Дисертації з теми "Robots mobiles – Traitement réparti"
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Martin-Guillerez, Damien. "Mécanismes de prise de points de reprise opportunistes pour robots mobiles autonomes." Rennes 1, 2009. ftp://ftp.irisa.fr/techreports/theses/2009/martin-guillerez.pdf.
Повний текст джерелаFailures of mobile computing devices can lead to severe data loss. Collaborative robotic systems, designed to work in total autonomy, are sensitive to these failures. Usual methods relying on remote backup can no longer be used in a context of high mobility. Short-range communication media can be used to overcome data failure through opportunistic communications for data backup. When two devices enter their respective communication range, they can initiate an ephemeral data exchange. To overcome the lack of global network coverage in those system, we propose a backup system based on opportunistic communications to reduce the costs induced by failures inside a swarm of autonomous mobile robots
Ayari, Iskander. "Fusion multi-capteurs dans un cadre multi-agents : application à un robot mobile." Nancy 1, 1996. http://www.theses.fr/1996NAN10001.
Повний текст джерелаArnoux, Mireille. "Programmation orientée objet et systèmes multi-agents : applications en robotique et en productique." Nice, 1990. http://www.theses.fr/1990NICE4357.
Повний текст джерелаTian, Daji. "Optimisation de la Cartographie et de la navigation des Robots Mobiles Coopératifs." Thesis, Ecole centrale de Lille, 2014. http://www.theses.fr/2014ECLI0016/document.
Повний текст джерелаIn this Ph. D., we will present firstly a single robot exploration method, then a decentralized cooperative exploration strategy for a team of mobile robots equipped with a range finders. A two dimensional map of the explored area is built in the form of a pixel figure. This is expanded by the robots by using a randomized local planner that authomatically realizes a decision between information gain and navigation cost. In our work, the map is reconstructed using a least-mean square method to reduce the errors of the sensor data. In dividing the overall task into subtasks, the intelligent controller allows reducing the robots task complexity. But the fusion of different behaviors with different objectives may cause contradiction in the procedure and alter the stability of the system. Therefore, the issue of behavior coordination mechanisms is crucial in order to realize the non-collision safety-ensured movements. A method integrated by behavior coordination and command fusion is proposed. A new approach with five basic behaviors for mobile robot navigation is discussed.Player/ Stage is an open-source software project for research in robotics and sensor systems. Its components include the Player network server and the Stage robot platform simulators providing a hardware abstraction layer to several popular robot platforms. Player is one of the most popular robot interfaces in research. We mainly use Player/Stage simulation to test our algorithms in mono-agent/multi-agent exploration, map reconstruction and robot navigation. Obtained results show that the proposed approaches are effective and can be applied in real robots
Berge-Cherfaoui, Véronique. "Sepia : système évolutif de perception pour un robot mobile." Compiègne, 1992. http://www.theses.fr/1992COMPD541.
Повний текст джерелаMajed, Aliah. "Sensing-based self-reconfigurable strategies for autonomous modular robotic systems." Electronic Thesis or Diss., Brest, École nationale supérieure de techniques avancées Bretagne, 2022. http://www.theses.fr/2022ENTA0013.
Повний текст джерелаModular robotic systems (MRSs) have become a highly active research today. It has the ability to change the perspective of robotic systems from machines designed to do certain tasks to multipurpose tools capable of accomplishing almost any task. They are used in a wide range of applications, including reconnaissance, rescue missions, space exploration, military task, etc. Constantly, MRS is built of “modules” from a few to several hundreds or even thousands. Each module involves actuators, sensors, computational, and communicational capabilities. Usually, these systems are homogeneous where all the modules are identical; however, there could be heterogeneous systems that contain different modules to maximize versatility. One of the advantages of these systems is their ability to operate in harsh environments in which contemporary human-in-the-loop working schemes are risky, inefficient and sometimes infeasible. In this thesis, we are interested in self-reconfigurable modular robotics. In such systems, it uses a set of detectors in order to continuously sense its surroundings, locate its own position, and then transform to a specific shape to perform the required tasks. Consequently, MRS faces three major challenges. First, it offers a great amount of collected data that overloads the memory storage of the robot. Second it generates redundant data which complicates the decision making about the next morphology in the controller. Third, the self reconfiguration process necessitates massive communication between the modules to reach the target morphology and takes a significant processing time to self-reconfigure the robotic. Therefore, researchers’ strategies are often targeted to minimize the amount of data collected by the modules without considerable loss in fidelity. The goal of this reduction is first to save the storage space in the MRS, and then to facilitate analyzing data and making decision about what morphology to use next in order to adapt to new circumstances and perform new tasks. In this thesis, we propose an efficient mechanism for data processing and self-reconfigurable decision-making dedicated to modular robotic systems. More specifically, we focus on data storage reduction, self-reconfiguration decision-making, and efficient communication management between modules in MRSs with the main goal of ensuring fast self-reconfiguration process
Meftouh, Fouad. "Système de commande temps-réel multi-agents." Toulouse, ENSAE, 1993. http://www.theses.fr/1993ESAE0029.
