called "Indirect Speed Control". Finally, this concept has been implemented practically on the real-time emulator of the laboratory. The results obtained were analyzed and discussed following this work.The second axis is devoted to a concept called "accelerated time" simulation or "virtual time". Subsequently, this concept was implemented on the multi-physics emulator available at the GREAH laboratory. This concept (accelerated time) is based on reducing wind profile samples in order to decrease simulation time and facilitate real-time control.The main results are obtained first in MATLAB / SIMULINK, then verified on the emulator in real time.The main objective of this thesis is to study the concept of offshore wind / tidal turbine hybridization based on the flexibility of a multi-function emulator that allows various emulation architectures: wind turbines, tidal turbines, and hybrid wind - tidal turbines systems. We analyze its impact on the output power of the system; the obtained results are correlated with wind and tidal speed profiles, in which statistical properties impacting global power chains could be complementary and in particular in function of the given sites. Main contributions and perspectives- Development of the concept of electromechanical coupling.When two renewable energy sources are "integrated", the rapid fluctuation of the power generated is stabilized, but under certain conditions such as the presence of storage units or an automatic clutch system.- The accelerated time conceptThis method is used to reduce the size of the recorded wind or sea current data, to speed up the simulation time of the power generation units with reasonable results that are close to actual situations.- Study and develop the concept of electric shaft regime: If the electromechanical coupling is difficult to achieve from the mechanical point of view and the single shaft decouples are too frequent so high mechanical stress, one can study the electric shaft regime with two DFIG induction machines.There is a regime in which the ratios between the speeds of the different machines are rigorously constant. The system can operate in synchronous mode with specific structures and configurations
Bornot, Sébastien. "De la composition de systèmes temporisés." Phd thesis, Université Joseph Fourier (Grenoble), 1998. http://tel.archives-ouvertes.fr/tel-00004871.
Full textZerelli, Manel. "Systèmes mécatroniques à paramètres variables : analyse du comportement et approche du tolérancement." Thesis, Châtenay-Malabry, Ecole centrale de Paris, 2014. http://www.theses.fr/2014ECAP0032/document.
Full textIn this thesis we proposed a method for the study of parametric variation for continuous and hybrid systems and an approach for mechatronics tolerancing. We first studied the different existing approaches to take into account the variation of parameters. For continuous systems with variable parameters we chose the method of differential inclusions. We took the Raczynski algorithm and we have developed an optimization algorithm which is based on the steepest descent method with an extension to obtain global optimum. For hybrid systems, containing continuous evolutions and discrete jumps, and have parametric variations, we have chosen the formalism of impulse differential inclusion as a modeling tool. We took this formalism and identified its components on a mechatronic system. We have developed algorithms for solving impulse differential inclusions for several variable parameters. To view the results, the developed algorithms were implemented in Mathematica. We ended this part by a comparison between our approach and others like those around hybrid automata invariant polyhedron, polygonal differential inclusions and practical algorithm for solving differential inclusion. We showed then some advantages of our approach. In the last part, we organized the different tools used and results obtained to define and refine our approach to tolerancing. We defined the area of the desired operation, the various scenarios that may present, and its intersection with reachable area. We presented a metric tool based on topological Hausdorff distance for the calculation of distances between the different sets. With these elements, we proposed an iterative approach to tolerancing in the state space
Mutz, Niklas. "Energy and Charge Transfer at Hybrid Interfaces Probed by Optical Spectroscopy." Doctoral thesis, Humboldt-Universität zu Berlin, 2021. http://dx.doi.org/10.18452/22797.
