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Dissertations / Theses on the topic 'UAV Models'

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Published: 4 June 2021
Last updated: 6 September 2023

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1

Spring, Ted. "Uncertainty comparison of Digital Elevation Models derived from different image file formats." Thesis, Högskolan i Gävle, Avdelningen för Industriell utveckling, IT och Samhällsbyggnad, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-17193.

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Unmanned Aerial Systems (UAS) have become increasingly popular recently for surveying and mapping because of their efficiency in acquiring remotely sensed data in a short amount of time and the low cost associated with them. They are used to generate digital elevation models (DEM) derived from aerial photography for various purposes such as the documentation of cultural heritage sites, archaeological surveying or earthwork volume calculations. This thesis investigates the possible effects different file formats may have on the quality of elevation models. In this thesis, an UAS survey was simu
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2

Li, Bo Lim Alvin S. "Multiple UAV simulation with multiresolution multistage models and decision support." Auburn, Ala., 2008. http://hdl.handle.net/10415/1547.

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3

Dermentzoudis, Marinos. "Establishment of models and data tracking for small UAV reliability." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Jun%5FDermentzoudis.pdf.

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Thesis (M.S. in Operations Research and M.S. in Systems Engineering)--Naval Postgraduate School, June 2004.<br>Thesis advisor(s): David Olwell. Includes bibliographical references (p. 217-224). Also available online.
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4

Beel, Joseph John. "Anti-UAV defense for ground forces and hypervelocity rocket lethality models." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/30603.

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Approved for public release; distribution is unlimited.<br>This thesis analyzes the threat that unmanned aerial vehicles (UAVs) pose to U.S. ground forces. The operational environment in which both lethal and non-lethal UAVs may be encountered by friendly surface forces is examined to determine the elements of UAV operation which may be exploited in defense against UAVs. Two probability models of the air defense endgame are developed to examine the potential lethality of hypervelocity rocket anti-UAV weapons. These models are used to determine the detonation distance which maximizes the probab
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Thomaz, Mariana Bardella. "UAV hyperspectral images corrected of illumination differences considering microtopography in correction models /." Presidente Prudente, 2020. http://hdl.handle.net/11449/192887.

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Orientador: Nilton Nobuhiro Imai<br>Resumo: O uso do UAV no sensoriamento remoto é uma área crescente de conhecimento e pressionou o desenvolvimento de câmeras multi e hiperespectrais leves, que poderiam ser usadas embarcadas em UAV. Como as informações espectrais dependem das condições de iluminação da cena, as imagens adquiridas por UAV exigem pesquisa para avaliar o processamento de imagens para melhor adaptar os conceitos já estabelecidos às imagens orbitais. Portanto, a correção radiométrica é de fundamental importância para a extração de dados de imagens com alta confiança, uma vez que s
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Aasen, Helge Verfasser], and Georg [Gutachter] [Bareth. "The acquisition of Hyperspectral Digital Surface Models of crops from UAV snapshot cameras / Helge Aasen ; Gutachter: Georg Bareth." Köln : Universitäts- und Stadtbibliothek Köln, 2016. http://d-nb.info/1115330632/34.

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Aasen, Helge [Verfasser], and Georg [Gutachter] Bareth. "The acquisition of Hyperspectral Digital Surface Models of crops from UAV snapshot cameras / Helge Aasen ; Gutachter: Georg Bareth." Köln : Universitäts- und Stadtbibliothek Köln, 2016. http://d-nb.info/1115330632/34.

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8

Freeman, Michael James. "The Integration of Iterative Convergent Photogrammetric Models and UAV View and Path Planning Algorithms into the Aerial Inspection Practices in Areas with Aerial Hazards." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8738.