Повний текст джерелаRogovchenko, Olena. "Abstractions for time and resource conscious composition in the context of distributed autonomous robotic systems." Paris 6, 2010. http://www.theses.fr/2010PA066659.
Повний текст джерелаEne, Cristian. "Un modèle formel pour les systèmes mobiles à diffusion." Aix-Marseille 2, 2001. http://www.theses.fr/2001AIX22061.
Повний текст джерелаSegovia, de los Rios José Armando. "Étude des déplacements d'un robot mobile dans un environnement peu contraint." Compiègne, 1993. http://www.theses.fr/1993COMPD597.
Повний текст джерелаIsmail, Leila. "Infrastructure système pour applications réparties à base d'agents mobiles." Grenoble INPG, 2000. http://www.theses.fr/2000INPG0072.
Повний текст джерелаMekhaldi, Fouzi. "Partitionnement dans les réseaux mobiles Ad-hoc : conception et évaluation de protocoles auto-stabilisants et robustes." Thesis, Paris 11, 2011. http://www.theses.fr/2011PA112342.
Повний текст джерелаThis dissertation is focused on fault-tolerant distributed algorithms adapted to large scale mobile networks.Self-stabilization is a fault-tolerance approach suited for systems with transient disruptions, but not for large scale dynamic networks.The fault is due to the eventual total lack of service when faults occur frequently.To address this drawback, we have introduced the robust self-stabilization approach that improves the service guarantee during the stabilization phase.The service guarantee provided by the robust self-stabilization is achieved via:(1) fast recovery to a minimum service and(2) preservation of minimum service during the convergence to an optimum service despite the occurrence of highly tolerated disruptions.Having the robust self-stabilization property ensures a high availability of the system despite the occurrence disruptions and topological changes in the network.In this thesis, we propose, evaluate and prove a series of robust self-stabilizing protocols.At first, we propose two robust self-stabilizing protocols for both problems : clustering and the maintain of knowledge about neighbor clusters.The two protocols are written in the local shared memory model and operate under the assumption of a weakly fair distributed daemon.The clustering protocol, called R-BSC, gathers the network nodes into 1-hop clusters.It allows a best choice of leaders, and it builds clusters with limited size in order to balance the load between leaders.The protocol R-BSC quickly provides, after at most 4 rounds, a minimum service where the network is completely partitioned into bounded-size clusters.During the convergence towards an optimum service, in which leaders will be the most appropriate nodes and their number will be reduced locally, the minimum service is preserved.The protocol for knowledge of neighbor clusters, called R-CNK, allows each leader to know the identity of leaders of neighbor clusters, paths leading to them, and the composition (list of ordinary nodes) of its neighbor clusters.The minimum service provided by of R-CNK protocol, reached after 4 rounds, ensures that every leader always knows paths towards all the leaders of neighbor clusters.We conducted an experimental study using the simulator NS2 to evaluate and to compare the performance of our protocols (R-BSC and R-CNK) with those of their self-stabilizing version in the context of mobile networks.This study confirmed that our protocols R-BSC and R-CNK offer a better service guarantee
Martin-Guillerez, Damien Banâtre Michel. "Mécanismes de prise de points de reprise opportunistes pour robots mobiles autonomes." Rennes : [s.n.], 2009. ftp://ftp.irisa.fr/techreports/theses/2009/martin-guillerez.pdf.
Повний текст джерелаGhazouani, Haythem. "Navigation visuelle de robots mobiles dans un environnement d'intérieur." Phd thesis, Université Montpellier II - Sciences et Techniques du Languedoc, 2012. http://tel.archives-ouvertes.fr/tel-00932829.
Повний текст джерелаGherbi, Tahar. "Une démarche d'ingénierie dirigée par les modèles pour le développement d'applications mobiles." Lorient, 2014. http://www.theses.fr/2014LORIS331.
