Literatura científica selecionada sobre o tema "Flottes de drones"
Crie uma referência precisa em APA, MLA, Chicago, Harvard, e outros estilos
Consulte a lista de atuais artigos, livros, teses, anais de congressos e outras fontes científicas relevantes para o tema "Flottes de drones".
Ao lado de cada fonte na lista de referências, há um botão "Adicionar à bibliografia". Clique e geraremos automaticamente a citação bibliográfica do trabalho escolhido no estilo de citação de que você precisa: APA, MLA, Harvard, Chicago, Vancouver, etc.
Você também pode baixar o texto completo da publicação científica em formato .pdf e ler o resumo do trabalho online se estiver presente nos metadados.
Artigos de revistas sobre o assunto "Flottes de drones"
Aschmann, Marcel, e Hubert Vogl. "So will die Luftfahrtbranche nach der Krise wieder durchstarten". Logistik für Unternehmen 35, n.º 07-08 (2021): 55–61. http://dx.doi.org/10.37544/0930-7834-2021-07-08-55.
Texto completo da fonteZapp, Kerstin. "CO2-Regulierung und Kosten der Batterie: Ausweg Leichtbau?" Internationales Verkehrswesen 64, n.º 2 (1 de março de 2012). http://dx.doi.org/10.24053/iv-2012-0045.
Texto completo da fonteTeses / dissertações sobre o assunto "Flottes de drones"
Zagar, Maxime. "Set-membership estimation and distributed control for a fleet of UAVs for target search and tracking". Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPAST164.
Texto completo da fonteThis thesis addresses the problem of searching and tracking an unknown number of mobile targets spread within an unknown Region of Interest (RoI) using a fleet of cooperating Unmanned Aerial Vehicles (UAVs). Such Cooperative Search, Acquisition, and Tracking (CSAT) problem appears in military contexts, e.g., when enemy vehicles have to be found and tracked, or in civilian applications, e.g., when searching for lost people after a disaster. To solve the CSAT problem, each UAV embeds a Computer Vision System (CVS) consisting of a camera and image processing algorithms that provide measurements related to the RoI. The CVS measurements consist of images with labeled pixels, depth maps, and boxes in the images containing pixels related to the detected and identified targets. This thesis considers a set-membership approach to address the CSAT problem. Compared to alternative approaches relying on stochastic assumptions on the measurement noise, set-membership approaches assume bounded measurement noise with known bounds. Set-membership approaches can then characterize sets that are guaranteed to contain the location of the targets, provided that the hypotheses on the measurement models and noise bounds are satisfied. Very few previous works directly exploit CVS measurements in a set-membership approach. This is mainly because obtaining measurement models for a CVS involving deep learning algorithms is difficult. To address these issues, we introduce several assumptions to relate the CVS measurements with the targets and obstacles present in the RoI using a geometric approach. With these assumptions, we propose a new set-membership estimator that directly exploits the CVS measurements to characterize sets that are guaranteed to contain the location of each identified target. The CVS measurements are also exploited to evaluate sets that are guaranteed to contain no target location. A prediction-correction scheme similar to the Kalman filter has been considered to account for the exchange of information between UAVs. The correction involves CVS measurements acquired by each UAV and estimates shared by neighboring UAVs. Several additional sources of uncertainty may be considered in the proposed approach. We have focused on the state uncertainty of UAVs. As the RoI is cluttered with unknown obstacles, each UAV builds an occupancy-elevation map during the search and tracking of targets using CVS measurements. The map provides an approximate description of the location, height, and shape of the obstacles. The map may be exploited for obstacle avoidance. In this thesis, it is used to predict the occlusion by obstacles in the field of view of each UAV. This information is instrumental in the design of a Model Predictive Control (MPC) algorithm to determine the trajectory of each UAV, minimizing the localization uncertainty of identified targets and reducing the size of the set containing potentially undetected targets. If the targets outnumber the UAVs, a trade-off has to be found between searching for new targets and tracking those already identified to reduce the localization uncertainty. Simulations performed with Webots illustrate the performance of the target location estimator and the MPC design by evaluating the efficiency of the cooperating UAVs to explore the environment, find and identify the targets, and maintain an accurate estimation of their location
Maxa, Jean-Aimé. "Architecture de communication sécurisée d'une flotte de drones". Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30102/document.