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Small unmanned aerial vehicles (sUAV) can produce valuable data for inspections, topography, mapping, and 3D modeling of structures. Used by multiple industries, sUAV can help inspect and study geographic and structural sites. Typically, the sUAV and camera specifications require optimal conditions with known geography and fly pre-determined flight paths. However, if the environment changes, new undetectable aerial hazards may intersect new flight paths. This makes it difficult to construct autonomous flight path missions that are safe in post-hazard areas where the flight paths are based on p
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Oliveira, Cristiane Paschoali de. "Análise dos modelos para cálculo de níveis de segurança relacionados à operação de veículos aéreos não tripulados." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/3/3141/tde-03092009-152328/.

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Desde o início do século XX que há registros do uso de Veículos Aéreos Não Tripulados (VANTs) utilizados com finalidade militar. Mas esta não é a única forma que se pode utilizá-los, o ambiente civil também é próspero em possíveis utilizações deste tipo de aeronave. Faltam ainda estudos e comprovações de que a integração dos VANTs no espaço aéreo juntamente com a aviação tripulada convencional não vá trazer alterações nos níveis de segurança já estabelecidos. Juntam-se a este desafio alguns outros, tais como padronizações de normas, classificações e legislação que regulamente o vôo das aeronav
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Niemann, Rafaela Soares [UNESP]. "Comparação de métodos de filtragem e geração de modelos digitais de terreno a partir de imagens obtidas por veículo aéreo não-tripulado." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/152635.

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Submitted by Rafaela Soares Niemann (rafaelaniemann@gmail.com) on 2018-01-30T19:22:21Z No. of bitstreams: 1 dissertacao_rafaela_soares_niemann.pdf: 20839099 bytes, checksum: 3e520cbdddb994f623e86eb596a2eeae (MD5)<br>Approved for entry into archive by Ana Paula Santulo Custódio de Medeiros null (asantulo@rc.unesp.br) on 2018-01-31T11:10:28Z (GMT) No. of bitstreams: 1 niemann_rs_me_rcla.pdf: 19917697 bytes, checksum: f24581bad9ffd4cf3c683c92a81563b2 (MD5)<br>Made available in DSpace on 2018-01-31T11:10:28Z (GMT). No. of bitstreams: 1 niemann_rs_me_rcla.pdf: 19917697 bytes, checksum: f24581ba
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Silva, Cristiano Alves da. "Evaluation of the accuracy of orthomosaics and terrain digital models generated by the UAV and its application in calculating the volume of Cariri Stone piles." Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=14594.

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Departamento Nacional de ProduÃÃo Mineral<br>Nos Ãltimos anos foi exponencial o avanÃo tecnolÃgico dos denominados VeÃculos AÃreos NÃo Tripulados (VANT) Estes equipamentos sÃo capazes de gerar produtos de sensoriamento remoto de elevada acurÃcia com baixo custo operacional desempenhando atividades antes executadas exclusivamente por aeronaves tripuladas Neste contexto o Departamento Nacional de ProduÃÃo Mineral (DNPM) para maximizar suas aÃÃes de fiscalizaÃÃo e gestÃo da mineraÃÃo firmou parceria com a Universidade de BrasÃlia (UnB) para desenvolvimento de um VANT de pequenas dimensÃes capaz d
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Strupplová, Lucie. "Business plan (model lean canvas)." Master's thesis, Vysoká škola ekonomická v Praze, 2014. http://www.nusl.cz/ntk/nusl-261832.

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The well arranged and instructivee business plan is the basic part of every business project.. Currently is very often used the lean canvas model of the business plan. This model shows us very istructively all the factors influencing the project realisation. The dissertation is divided into the two basic parts. In the thoretical were compared the essential forms of the business plan with their differences. The practical part consists of creating the lean canvas model for the progressive company using the UAV and the MAIA application, monitoring the flight of the UAV. The economic data were ana
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KRAYANI, ALI. "Learning Self-Awareness Models for Physical Layer Security in Cognitive and AI-enabled Radios." Doctoral thesis, Università degli studi di Genova, 2022. http://hdl.handle.net/11567/1074612.