Повний текст джерелаMobile agents facilitate the implementation of dynamically adaptable applications and provide a generic framework to develop distributed applications on large networks. Applications based on mobile agents are being developed in industry, government and academia; and experts predict the use of mobile agents in many Internet applications in the coming years. Generally, the development of mobile-agents applications is done without considering the "mobility" aspect in the analysis and design phases; this aspect is often treated at the implementation phase. Considering it earlier (i. E. , in the analysis and design phases), allows for a better design of this kind of applications. However, little research has focused on methods and tools of analysis and design of mobiles-agents applications. According to literature, modeling these applications can be done with three approaches: design patterns approach, formal approach and semi formal approach which includes formalisms extending Unified Modeling Language notations and approaches extending a multi-agents systems development methodology. Because multi-agents systems are relevant to design applications, we are interested in extending a multi-agents systems development methodology to support mobility. On another hand, model driven engineering helps to reduce the gap between multi-agents systems development methodologies (as the majority does not include an implementation phase) and runtime platforms. It also facilitates the moves of mobiles-agents across heterogeneous platforms, by transferring the agent’s model rather than its code. Consequently, this work considers "mobility" in the design phase and proposes a model driven engineering approach to develop multi-agents systems supporting mobility. Many multi-agents systems development methodologies exist. None is universal and there is no standard meta-model to design multi-agents systems; it is why we have looked for a meta-model which is simple, modular, general and scalable. Our choice fell on the conceptual meta- model of MDAD (Model Driven Agent Development) methodology which we extended to support mobilityand used it as the PIMM (Platform Independent Meta -Model) of our approach. To illustrate this latter, an application example “Find locations of a book through a network” has been developed (from modeling to code generation). JAVACT, a runtime platform for mobile agents, was used, a PSMM (Platform Specific Meta -Model) was built for it and rules for (PIMM-to-PSMM) transformation and code generation from the PSM obtained have been developed
Lim, Léon. "Gestion de groupe partitionnable dans les réseaux mobiles spontanés." Thesis, Evry, Institut national des télécommunications, 2012. http://www.theses.fr/2012TELE0032/document.
Повний текст джерелаIn Mobile Ad hoc NETworks or MANETs, partitionable group membership is a basic service for building partition-tolerant applications. None of the existing specifications satisfy the two following antagonistic requirements: 1) it must be strong enough to simplify the design of partition-tolerant distributed applications in partitionable systems; 2) it must be weak enough to be implantable. In this thesis, we propose a solution to partitionable group membership in very dynamic network environment such as MANETs. To this means, we proceed in three steps. First, we develop a dynamic distributed system model that characterises stability in MANETs. Then, we propose a solution to the problem of partitionable group membership by adapting Paxos for such systems. This adatation results in a specification of abortable consensus AC which is composed of an eventual α partition-participants detector ♢PPD and an eventual register per partition ♢RPP. ♢PPD guarantees liveness in a partition even if the partition is not completely stable whereas ♢RPP ensures safety in the same partition. Finally, partitionable group membership is solved by transforming it into a sequence of abortable consensus instances AC. Each of the modules ♢PPD, ♢RPP, AC, and partitionable group membership is implanted and proved. Next, we analyse the performances of ♢PPD by simulation
Belec, Yves. "Des règles expertes pour une méthode applicative d'analyse ou de génération du langage naturel." Toulouse 3, 1990. http://www.theses.fr/1990TOU30136.
Повний текст джерелаColle, Olivier. "Vision stéréoscopique à l'aide de deux cameras linéaires." Lyon, INSA, 1990. http://www.theses.fr/1990ISAL0080.
Повний текст джерела[We propose a simple, passive and cheap sensor mobile robots. It's constituted with two linear array cameras, arranged so that they admit a commune vision area, this area being an horizontal plan in which the coordinates of the points of the scene are measured by triangulation. Like in stereo vision with ordinary cameras, the major problem is the matching of the right and left images. The detected edges in every edges in every linear image are followed up during the robot motion, by a simple prediction/decision method. This provides, for every so called spatio-temporal edge, a function x(t) which depicts its shift along the line. Taking account to this information allows first a noise filtering second to express a strong matching constraint : the x(t) functions ad corresponding right and left edges must be dependant and the hypothesis of a static scene might be sufficient to produce certain matches. The experimental results provided by a simple algorithm prove first, the feasibility of the sensor, and second, the benefit of the association of binocular vision and dynamic-vision Indeed, such a process appears efficient and feasible in real time with linear array cameras. ]
Allart, Benjamin. "Intégration de filtres de poursuite pour le suivi de fauteuil roulant à partir d’une base mobile." Valenciennes, 2011. https://ged.uphf.fr/nuxeo/site/esupversions/d5d6b886-1f1f-4ae8-8df2-1c1c77e16f09.