Full textHybrid inorganic/organic systems can combine the advantages of both materials such as high carrier mobilities in inorganic semiconductors and large light-matter interaction in organic ones. In order to benefit from these heterostructures, a thorough understanding of the interface is needed. Two processes occurring at the interface are looked at in this thesis. Förster resonance energy transfer (FRET) is studied between a single InGaN/GaN quantum well and the polymer Cn-ether PPV. Despite the large internal electric fields in the quantum well, efficient FRET is possible as long as other non-radiative decay channels are suppressed. This is shown by temperature dependent PL and PLE spectroscopy. PLE spectra clearly demonstrate an enhanced light emission from the acceptor. At elevated temperatures, non-radiative decay pathways become dominant. Excited-state charge transfer is studied on MoS2 in combination with the molecule H2Pc. The combination with molecules can extend the functionality of MoS2. Photoelectron spectroscopy (PES) reveals a type II energy level alignment at the MoS2/H2Pc interface. Excited electrons are transferred from H2Pc to MoS2, deduced from a shortening of the H2Pc PL decay time. Photocurrent spectra further show that the transferred electrons contribute to an enhanced photoconductivity. Additionally, bare 2D transition-metal dichalcogenides (TMDCs) are studied. In order to fabricate high-quality TMDC monolayers, a growth method was developed in-house. The grown monolayers are characterised by optical spectroscopy. The versatility of the method is demonstrated by the growth of alloys and heterostructures. The influence of the substrate dielectric function is investigated by comparing band-gaps measured by PES with the exciton transition energies obtained by reflectance measurements. An almost equal reduction in both energies with the substrate dielectric constant is seen.
Saenger, Pierre. "Optimisation et gestion d'énergie d'un système hybride électrique embarqué." Thesis, Bourgogne Franche-Comté, 2017. http://www.theses.fr/2017UBFCD061/document.
Full textThe "more electric" aircrafts reduce the embedded weight, greenhouse gas emissions and fuel consumption. Their development requires to adapt their electrical architecture and their energy production and storage capacity.Production and storage systems must be well dimensioned to match thevehicle energy requirements. An electric hybridization integrating alithium-ion battery pack and a supercapacitor pack can respectively respond to the energy and power demands of the load.Different electrical hybridization architectures will be studied. This research project deals with the optimal designs of these storage systems on board a helicopter.In this particular application, the overall mass of the entire storagetank system must be minimized. An optimal sizing tool is developed toachieve this objective by acting on the cut-off frequency of alow-pass filter. This frequency approach, based on the most demanding mission profile in terms of energy and power, allows the allocation of power demand between our two storage systems and, therefore, their characterization.Optimization results obtained by electrical architecture using thesimulated annealing method are presented and evaluated over the entiretemperature range. An adaptation of the energy managementstrategy is also presented to evaluate the influence of temperature on battery performance
Etienne, Lucien. "Eléments d'observation et d'estimation pour les systèmes contrôlés en réseaux." Thesis, Cergy-Pontoise, 2016. http://www.theses.fr/2016CERG0853/document.
Full textNetwork control systems is an active field of study where interacting component spatially distributed try to achieve a global goal. They naturally emerge from the interaction of computer driven mechanism and the physical world.Along with network control system a related class of systems is described by the so called: Cyber-physical systems, where integrated physical computational capabilities can interact.In this work we will consider the classical task of observation and estimation and investigate cases where network induced constraint calls for adapted observation and estimation scheme.In control system due to limitation in sensors ( for practical reason such as cost reduction) all the value of interest (whether the some unmeasured state or unknown parameter)are unknown. The classical notion of observabilityaccount for the ability to deduce from measurement those value of interest.First sampling reduction by use of event trigger will be studied for several class of systems. Then an estimation and control scheme will be establish to solve the problem of consensus in a multi agents system.Finally considering a more complex vehicle dynamic we focus on the estimation of tire road friction coefficient to solve a tracking problem
Bompas, Cécile-Aline. "Contribution à la validation expérimentale du couplage entre un accélérateur et un massif sous-critique : expériences MUSE III et MUSE IV." Université Joseph Fourier (Grenoble), 2000. http://www.theses.fr/2000GRE10225.
Full textIbrahim, Faisal. "Vers un outil de simulation de la commande d'un processus dynamique hybride." Vandoeuvre-les-Nancy, INPL, 1993. http://www.theses.fr/1993INPL121N.
Full textDjaballah, Adel. "Calcul par analyse intervalle de certificats de barrière pour les systèmes dynamiques hybrides." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS195/document.