Texto completo da fonteAdvances in miniaturization of embedded systems have helped to produce small Unmanned Aerial Vehicles (UAVs) with highly effective capacity. In order to improve their capability in civilian complex missions (for instance, to bypass an obstruction), it is now possible to deploy UAV swarms, in which cooperative UAVs share different tasks. This type of operations needs a high level of coordination between UAVs and Ground Control Station (GCS) through a frequent exchange of information. The communication capabilities are therefore an important objective to achieve for effective UAV swarm operations. Several communication architectures can be used to allow communication between UAVs and GCS. Ad hoc network is one of them and is an effective and promising solution for multi-UAV systems. Such a network is called UAANET (UAV Ad hoc Network) and is an autonomous system made of a UAV swarm and one or several GCS (Ground Control Station). This network can also be considered as a sub category of the well-known MANET (Mobile Ad hoc network). However, it has some specific features (such as node velocity, specific mobility model) that can impact performance of routing protocols. Furthermore, the nature of the wireless medium, along with the lack of fixed infrastructure, which is necessary to verify node and message authentication, create security breaches. Specifically, given the critical characteristic of the real-time data traffic, message authentication proves to be an important step to guarantee the security of the final UAS (composed of UAV swarm). Security of routing protocols has been widely investigated in wired networks and MANETs, but as far as we are aware, there is no previous research dealing with the security features of UAANET routing protocols. Those existing solutions can be adapted to meet UAANET requirements. With that in mind, in this thesis, we propose a secure and reliable communication architecture for a UAV swarm. In this work, the creation of UAANET has first been concieved. In order to do this, we studied the impact of existing MANET routing protocols into UAANET to assess their performance and to select the best performer as the core of our proposed secure routing protocol. Accordingly, we evaluated those existing routing protocols based on a realistic mobility model and realistic UAANET environment. Based on this first study, we created a secure routing protocol for UAANET called SUAP (Secure UAV Ad hoc routing Protocol). On the one hand, SUAP ensures routing services by finding routing paths between nodes to exchange real time traffic (remote monitoring video traffic). On the other hand, SUAP ensures message authentication and provides detection to avoid wormhole attack. The SUAP routing protocol is a reactive routing protocol using public key cryptography and hash chains. In order to detect wormhole attack, a geographical leash-based algorithm is used to estimate the correlation between the packet traveled distance and the hop count value. We also contribute to the certification of the secure communication system software through a Model-Driven Development (MDD) approach. This certification is needed to validate the operation of the UAV swarm, especially in cases where it is used to exchange control and command traffic. We used Simulink and Stateflow tools and formal verification tools of Matlab Software to design SUAP routing protocol. The evaluation of the effectiveness of SUAP has been executed both through emulation and real experiment studies. Our results show that SUAP ensures authentication and integrity security services and protects against a wormhole attack. It also provides an acceptable quality of service for real-time data exchanges
Laplace, Rémi. "Applications et services DTN pour flotte collaborative de drones". Phd thesis, Université Sciences et Technologies - Bordeaux I, 2012. http://tel.archives-ouvertes.fr/tel-00795890.
Texto completo da fonteVerdu, Titouan. "Schémas de vol adaptatifs pour l'exploration de nuages par une flotte de drones : principe, mise en œuvre et expérimentations". Thesis, Toulouse, INSA, 2020. http://www.theses.fr/2020ISAT0010.