Повний текст джерелаThe Project of this thesis proposed to study the technical, psychological and clinical impacts of a robotics assistant used by people with reduce mobility in using a mobile platform with a prehensive arms classicaly used in robotics for the handicap. The prehensive dimension is based on the using og the only one prehensor developed for the person’s assistance : The MANUS arms. The contribution of our team is based on the autonomous navigation problematic for the mobile platform. The association of this two technologies have for ambition to extend the assistance possibility actually limited
Vignéras, Pierre. "Vers une programmation locale et distribuée unifiée au travers de l'utilisation de conteneurs actifs et de références asynchrones." Bordeaux 1, 2004. http://www.theses.fr/2004BOR12883.
Повний текст джерелаJiang, Wei. "Contrôle de la formation et du confinement variable dans le temps et entièrement distribué pour les systèmes multi-agents/ multi-robots." Thesis, Ecole centrale de Lille, 2018. http://www.theses.fr/2018ECLI0016/document.
Повний текст джерелаThis thesis deals with the time-varying formation and containment control for linear time-invariant multi-agent systems with heterogeneity considering constant / time-varying input / output delays and matched / mismatched disturbances under directed and fixed communication topology. New formats of time-varying formation shapes for homogeneous and heterogeneous systems are proposed. The controllers, which are designed based on predictive and adaptive techniques with observer technique, are fully distributed and can be applied to large-scale systems. The application on linearized heterogeneous multi mobile robot systems is verified
Clément, Julien. "Algorithmique probabiliste pour systèmes distribués émergents." Paris 11, 2009. http://www.theses.fr/2009PA112231.
Повний текст джерелаMobile sensor networks have appeared in computer science several years ago. Some of these networks’ characteristics are new: sensors are small, with few memory; they can be corrupted easily and are mobile. Moreover, they may contain thousands of entities. For computer science, the stake is huge. All these new properties are a challenge for us, algorithm creators. It is necessary to adapt our methods and to make sure that from an algorithmic point of view, these new systems will function correctly in the years to come. The theoretical difficulty and the stake of these issues transform them into an interesting and exciting research subject. The goal this thesis is to reconsider some of the algorithms created for classical networks in order to make them performing on these new networks. We did not restrain ourselves to mobile sensor networks and also considered other recent systems. Also, we always introduced probability in order to unblock impossibilities or to improve the performance of the algorithms. We obtained different results on several kinds of new networks as peer to peer networks, robots networks or mobile sensor networks in which we extend the population protocol model. Finally, we introduced a formal model in order to prove that at some level of abstraction, there are very strong connections between the various types of networks, or at least between the models describing them
Aviña, Cervantes Juan Gabriel Devy Michel. "Navigation visuelle d'un robot mobile dans un environnement d'extérieur semi-structuré." Toulouse : INP Toulouse, 2005. http://ethesis.inp-toulouse.fr/archive/00000163.
Повний текст джерелаAviña, Cervantes Juan Gabriel. "Navigation visuelle d'un robot mobile dans un environnement d'extérieur semi-structuré." Toulouse, INPT, 2005. http://ethesis.inp-toulouse.fr/archive/00000163/.
Повний текст джерелаThis thesis deals with the automatic processing of color images, and its application to robotics in outdoor semi-structured environments. We propose a visual-based navigation method for mobile robots by using an onboard color camera. The objective is the robotization of agricultural machines, in order to navigate automatically on a network of roads (to go from a farm to a given field) [. . . ]
Bouzid, Zohir. "Modèles et algorithmes pour les systèmes émergents." Paris 6, 2013. http://www.theses.fr/2013PA066589.
Повний текст джерелаNetworks of autonomous robots are mobile entities that communicate only through their movements and the observation of their respective positions. They are anonymous, without memory and without a global coordinate system nor a common notion of distance. We focus on the algorithmic study of the problems of gathering and convergence of robots when some of them may be subject to failures. Our first contribution is of geometric nature. We provide a protocol to compute the Weber point of a large class of rotational symmetric configurations. Based on this primitive, we present an algorithm that solves thegathering problem in presence of any number of crash failures. Then, we address the convergence problem when robots may incur byzantine failures which are harder to handle than crash failures. We provide several tight bounds relating the degree of synchronicity of the system to its resiliency. Finally, we study robots that are endowed with memory and we show that this model is stronger than the message passing model. The different node types in an uniformized manner. Our experimental results show that this model is able to take in account the correlations between labels of different node types
Grasse, Régis Pruski Alain. "Aide à la navigation pour les personnes handicapées reconnaissancede trajets /." [S.l.] : [s.n.], 2007. ftp://ftp.scd.univ-metz.fr/pub/Theses/2007/Grasse.Regis.SMZ0740.pdf.