Full textThis thesis addresses the problem of proving the safety of systems described by non-linear dynamical models and hybrid dynamical models. A system is said to be safe if all trajectories of its state do not reach an unsafe region. Proving the safety of systems by explicitly computing all its trajectories when its dynamic is non-linear or when its behavior is described by an hybrid model with non-linear dynamics remains a challenging task. This thesis considers the barrier function approach to prove the safety of a system. A barrier function, when it exists, partitions the state space and isolates the trajectories of the system starting from any possible initial values of the state and the unsafe part of the state space. The set of constraints, which have to be satisfied by a barrier function are usually non-convex, rendering the search of satisfying barrier functions hard. Previously, only polynomial barrier functions were taken in consideration and for systems with polynomial dynamics. This thesis considers relatively general dynamical systems with generic non-linear barrier functions. The solutions presented are based on template barrier functions, constraint satisfaction problems, and interval analysis. The first part of the thesis focuses on non-linear dynamical systems. The barrier function design problem is formulated as a constraint satisfaction problem that can be solved using tools from interval analysis. This formulation allows one to prove the safety of a non-linear dynamical system by finding the parameters of a template barrier function such that all constraints are satisfied using the FPS-CSC algorithm, which has been adapted and supplemented with contractors to improve its efficiency. The second part of the thesis is dedicated to the design of barrier functions for systems described by hybrid dynamical models. Safety properties have to be proven during the continuous-time evolution of the system, but also during transitions. This leads to additional constraints that have to be satisfied by candidate barrier functions. Solving all the constraints simultaneously to find all the barrier functions is usually computationally intractable. In the proposed approach, the algorithm explores all the locations sequentially. Transition constraints are introduced progressively between the already explored locations. Backtracking to previous location is considered when transition constraints are not satisfied. The efficiency of the proposed approaches has been compared with state-of-the-art solutions
Glotin, Hervé. "Elaboration et comparaison de systèmes adaptatifs multi-flux de reconnaissance robuste de la parole : incorporation des indices de voisement et de localisation." Grenoble INPG, 2001. http://www.theses.fr/2001INPG0043.
Full textMOY, CHRISTOPHE. "Conception d'un systeme de transmission numerique a etalement de spectre hybride ds/fh de type rake adapte au canal de diffusion tropospherique - mesures de propagation sur une liaison experimentale a 4,5 ghz." Rennes, INSA, 1999. http://www.theses.fr/1999ISAR0006.
Full textLayet, Corine. "Approche des bases structurales de l'antigenicite des antigenes hla de classe i." Aix-Marseille 2, 1986. http://www.theses.fr/1986AIX22046.
Full textSanchez, Perez Célia. "Dispositifs optiques intègrés hybrides, verre / polymère électro-optique : applicationà un polariseur et à un modulateur de phase." Grenoble INPG, 2000. http://www.theses.fr/2000INPG0159.
Full textRay, Rajarshi. "Calcul d'Atteignabilité des systèmes hybrides avec des fonctions de support." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00768033.
Full textBatis, Sonia. "Commande d'une classe de systèmes hybrides par automates hybrides rectangulaires." Thesis, Grenoble, 2013. http://www.theses.fr/2013GRENT025/document.
Full textIn this thesis, we study the control of a class of hybrid dynamic systems (HDS). The chosen modeling tool is the rectangular hybrid automaton (RHA) for his analysis power. We propose a method for the control synthesis of HDS modeled with RHA. This method consists on the application of a downstream/upstream offline control procedure that determines in a maximal permissive way the new automaton transition guards respecting the desired control specifications. All computations are based on the determination of the duration of stay, a value constrained by the reachable space of the corresponding location. Since the guard refers to both continuous state and discrete event, the control is made by the latter because it is the controllable element. Then we are interested in the construction of the timed controller authorizing the system controllable event occurrence in a clock interval defined in a maximal permissive way
Werner, Quentin. "Model-based optimization of electrical system in the early development stage of hybrid drivetrains." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0109.