Texto completo da fonteAtmospheric scientists are constantly seeking to acquire new data that can improve their models of atmospheric phenomena, especially clouds. Current methods are insufficient to collect adequate measurements of cloud dynamics and microphysical parameters related to cloud formation, generating large uncertainties in model formulation. This lack of in-situ data leads meteorologists to find new collection methods.The use of UAVs is now widespread and many applications are emerging in different contexts. Although the use of a single UAV is very popular, the deployment of UAV fleets is still uncommon and is mainly limited to exploring and mapping unknown static environments. A fleet could find its usefulness in other more complex applications such as the monitoring of dynamic phenomena (e.g. oil puddles on the sea, plumes of smoke from a factory, atmospheric phenomena). Research on the coordination of a UAV fleet and the exploration of dynamic environments is not yet complete and many contributions can be made to the current problems in this field.The objective of this thesis is to provide solutions and strategies to explore a dynamic environment such as the evolution of a cloud with a fleet of UAVs, thus providing better temporal and spatial coverage than with a single UAV. This calls for the development of a UAV control and planning architecture that ensures the cooperation of UAVs to carry out the mission in the best possible way. The constraints associated with this type of environment and mission limit the collective work of the fleet. For robustness and efficiency reasons, the system's mechanisms are implemented in a distributed manner, where the UAVs embark the planning processes and communicate directly with each other, rather than through a single station.This thesis was carried out in close collaboration with the NEPHELAE project which aims to collect data in cumulus clouds in order to reconstruct a 4D spatio-temporal model of its evolution. Knowing that classical flight patterns used in autopilots are not efficient to explore such dynamic environments, the main contribution of this thesis is the development and implementation in the PAPARAZZI system of adaptive flight patterns. These flight patterns use real-time sensor measurements to adapt the UAV trajectories to the cloud to be mapped. This action is performed onboard the UAV and without the intervention of an operator. The drone's behavior changes according to the pattern used, enabling the tracking of the cloud edge, the construction of a dense 3D map or the determination of the cloud core.The validation of these new navigation functions was carried out through different simulations combining UAVs simulated in a static then dynamic cloud environment. Subsequently, a first hybrid experiment was carried out before deploying the fleet during a measurement campaign in Barbados in early 2020. This campaign enabled a large number of exploratory flights and cloud tracking in real conditions. In addition to providing results and suggestions for improvements in adaptive flight patterns, it allowed atmospheric scientists to collect important data on clouds that had not been observed until today. In particular, this experiment made it possible to follow a cloud edge with several UAVs simultaneously, thus achieving a first in terms of data collection in a cloud
Sukarno, Setyawan Ajie. "Méthodes d'approximation au problème de routage de véhicule pour une gestion de flotte de drones". Thesis, Valenciennes, Université Polytechnique Hauts-de-France, 2019. http://www.theses.fr/2019UPHF0022.
Texto completo da fonteNowadays, drone plays a big role in civilian purposes, and it will getting bigger and more important in the future. Because of it’s flexibility and versatility, the application of drone is more extensive. Incertain fields of implementation, applying a team of drones will improve the effectiveness and efficiency of the application, such as in search and rescue, military purpose, agriculture and surveillance. Recently, there is a challenging issue to manage a team of drones in order to achieve the given mission. This issue opens many research opportunities, and our project is made to answer this challenge, to develop a platform for managing a fleet of drones. Among several approaches, vehicle routing problem (VRP) is one of a considered study to answer this challenge, in order to allocate the tasks and find the best path for each drone, with several constraints to be considered. There are many methods