Повний текст джерелаSahnoun, M'hamed Bourhis Guy. "Conception et simulation d'une commande à retour d'effort pour fauteuil roulant électrique." [S.l.] : [s.n.], 2007. ftp://ftp.scd.univ-metz.fr/pub/Theses/2007/Sahnoun.Mhamed.SMZ0739.pdf.
Повний текст джерелаKreutner, Michel Bourhis Guy. "Perception multisensorielle pour le positionnement d'un véhicule autonome dédié aux personnes handicapés moteurs." Metz : Université Metz, 2008. ftp://ftp.scd.univ-metz.fr/pub/Theses/2004/Kreutner.Michel.SMZ0417.pdf.
Повний текст джерелаGlaser, Norbert. "Contribution à l'acquisition et à la modélisation de connaissances dans un cadre multi-agents : l’approche CoMoMAS." Nancy 1, 1996. http://www.theses.fr/1996NAN10300.
Повний текст джерелаCharbonnier, Laurent. "Localisation d'un robot mobile par mise en correspondance de cartes télémétriques : utilisation du concept de ressemblance." Montpellier 2, 1996. http://www.theses.fr/1996MON20098.
Повний текст джерелаHaddar, Mohamed Amine. "Codage d’algorithmes distribués d’agents mobiles à l’aide de calculs locaux." Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14429/document.
Повний текст джерелаToday, distributed systems must satisfy increasinglynew requirements for quality of service and the emergence ofnew applications such as Grid Computing, whichgenerally results in requirements of dynamicity andmobility. If satisfactory solutions exist forstatic distributed environments, they are inadequate in the casewhere the system becomes dynamic (mobility, evolution,components change). Indeed, the design of distributed algorithms istraditionally based on the assumption of a network whosetopology is static. Our goal, in this thesis, is to defineand study a model based on mobile agents to implementand execute distributed algorithms encoded by local computations.This model must take into account failures that can alter thethe distributed system operation. It should also improveperformance vis-à-vis the classical models (message passing systems)
Pini, Giovanni. "Towards autonomous task partitioning in swarm robotics: experiments with foraging robots." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209469.
Повний текст джерелаThis limits the applicability of these methods to the specific contexts for which they have been built. The work presented in this thesis represents the first steps towards a general framework for autonomous task partitioning in swarms of robots. We study task partitioning in foraging, since foraging abstracts practical real-world problems. The approach we propose in this thesis is therefore studied in experiments in which the goal is to achieve autonomous task partitioning in foraging. However, in the proposed approach, the task partitioning process relies upon general, task-independent concepts and we are therefore confident that it is applicable in other contexts. We identify two main capabilities that the robots should have: i) being capable of selecting whether to employ task partitioning and ii) defining the sub-tasks of a given task. We propose and study algorithms that endow a swarm of robots with these capabilities.
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished
Borzone, Tommaso. "Decentralized control of multi-agent systems : a hybrid formalism." Thesis, Université de Lorraine, 2019. http://www.theses.fr/2019LORR0078/document.
Повний текст джерелаOver the last years, multi-agents problems have been extensively studied from the control theory community. One of the most popular multi-agents control topics is the consensus problem where a group of agents reaches an agreement over the value of a certain parameter or variable. In this work we focus our attention on the consensus problem of networks of non-linear reference tracking agents. In first place, we use sporadic interactions modeled by relative sensing to deal with the decentralized consensus of the references. The reference is therefore feeded the tracking dynamics of each agent. Differently from existent works, the stability analysis of the overall system required the usage of hybrid systems theory tools, due to dual nature of the two stages approach. The analysis is carried out considering different scenarios of network topology and interactions. For each case a stability sufficient condition in terms of the minimum allowed time between two consecutive reference updates is provided. The proposed framework is applied to the rendez-vous and formation realisation tasks for non-holonomic mobile robots, which appear among the richest research topics in recent years. The same problem is addressed in the context of a real field application, namely a fleet management system for a group of robotic vehicles deployable in an industrial environment for monitoring and data collection purpose. The development of such application was motivated by the fact that this thesis is part of the Future of Factory Lorraine (FFLOR) project, developed by the technological research department of the Commissariat à l'énergie atomique et aux énergies alternatives (CEA tech)
Hussein, Mohammad. "Un modèle d'exécution à base d'agents mobiles pour l'optimisation dynamique de requêtes réparties à grande échelle." Toulouse 3, 2005. http://www.theses.fr/2005TOU30203.
Повний текст джерелаPark, Young-Hwan. "Etude en vue de la réalisation d'un noyau temps réel multiprocesseur et l'environnement de développement intégré." Compiègne, 1997. http://www.theses.fr/1997COMP0992.