Full textThis work analyses the challenges faced by the electric components for traction purpose in hybrid drivetrains. It investigates the components and their interactions as an independent entity in order to refine the scope of investigation and to find the best combinations of components instead of the best components combinations. Hybrid vehicle is currently a topic of high interest because it stands for a suitable short-term solution towards zero emission vehicle. Despite its advantages, it is a challenging topic because the components need to be integrated in a conventional drivetrain architecture. Therefore, the focus of this work is set on the determination of the right methods to investigate only the electric components for traction purpose. The aim and the contributions of this work lies thereby in the resolution of the following statement: Determine the sufficient level of details in modeling electric components at the system level and develop models and tools to perform dynamic simulations of these components and their interactions in a global system analysis to identify ideal designs of various drivetrain electric components during the design process. To address these challenges, this work is divided in four main parts within six chapters. First the current status of the hybrid vehicle, the electric components and the associated optimization methods and simulation are presented (first chapter). Then for each component, the right modeling approach is defined in order to investigate the electrical, mechanical and thermal behavior of the components as well as methods to evaluate their integration in the drivetrain (second to fourth chapter). After this, a suitable method is defined to evaluate the global system and to investigate the interactions between the components based on the review of relevant previous works (chapter five). Finally, the last chapter presents the optimization approach considered in this work and the results by analyzing different system and cases (chapter six). Thanks to the analysis of the current status, previous works and the development of the simulations tools, this work investigates the relationships between the voltage, the current and the power in different cases. The results enable, under the considered assumptions of the work, to determine the influence of these parameters on the components and of the industrial environment on the optimization results. Considering the current legislative frame, all the results converge toward the same observation referred to the reference systems: a reduction of the voltage and an increase of the current leads to an improvement of the integration and the performance of the system. These observations are linked with the considered architecture, driving cycle and development environment but the developed methods and approaches have set the basis to extend the knowledge for the optimization of the electric system for traction purpose. Beside the main optimization, special cases are investigated to show the influence of additional parameters (increase of the power, 48V-system, machine technology, boost-converter…) In order to conclude, this work have set the basis for further investigations about the electric components for traction purpose in more electrified vehicle. Due to the constantly changing environment, the new technologies and the various legislative frame, this topic remains of high interest and the following challenges still need to be deeper investigated: * Application of the methods for other drivetrain architecture (series hybrid, power-split hybrid, fuel-cell vehicle, full electric vehicle), * Investigation of new technologies such as silicon-carbide for the power electronics, lithium–sulfur battery or switch reluctance machine, * Investigation of other driving cycle, legislative frame, * Integration of additional power electronics structure, * Further validation of the modeling approaches with additional components
Sandoval, torres Cinda Luz. "Contrôle d’une source d’énergie hybride : Pile à combustible-Supercondensateur." Thesis, Paris, ENSAM, 2016. http://www.theses.fr/2016ENAM0067/document.
Full textEnergy generation from fossil fuels combustion is predicted to have severe future impacts in the world’s economy and ecology. Fuel cells and supercapacitors are an alternative power source, environmentally friendly.This dissertation presents a regulation architecture developed to coordinate a hybrid renewable source for typical solicitations of electric vehicles in a scaled operating range of 1 kW. The hybrid system is composed of a Polymer Electrolyte Membrane (PEM) fuel cell module, a supercapacitors bank and their respective power conditioning units. In order to optimize the overall operation, the proposed strategy is organized into three hierarchical levels, and the power demand for each energy source is determined in real time with a basis on a frequency distribution and a cutoff frequency, defined in accordance with the dynamical capabilities of the sources.Even if numerous researches have been reported on the subject, few studies have taken into account the proper dynamics of each source in order to optimize the global performance of the hybrid power supply.The goal of this work is to implement a complete simulator integrating not only dynamical models of each energy source, but also dynamical models of the power conditioning units. The control strategy consists of nested loops, arranged in three functional levels of hierarchy. The central idea is to find the optimal set point for each energy source, according to their own physical properties. Contrary to the existing control strategies, this strategy dynamically calculates the appropriate power demand for each energy source. Due to the complexity of the system, cascade control loops are proposed, organized into blocks, according to the system functionality and dynamics.A functional simulation is obtained, where the system ensures the adequate supercapacitor state of charge and soft current demands to keep the fuel cell working in its safe operating region. Thus, lower fuel consumption and rapid response to load demands are guaranteed to improve efficiency.Results demonstrate that the control strategy allows the regulation of the DC bus voltage under UDDS and ECE-15 driving cycles as load profiles. The fuel cell works within its maximum efficiency region, without falling in the degradation zone. In addition, the supercapacitor state of charge remains within the recommended range
Busseau, Isabelle. "Transposition des elements i chez drosophila melanogaster : etude moleculaire de mutations induites par la dysgenesie hybride et analyse des fonctions d'un element i modifie in vitro." Clermont-Ferrand 2, 1988. http://www.theses.fr/1988CLF21136.