to solve VRP, and could be categorized into two groups i.e. exact and approximation method. But since VRP is classified as an NP-hard optimization problem, an approximation method is considered to be implemented in this project. Genetic Algorithm (GA), an approximation method which designed by an inspiration to the evolutionary ideas of genetic and natural selection, is applied in this project, since it is one of most used algorithm to solve VRP, among several approximation method. We observed that GA is suitable to be implemented in this project, but when the number of to-be-visited-points is hugely augmented, the number of iterations to get a satisfactory result would be extremely increased. This issue led us to hybridize GA with Clarke and Wright’s saving algorithm (SA) in order to generate the initial population, so that it is no longer randomly generated as usually done. Eventually, this proposed hybrid method can improve the performance of the algorithm very satisfactorily, and reduce the number of iteration more than 90%. Furthermore, a dynamic scenario in VRP is taken into account in this work i.e. an emerge of one or several new points that appear once the mission is already launched, and require a visit by a single drone. To deal with this dynamic scenarios, a Reverse Open Vehicle Routing Problem (ROVRP) is considered to be implemented. We decide to choose a heuristic method in solving the ROVRP, as it is classified as an NP-hard optimization problem, and we prefer to apply Clarke and Wright’s Saving Algorithm (SA) in this project, due to their speed and simplicity. In our point of view, speed is one most considerable thing in choosing algorithm to solve dynamic scenario in VRP. Our proposed method is devided into two phases i.e. clustering and routing. And the experimental results show that our proposed method can give more than 95% accuracy. In order to simulate and investigate the proposed methods, a Graphical User Interface (GUI) is developed. There are some available framework to develop this tool, and Netlogo is considered as the chosen framework
Belkadi, Adel. "Conception de commande tolérante aux défauts pour les systèmes multi-agents : application au vol en formation d'une flotte de véhicules autonomes aériens". Electronic Thesis or Diss., Université de Lorraine, 2017. http://www.theses.fr/2017LORR0183.
Texto completo da fonteIn recent years, the emergence of new technologies such as miniaturization of components, wireless communication devices, increased storage size and computing capabilities have allowed the design of increasingly complex cooperative multi-agent systems. One of the main research axes in this topic concerns the formation control of fleets of autonomous vehicles. Many applications and missions, civilian and military, such as exploration, surveillance, and maintenance, were developed and carried out in various environments. During the execution of these tasks, the vehicles must interact with their environment and among themselves to coordinate. The available communication tools are often limited in scope. The preservation of the connection within the group then becomes one of the objectives to be satisfied in order to carry out the task successfully. One of the possibilities to guarantee this constraint is the training displacement, which makes it possible to preserve the distances and the geometrical structure of the group. However, it is necessary to have tools and methods for analyzing and controlling these types of systems in order to make the most of their potential. This thesis is part of this research direction by presenting a synthesis and analysis of multi-agent dynamical systems and more particularly the formation control of autonomous vehicles. The control laws developed in the literature for formation control allow to carry out a large number of missions with a high level of performance. However, if a fault/failure occurs in the training, these control laws can be very limited, resulting in unstable system behavior. The development of fault tolerant controls becomes paramount to maintaining control performance in the presence of faults. This problem will be dealt with in more detail in this thesis and will concern the development and design of Fault tolerant controls devolved to a fleet of autonomous vehicles according to different configuration/structuring
Bailon-Ruiz, Rafael. "Design of a wildfire monitoring system using fleets of Unmanned Aerial Vehicles". Thesis, Toulouse, INSA, 2020. http://www.theses.fr/2020ISAT0011.