Повний текст джерелаThe purpose of my thesis is to realize a real-time multiprocessor kernel, called MLINDA, over the LINDA concept and the GIDOR concept. LINDA is a parallel programming model. It consists the tuple-space, the tuple and four simple tuple-space operations, out(), eval(), in() and read(). Through the LINDA concept, we can develope a parallel program without consideration of information's addresss and of process's synchronisation. The GIDOR (Gestion Integre D'Objets intelligents Repartis : Integrated Management of Distributed intelligent Objects) is a new concept in the domain of embadded real-time parallel processing. This concept consists OR (Objet intelligent Repartis : Distributed intelligent Object) in the material level and Noyau d'OR (OR Kernel) in the software level. An OR is a chip that has the nearly same size with the conventional processors. But it contains a processing unit, a local memory, and several communication ports. If we have not enough memory for a large real-time application, we utilize several ORs. As a consequence, the GIDOR concept contains the real-time parallel processing. For the management of Inter Process Communications (IPC), of the real-time process, and of the system resources, a small real-time multiprocessor kernel, Noyau d'OR, is located in each OR. We have realized a Noyau d'OR, which is called MLINDA, over the ADSP2106x of Analog Deviees. ADSP2106x is a kind of OR. We have also implemented a real-time parallel program developement environment. In this environment, there are a real-time parallel programming tool, a deadlock detection tool, and a performance evaluation tool. And we have evaluated the stability and the efficiency of MLINDA with two mobil robot vision systems, a real-time movement detection and tracking system and a real-time image fusion system
Salmon, Loïc. "Une approche holistique combinant flux temps-réel et données archivées pour la gestion et le traitement d'objets mobiles : application au trafic maritime." Thesis, Brest, 2019. http://www.theses.fr/2019BRES0006/document.
Повний текст джерелаOver the past few years, the rapid prolifération of sensors and devices recording positioning information regularly produces very large volumes of heterogeneous data. This leads to many research challenges as the storage, distribution, management,Processing and analysis of the large mobility data generated still needs to be solved. Current works related to the manipulation of mobility data have been directed towards either mining archived historical data or continuous processing of incoming data streams.The aim of this research is to design a holistic System whose objective is to provide a combined processing of real time data streams and archived data positions. The proposed solution is real-time oriented, historical data and informations extracted from them allowing to enhance quality of the answers to queries. A event paradigm is discussed to facilitate the hybrid approach and to identify typical moving objects behaviors. Finally, a query concerning signal coverage of moving objects has been studied and applied to maritime data showing the relevance of a hybrid approach to deal with moving object data processing
Pham, Van Thiem. "Contrôle coopératif des systèmes multi-agents dans un réseau en cluster." Thesis, Reims, 2021. http://www.theses.fr/2021REIMS002.
Повний текст джерелаHaving multiple autonomous agents to work together efficiently to achieve collective group behaviors is usually referred to as cooperative control of multi-agent systems (MASs). Cooperative control of MASs has received compelling attention from various scientific communities, especially the systems and control community. An arise from the fact that agents in MASs are usually resource-limited, such as limited ranges of wireless communication (for exchanging information among agents), sensors (for measuring relative information between neighboring agents) and actuators (for driving the agents), as well as energy constraints related to long time interactions, an engineer should sometimes partition a large network into clusters. We first address the problem of consensus in the clustered network, where each node of the network graph represents an agent with linear dynamics. The cooperative behavior of linear MASs with general system dynamics in the clustered network is defined by not only the dynamical control protocols concerning the isolated clusters but also the discrete interactions among the leaders. This makes a consensus problem in the clustered network with general linear agents much more challenging than that of the integrator case. Thus, an impulsive observer-based control is proposed to handle the consensus problem. Next, we study the formation control problem in clustered network systems of linear agents that are subjected to state constraints. The continuous-time communication structure in each cluster is represented by a fixed and undirected graph. To do this, a robust formation protocol, which deals with the continuous-time communication inside clusters and discrete-time information exchange between clusters, is introduced. It is then shown that the considered robust formation control problem can be indirectly solved by studying the robust stability of an equivalent system based on matrix theory and algebraic graph theory. Moreover, it shows the important role of communication between leaders at some specific discrete instants, represented by the stochastic matrix. Finally, we discuss the output consensus problem in the clustered networks composed of heterogeneous MASs that are subjected to different disturbances. Each cluster is represented by a fixed and directed graph. A dynamic internal reference model for each agent is introduced, which takes into account the continuous-time communications among internal reference models in virtual clusters and discrete information exchanges between those virtual clusters. Therefore, the output consensus of heterogeneous agents is indirectly solved through the consensus of the virtual references. To achieve that, a hybrid consensus control protocol is proposed for the virtual clustered network. Thanks to results from matrix theory and algebraic graph theory, the consensus of the virtual clustered network is solved. A sufficient and necessary condition is derived for the output consensus of linear heterogeneous agents under different disturbances in the clustered network
Wasielewski, Sandrine. "Contribution à l'étude d'un système de localisation 3D par vision monoculaire pour un véhicule sous-marin." Montpellier 2, 1997. http://www.theses.fr/1997MON20149.
