Download or read book D tection diagnostic de pannes pour les drones utilisant la machine learning written by Elgiz Baskaya and published by . This book was released on 2019 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette nouvelle ère de petits UAV qui peuplent actuellement l'espace aérien soulève de nombreuses préoccupations en matière de sécurité, en raison de l'absence de pilote à bord et de la nature moins précise des capteurs. Cela nécessite des approches intelligentes pour faire face aux situations d'urgence qui se produiront inévitablement pour toutes les catégories d'opérations d'UAV telles que définies par l'AESA (Agence européenne de la sécurité aérienne). Les limitations matérielles de ces petits véhicules suggèrent l'utilisation de la redondance analytique plutôt que la pratique habituelle de la redondance matérielle dans l'aviation humaine. Au cours de cette étude, des pratiques d'apprentissage automatique sont mises en œuvre afin de diagnostiquer les défaillances d'un petit drone à voilure fixe afin d'éviter le fardeau de la modélisation précise nécessaire au diagnostic par le modèle. Une méthode de classification supervisée, SVM (Support Vector Machines), permet de classer les défauts.Les données utilisées pour diagnostiquer les défauts sont les mesures de gyroscope et d'accéléromètre. L'idée de restreindre le jeu de données aux mesures d'accéléromètre et de gyroscope est de vérifier la capacité de classification de la méthode, avec un jeu de puces petit et peu coûteux, sans avoir à accéder aux données du pilote automatique, telles que les informations d'entrée de commande. Ce travail aborde les défauts dans les surfaces de contrôle d'un UAV. Plus précisément, les défauts considérés sont la surface de contrôle coincée en angle et la perte d'efficacité.Tout d'abord, un modèle d'aéronef est simulé. Ce modèle n'est pas utilisé pour la conception d'algorithmes FDD (Fault Detection and Diagnosis), mais est utilisé pour générer des données. Des données simulées sont utilisées à la place des données de vol pour isoler les effets probables du contrôleur sur le diagnostic, ce qui peut compliquer une étude préliminaire sur les FDD pour les drones. Les résultats montrent que pour les mesures simulées, SVM donne des résultats très précis sur la classification des défauts de perte d'efficacité sur les surfaces de contrôle. Ces résultats prometteurs appellent un complément d'investigation afin d'évaluer les performances du SVM en matière de classification des anomalies avec les données de vol. Des vols réels ont été organisés pour générer des données de vol erronées en manipulant le pilote automatique open source, Paparazzi. Toutes les données et le code sont disponibles dans le système de partage de code et de versions, Github. La formation est interrompue en raison du besoin de données étiquetées et du fardeau informatique lié à la phase de réglage des classificateurs. Les résultats montrent que, d'après les données de vol, SVM donne un score F1 de 0,98 pour la classification des failles bloquées à la surface de contrôle. En ce qui concerne les défauts de perte d'efficacité, il est nécessaire de recourir à certaines techniques d'ingénierie, impliquant l'ajout de mesures antérieures, pour obtenir les mêmes performances de classification. Un résultat prometteur est découvert lorsque les spinors sont utilisés comme caractéristiques au lieu de vitesses angulaires. Les résultats montrent qu'en utilisant les spinors pour la classification, la précision de la classification est considérablement améliorée, en particulier lorsque les classificateurs ne sont pas accordés. À l'aide de spinors et d'un noyau Gaussian, un classifieur sans accord donne un score F1 de 0,9555, soit 0,2712 lorsque les mesures gyroscopiques ont été utilisées. En résumé, ce travail montre que SVM donne une performance satisfaisante pour la classification des défauts sur les gouvernes d'un drone à l'aide de données de vol.
Download or read book Innovate Bristol written by Sven Boermeester and published by . This book was released on 2019-12 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Innovate Bristol highlights and celebrates those companies and individuals that are actively working at building a better tomorrow for all. Innovation Ecosystems thrive through the involvement and support of companies and individuals from all industries, which is why the Innovate series not only focuses on the innovators but also those people whom the Innovation Ecosystem, would not be able to thrive without.
Download or read book Space Systems as Contributors to the NATO Defence Mission written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Mission Systems Panel. Symposium and published by . This book was released on 1997 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fault tolerant Control Systems written by Hassan Noura and published by Springer Science & Business Media. This book was released on 2009-07-30 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: The seriesAdvancesinIndustrialControl aims to report and encourage te- nologytransfer in controlengineering. The rapid development of controlte- nology has an impact on all areas of the control discipline. New theory, new controllers, actuators, sensors, new industrial processes, computer methods, new applications, new philosophies. . . , new challenges. Much of this devel- ment work resides in industrial reports, feasibility study papers, and the - ports of advanced collaborative projects. The series o?ers an opportunity for researchers to present an extended exposition of such new work in all aspects of industrial control for wider and rapid dissemination. Control system design and technology continues to develop in many d- ferent directions. One theme that the Advances in Industrial Control series is following is the application of nonlinear control design methods, and the series has some interesting new commissions in progress. However, another theme of interest is how to endow the industrial controller with the ability to overcome faults and process degradation. Fault detection and isolation is a broad ?eld with a research literature spanning several decades. This topic deals with three questions: • How is the presence of a fault detected? • What is the cause of the fault? • Where is it located? However, there has been less focus on the question of how to use the control system to accommodate and overcome the performance deterioration caused by the identi?ed sensor or actuator fault.
Download or read book The Use of Pilot Rating in the Evaluation of Aircraft Handling Qualities written by George E. Cooper and published by . This book was released on 1969 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radio Link Quality Estimation in Low Power Wireless Networks written by Nouha Baccour and published by Springer Science & Business Media. This book was released on 2013-07-18 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive survey on related work for radio link quality estimation, which covers the characteristics of low-power links, the fundamental concepts of link quality estimation in wireless sensor networks, a taxonomy of existing link quality estimators and their performance analysis. It then shows how link quality estimation can be used for designing protocols and mechanisms such as routing and hand-off. The final part is dedicated to radio interference estimation, generation and mitigation.