Full textKravtzoff, Ivan. "Optimisation d'un système hybride de génération d'énergie électrique permettant de minimiser la consommation et l'empreinte environnementale." Thesis, CentraleSupélec, 2015. http://www.theses.fr/2015SUPL0015/document.
Full textGrowing environmental issues and concerns have led to efforts to reduce CO2 and greenhouse effect pollutant emissions in the field of electric power generation. This has led Leroy Somer to investigate systems based on hybrid technologies to reduce genset fuel consumption and operating costs. A methodology is developed in this thesis to address issues of sizing hardware resources and their optimal use. The optimum energy management strategy is based on the dynamic programming algorithm of Bellman. It will be associated to a differential evolution optimization algorithm to optimize the design of the hybrid structure. The objective functions are obtained by developing energetic and economic models. Through this method, we show that the benefits of a hybrid generator are strongly related to its use. In cases where the generator is used on profiles with low load factors, the benefits will be significant. It will be very important to have good knowledge of load profiles applications before sizing the whole structure of the hybrid generator. A prototype of this system has been developed and has confirmed simulation results
Dreossi, Tommaso. "Calcul d'atteignabilité et synthèse de paramètres pour systèmes dynamiques polynomiaux." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAM096.
Full textDynamical systems are important mathematical models used to describe the temporal evolution of systems.Often dynamical systems are equipped with parameters that allow the models to better capture the characteristicsof the abstracted phenomena. An important question around dynamical systems isto formally determine whether a model (biased by its parameters) behaves well.In this thesis we deal with two main questions concerning discrete-time polynomial dynamical systems:1) the reachability computation problem, i.e, given a set of initial conditions and a set ofparameters, compute the set of states reachable by the system in a bounded time horizon;2) the parameter synthesis problem, i.e., given a set of initial conditions,a set of parameters, and a specification, find the largestset of parameters such that all the behaviors of the system staring from the set ofinitial conditions satisfy the specification.The reachability computation problem for nonlinear dynamical systems is well known for being nontrivial.Difficulties arise in handling and representing sets generated by nonlinear transformations.In this thesis we adopt a common technique that consistsin over-approximating the complex reachable sets with sets that are easy to manipulate.The challenge is to determine accurate over-approximations.We propose methods to finely over-approximate the images of sets using boxes,parallelotopes, and a new data structure called parallelotope bundles (that are collections of parallelotopeswhose intersections symbolically represent polytopes). These approximation techniquesare the basic steps of our reachability algorithm.The synthesis of parameters aims at determining the valuesof the parameters such that the system behaves as expected. This feature can beused, for instance, to tune a model so that it imitates the modeledphenomenon with a sufficient level of precision. The contributions of thisthesis concerning the parameter synthesis problem are twofold. Firstly,we define a new semantics for the Signal Temporal Logic (STL) that allows oneto formalize a specification and reason on sets of parameters and flows of behaviors.Secondly, we define an algorithm to compute the synthesis semanticsof a formula against a discrete-time dynamical system. The result of the algorithmconstitutes a conservative solution of the parameter synthesis problem.The developed methods for both reachability computation and parameter synthesisexploit and improve Bernstein coefficients computation.The techniques defined in this thesis have been implemented ina tool called Sapo. The effectiveness of our methods is validatedby the application of our tool to several polynomial dynamical systems