Повний текст джерелаGuermeur, Philippe. "Vision robotique monoculaire : reconstruction du temps-avant-collision et de l'orientation des surfaces à partir de l'analyse de la déformation." Rouen, 2002. http://www.theses.fr/2002ROUES053.
Повний текст джерелаThis thesis presents a method to process axial monocular image sequences for evaluation of the time to collision and the surface orientation in a scene. Using a planar facet representation of the scene, we first calculate formally the apparent velocity field generated by the camera motion as a function of the 3-D facet model and the motion hypothesis. A global deformation model is calculated using the Green and Stokes theorems to integrate the normal and tangential components of the vector field and connect the results with the parameters to be identified In practice, the vector field is computed using the epipolar constraint, and the camera is fitted with a wide angle lens. Using the epipolar model needs accurate camera calibration in order to compensate for image distortion and fit the pinhole model. To this end, we introduce a new method based on evolutionary optimisation to determine the distortion coefficients, based on the EASEA evolutionary specification language
Kreutner, Michel. "Perception multisensorielle pour le positionnement d'un véhicule autonome dédié aux personnes handicapés moteurs." Metz, 2004. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/2004/Kreutner.Michel.SMZ0417.pdf.
Повний текст джерелаThe work of this thesis deals with localization mode developed within the VAHM project framework (Autonomous Vehicle for Disabled People). The procedure is realized in moving and uses odometric, ultrasonic and vision sensors. Firstly ultrasonic measurements make it possible to adjust the odometric position by using the method of least squares. Then vision allows to adjust the orientation of the vehicle by determining the angle of sight of the known characteristics of the environment. We detail the implemented structures to record the data and the algorithms developed for their treatment. Several series of tests are carried out in simulation and real conditions which make it possible to establish the possibilities of obtaining the performances sought in the context of the project to knowing an error of position lower than 5 cm and an error of orientation lower than 3 deg
Ergenç, Belgin. "Un modèle d'exécution de requêtes mobiles pour des sources à accès restreints en environnement d'intégration de données." Toulouse 3, 2008. http://thesesups.ups-tlse.fr/168/.
Повний текст джерелаQuery optimization in data integration systems over large scale network, faces the challenges of dealing with autonomous, heterogeneous and distributed data sources, dynamic execution environment and changing user requirements. These issues initiate the need for crafting the traditional optimization methods in a way to produce stable query execution plans, use execution models which are able to adapt to run-time conditions and handle source restrictions. Centralization of the control in adaptive optimization methods result in bottleneck due to large amounts of message passing towards to the site of the central authority over large scale network where network bandwidth is low and network latency is high. In order to overcome this obstacle adaptive query optimization requires decentralized methods. A mobile execution model with mobile relational operators that are able to adapt in an autonomous way and focus on reducing of transfer cost is worth considering in large scale distributed data integration environment. However, this mobile query execution model needs to be extended with new operators to handle source restrictions. In this perspective we propose mobile relational operators developed for restricted sources. Another proposition is related with initial placement of mobile relational operators. The challenge is on defining a placement which would allow acceptable performance instead of a good placement which would cause dramatic performance sometimes at run-time. Finally we present and analyze a performance evaluation on the methods proposed
Autefage, Vincent. "Découverte de services et collaboration au sein d'une flotte hétérogène et hautement dynamique d'objets mobiles communicants autonomes." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0205/document.
Повний текст джерелаWe call autonomous systems, mobile and communicating objects which are able to perform several tasks without any human intervention. The overall cost (including price, weight and energy) of the payload required by some missions is sometimes too important to enable the entities to embed all the required capabilities (i.e. sensors and actuators). This is the reason why it is more suitable to spread all the capabilities among several entities. The team formed by those entities is called a swarm. It then becomes necessary to provide a discovery mechanism built into the swarm in order to enable its members to share their capabilities and to collaborate for achieving a global mission.This mechanism should perform task allocation as well as management of conflicts and failures which can occur at any moment on any entity of the swarm. In this thesis, we present a novel collaborative system which is called AMiRALE for heterogeneous swarms of autonomous mobile robots. Our system is fully distributed and relies only on asynchronous communications. We also present a novel tool called NEmu which enables to create virtual mobile networks with a complete control over the network topology, links and nodes properties. This tool is designed for performingrealistic experimentation on prototypes of network applications. Finally, we present experimental results on our collaborative system AMiRALE obtained through a park cleaning scenario which relies on an autonomous swarm of drones and specialized ground robots
Bouchard, Sébastien. "On the Deterministic Gathering of Mobile Agents." Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS175.