Download or read book Aircraft Handling Qualities written by MS. John Hodgkinson and published by Wiley-Blackwell. This book was released on 1999 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a readable introduction to handling qualities, the combination of pilot acceptability and piloted performance with stability and control. It adopts the analytical and qualitative standpoints needed for handling qualities analysis and design of fixed-wing aircraft. Although there are several texts on stability and control, until now none has provided insight into the piloting concerns that have affected the success of recent fly-by-wire aircraft developments.
Download or read book Robots Drones UAVs and UGVs for Operation and Maintenance written by Diego Galar and published by CRC Press. This book was released on 2020-05-07 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: Industrial assets (such as railway lines, roads, pipelines) are usually huge, span long distances, and can be divided into clusters or segments that provide different levels of functionality subject to different loads, degradations and environmental conditions, and their efficient management is necessary. The aim of the book is to give comprehensive understanding about the use of autonomous vehicles (context of robotics) for the utilization of inspection and maintenance activities in industrial asset management in different accessibility and hazard levels. The usability of deploying inspection vehicles in an autonomous manner is explained with the emphasis on integrating the total process. Key Features Aims for solutions for maintenance and inspection problems provided by robotics, drones, unmanned air vehicles and unmanned ground vehicles Discusses integration of autonomous vehicles for inspection and maintenance of industrial assets Covers the industrial approach to inspection needs and presents what is needed from the infrastructure end Presents the requirements for robot designers to design an autonomous inspection and maintenance system Includes practical case studies from industries
Download or read book Advances in Rotorcraft Technology written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Flight Vehicle Integration Panel. Symposium and published by . This book was released on 1997 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Querying Graphs written by Angela Bonifati and published by Springer Nature. This book was released on 2022-06-01 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Graph data modeling and querying arises in many practical application domains such as social and biological networks where the primary focus is on concepts and their relationships and the rich patterns in these complex webs of interconnectivity. In this book, we present a concise unified view on the basic challenges which arise over the complete life cycle of formulating and processing queries on graph databases. To that purpose, we present all major concepts relevant to this life cycle, formulated in terms of a common and unifying ground: the property graph data model—the pre-dominant data model adopted by modern graph database systems. We aim especially to give a coherent and in-depth perspective on current graph querying and an outlook for future developments. Our presentation is self-contained, covering the relevant topics from: graph data models, graph query languages and graph query specification, graph constraints, and graph query processing. We conclude by indicating major open research challenges towards the next generation of graph data management systems.
Download or read book 2021 Systems and Information Engineering Design Symposium SIEDS written by IEEE Staff and published by . This book was released on 2021-04-29 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: SIEDS is a student focused international forum for applied research, development, and design in Systems and Information Engineering The symposium is the leading showcase for undergraduate and masters graduate design projects or design oriented graduate theses Faculty, industry, and government project advisors are welcome coauthors
Download or read book Implementing the Nagoya Protocol written by Brendan Coolsaet and published by Hotei Publishing. This book was released on 2015-04-21 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: The adoption of the Nagoya Protocol on Access and Benefit-sharing to the Convention on Biological Diversity in 2010 is a major landmark for the global governance of genetic resources and traditional knowledge. The way in which it will be translated into practice will however depend on the concrete implementation in national country legislation across the world. Implementing the Nagoya Protocol compares existing ABS regimes in ten European countries, including one non-EU member and one EU candidate country, and critically explores several cross-cutting issues related to the implementation of the Nagoya Protocol in the EU. Gathering some of the most professional and widely acclaimed experts in ABS issues, this book takes a major step towards filling a gap in the vast body of literature on national and regional implementation of global commitments regarding ABS and traditional knowledge.
Download or read book Fault tolerant Flight Control and Guidance Systems written by Guillaume J. J. Ducard and published by Springer Science & Business Media. This book was released on 2009-05-14 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a complete overview of fault-tolerant flight control techniques. Discussion covers the necessary equations for the modeling of small UAVs, a complete system based on extended Kalman filters, and a nonlinear flight control and guidance system.
Download or read book Historical Dictionary of Iran written by John Henry Lorentz and published by Historical Dictionaries of Asia, Oceania, and the Middle East. This book was released on 2007 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides an overview of specific events, movements, people, political and social groups, places, trends, and chronology. Allows for considerable exploration of a number of historical and contemporary topics and issues. The modern period, defined as 1800-present, is covered extensively.
Download or read book Earth Surface Processes Landforms and Sediment Deposits written by John Bridge and published by Cambridge University Press. This book was released on 2008-05 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique, advanced textbook combining sedimentology and geomorphology in a comprehensive and integrated way.
Download or read book 2020 AIAA IEEE 39th Digital Avionics Systems Conference DASC written by IEEE Staff and published by . This book was released on 2020-10-11 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: To provide a forum for free discussions of new ideas, research, development and applications in order to stimulate and inspire pioneering work in the field of digital avionics and related areas To acquire high quality technical papers for publication in a DASC Proceedings and other appropriate publications such as the DATC Journal of Aircraft and IEEE Systems Magazine To provide a meeting that will further the progress of DATC and IEEE entities, including Societies, Technical Committees, and local Sections and thereby better serve the interests of all DATC and IEEE members and the community at large To provide an atmosphere that strengthens the interpersonal rapport of a large number of engineers and scientists interested in specialized and closely related fields To provide an exhibition of current hardware and software products, methods and tools To provide instruction in advances in digital avionics and to encourage and reward student academic participation