Texto completo da fonteWildfires, also known as forest or wildland fires, are uncontrolled vegetation fires occurring in rural areas that cause tremendous damage to the society, harming environment, property and people. The firefighting endeavor is a dull, dirty and dangerous job and as such, can greatly benefit from automation to reduce human exposure to hazards. Aerial remote sensing is a common technique to obtain precise information about a wildfire state so fire response teams can prepare countermeasures. This task, when performed with manned aerial vehicles, expose operators to high risks that can be eliminated by the use of autonomous vehicles. This thesis introduces a wildfire monitoring system based on fleets of unmanned aerial vehicles (UAVs) to provide firefighters with timely updated information about a wildland fire. We present an approach to plan trajectories for a fleet of fixed-wing UAVs to observe a wildfire evolving over time. Realistic models of the terrain, of the fire propagation process, and of the UAVs are exploited, together with a model of the wind, to predict wildfire spread and plan UAV motion. The approach tailors a generic Variable Neighborhood Search method to these models and the associated constraints. The execution of the planned monitoring mission provides wildfire maps that are transmitted to the fire response team and exploited by the planning algorithm to plan new observation trajectories. Algorithms and models are integrated within a software architecture allowing for execution under scenarios with different levels of realism, with real and simulated UAVs flying over a real or synthetic wildfire. Mixed-reality simulation results show the ability to plan observation trajectories for a small fleet of UAVs, and to update the plans when new information on the fire are incorporated in the fire model
Belkadi, Adel. "Conception de commande tolérante aux défauts pour les systèmes multi-agents : application au vol en formation d'une flotte de véhicules autonomes aériens". Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0183/document.
Texto completo da fonteIn recent years, the emergence of new technologies such as miniaturization of components, wireless communication devices, increased storage size and computing capabilities have allowed the design of increasingly complex cooperative multi-agent systems. One of the main research axes in this topic concerns the formation control of fleets of autonomous vehicles. Many applications and missions, civilian and military, such as exploration, surveillance, and maintenance, were developed and carried out in various environments. During the execution of these tasks, the vehicles must interact with their environment and among themselves to coordinate. The available communication tools are often limited in scope. The preservation of the connection within the group then becomes one of the objectives to be satisfied in order to carry out the task successfully. One of the possibilities to guarantee this constraint is the training displacement, which makes it possible to preserve the distances and the geometrical structure of the group. However, it is necessary to have tools and methods for analyzing and controlling these types of systems in order to make the most of their potential. This thesis is part of this research direction by presenting a synthesis and analysis of multi-agent dynamical systems and more particularly the formation control of autonomous vehicles. The control laws developed in the literature for formation control allow to carry out a large number of missions with a high level of performance. However, if a fault/failure occurs in the training, these control laws can be very limited, resulting in unstable system behavior. The development of fault tolerant controls becomes paramount to maintaining control performance in the presence of faults. This problem will be dealt with in more detail in this thesis and will concern the development and design of Fault tolerant controls devolved to a fleet of autonomous vehicles according to different configuration/structuring
Shrit, Omar. "Automatic coordination of a quadcopters fleet using ad hoc communications". Electronic Thesis or Diss., université Paris-Saclay, 2021. http://www.theses.fr/2021UPASG108.
Texto completo da fonteIn this thesis, we study designing a decentralized controller for a set of quadrotors. The quadrotors are organized as a leader and followers. The leader is human-piloted, while the followers use the decentralized controller to follow the leader. The followers are autonomous and not aware of the leader’s behavior. The novelty of this thesis is to rely on inexpensive sensors such as WiFi modules to estimate the distances toward neighbors’ quadrotors. In order to design the decentralized controller, iterative learning is used and combined with supervised and imitation learning, through several phases, including logs gathering, training forward models, and designing a controller upon it. Then the controller is embedded in the followers, rendering them autonomous. The main advantage of learning methods is to shift the burden of optimization from the online tests step to the data gathering step. Therefore, making this approach is suitable for Commerical Of The Shelf (COTS) robots such as micro and nano quadrotors that do not have considerable computational resources on board. Our methods have been validated using MagicFlock, a home build framework for quadrotors swarm that extends RotorS, a Software In The Loop (SITL) simulation framework built on the top of the physics-based simulator Gazebo. Our results demonstrated that the swarm behavior is achieved when embedded on a set of quadrotors inside Gazebo using the proposed iterative learning methods with a performance similar to a flocking model that uses the absolute positions of the robots
Livros sobre o assunto "Flottes de drones"
MAXA. Conception Orientee Mod de Log Embarqs: Application a la Communication Dans le Cadre d'une Flotte de Drones. ISTE Editions Ltd., 2018.
Encontre o texto completo da fonte