Повний текст джерелаDistributed systems are a theoretical model with a huge application field. It can represent a multitude of systems in which several autonomous entities cooperate to achieve a common task. The applications range from computer science related ones like processes sharing memory inside a computer, computers exchanging messages, and cohorts of robots to understanding social animals behavior. When the entities involved are able to move spontaneously, they are called mobile agents, and one of the most studied problems regarding mobile agents is gathering. The mobile agents are spread in an unknown environment, with no a priori information about the others and without the ability to communicate with other agents, unless colocated. Each of them gradually discovers its surroundings, meets some other agents, coordinates with them, until all agents are gathered and detect it. Once all agents gathered, they can communicate and coordinate for some future task. This thesis addresses the feasibility and complexity of gathering, in particular when facing two major difficulties: asynchrony and occurrence of Byzantine faults. When tackling the former, the agents have no control over their speed, which can vary arbitrarily and independently from each other. This makes coordination more challenging. When facing the latter, some of the agents are Byzantine, they can be viewed as malicious and using the difficulty to distinguish them from other (good) agents to try to prevent the gathering
Iguchi-Cartigny, Julien. "Contributions à la diffusion dans les réseaux ad hoc." Lille 1, 2003. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/2003/50376-2003-229.pdf.
Повний текст джерелаShawky, Mohamed. "Architectures parallèles, vision et véhicules autonomes : étude et mise en oeuvre." Compiègne, 1992. http://www.theses.fr/1992COMP0532.
Повний текст джерелаKherdali, Khalil el. "Etude, conception et réalisation d'un radar ultrasonore." Montpellier 2, 1992. http://www.theses.fr/1992MON20122.
Повний текст джерелаHayet, Jean-Bernard. "Contribution à la navigation d'un robot mobile sur amers visuels texturés dans un environnement structuré." Toulouse 3, 2003. http://www.theses.fr/2003TOU30026.
Повний текст джерелаBaba, Abdellatif. "Cartographie de l'environnement et suivi simultané de cibles dynamiques par un robot mobile." Phd thesis, Université Paul Sabatier - Toulouse III, 2007. http://tel.archives-ouvertes.fr/tel-00260984.
Повний текст джерелаLerasle, Frederic. "Perception pour la robotique mobile en environnement humain." Habilitation à diriger des recherches, Université Paul Sabatier - Toulouse III, 2008. http://tel.archives-ouvertes.fr/tel-00355083.
Повний текст джерелаBenchi, Abdulkader. "Middleware Systems for Opportunistic Computing in Challenged Wireless Networks." Thesis, Lorient, 2015. http://www.theses.fr/2015LORIS372/document.
Повний текст джерелаOpportunistic networks (OppNets) constitute an appealing solution to complement fixed network infrastructures –or make up for the lack thereof– in challenged areas. Researches in the last few years have mostly addressed the problem of supporting networking in OppNets, yet this can only be a first step towards getting real benefit from these networks. Opportunistic computing goes beyond the concept of opportunistic networking, and provides a new paradigm to enable collaborative computing tasks in such environments. In the realm of opportunistic computing, properly designing, implementing and deploying distributed applications are important tasks. An OppNet-dedicated application must be able to operate and maintain an acceptable level of service while addressing the many problems that can occur in these networks, such as disconnections, partitioning, long transmission delays, transmission failures, resource constraints, frequent changes in topology, and heterogeneous devices. Much of the complexity and cost of building OppNet-dedicated applications can be alleviated by the use of high-level programming models. Such models can be supported by middleware systems capable of transparently addressing all the above-mentioned problems. The work reported in this dissertation focused on providing insight into the fundamental problems posed by OppNets, so as to analyze and solve the problems faced by application developers while dealing with these environments. The research focused on identifying well-known high-level programming models that can be satisfactorily implemented for OppNets, and that can prove useful for application developers. In order to demonstrate the feasibility of application development for OppNets, while assessing the benefits brought about by carefully designed middleware systems, a couple of such systems have been designed, implemented, and evaluated as part of this work. These middleware systems respectively support distributed messaging (through message queues and topics), the tuple-space model, and consensus solving in OppNets. They are supplemented with fully-functional implementations, that can be used in real settings, and that are all distributed under the terms of the GNU General Public License (GPL). Real-life experiments and simulations have been realized so as to evaluate the effectiveness and efficiency of these systems in real conditions