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Cognitive Radio (CR) is a paradigm shift in wireless communications to resolve the spectrum scarcity issue with the ability to self-organize, self-plan and self-regulate. On the other hand, wireless devices that can learn from their environment can also be taught things by malicious elements of their environment, and hence, malicious attacks are a great concern in the CR, especially for physical layer security. This thesis introduces a data-driven Self-Awareness (SA) module in CR that can support the system to establish secure networks against various attacks from malicious users. Such users c
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14

Marconato, Emerson Alberto. "Modelo de arquitetura em camadas para interconexão de sistemas em SANT." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-01022017-112311/.

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Modelos de arquitetura têm sido utilizados para permitir o desenvolvimento mais adequado e estruturado de sistemas, desde os mais simples até os mais complexos. A utilização desses modelos em sistemas embarcados, principalmente quando se trata de sistemas embarcados críticos, como é o caso de veículos aéreos não tripulados (VANT), visam a permitir conformidades de padrões, redução no tempo de produção, redução e facilidade no processo de manutenção e desenvolvimento. Sistemas embarcados críticos possuem requisitos específicos, tais como alta confiabilidade e resposta em tempo real, segurança e
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15

Ptáček, Ondřej. "Zpracování snímků pořízených pomocí UAV." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-227111.

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This diploma thesis deals with the processing and evaluation of the pictures taken by unmanned aerial vehicles - UAV. The introductory part is devoted to the definition, use, applications and types of UAV especially for photogrammetric purposes. Also the software equipment is described, including a description and examples of several types of possible outcomes. Further the measurements, computational works and process of elaboration in used software programs are described. Achieved outcomes of elaboration are also presented. In conclusion, the overall evaluation and assessment of the results o
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Persson, Linnea. "Autonomous and Cooperative Landings Using Model Predictive Control." Licentiate thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-246194.

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Cooperation is increasingly being applied in the control of interconnected multi-agent systems, and it introduces many benefits. In particular, cooperation can improve the efficiency of many types of missions, and adds flexibility and robustness against external disturbances or unknown obstacles. This thesis investigates cooperative maneuvers for aerial vehicles autonomously landing on moving platforms, and how to safely and robustly perform such landings on a real system subject to a variety of disturbances and physical and computational constraints. Two specific examples are considered: the
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17

Lesiário, Ana. "Parametric Studies on UAV Flying Qualities." Thesis, KTH, Reglerteknik, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-105898.

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When developing an aircraft, one of several important aspects is to predict and properly design the dynamic behaviour of the aircraft. This holds for manned aircraft as well as for UAVs. The optimal dynamic behaviour for an aircraft depends on the mission or purpose: for a certain use an aircraft should be agile, other may require a more stable one. In aeronautics, the properties that describe the aircraft ecacy with respect to some task are known as ying qualities, and our goal is to study their dependence on some design parameters. As a test model we use an existing UAV. After deriving its 6
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18

Papageorgiou, Evangelos C. "Development of a dynamic model for a UAV." Thesis, Monterey, California. Naval Postgraduate School, 1997. http://hdl.handle.net/10945/8256.

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Approved for public release; distribution in unlimited.<br>Moments of inertia were experimentally determined and the longitudinal and lateral/directional static and dynamic stability and control derivatives were estimated for a fixed wing Unmanned Air Vehicle (UAV). High fidelity, non-linear equations of motion were derived and tailored for use on the specific aircraft. Computer modeling of these resulting equations was employed both in Matlab/Simulink and in Matrix(sub x)/Systembuild. The resulting computer model was linearized at a specific flight condition, and the dynamics of the aircraft
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Palmberg, Sebastian, and Sara Westroth. "Model-based concept development of system in UAV." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-80907.

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There is a large number of design options to consider when designing aircraft vehicle systems for fighter aircraft, and there is a lack of tool support that provides an overview of these available design options. Various design options will bring consequences in terms of weight, performance, cost, etc. which is desired to be known in an early conceptual phase. Conventional methods, such as morphological matrix and design structure matrix, lack the ability to generate an overview and map complex systems. By studying model-based tools in form of ontologies and feature models in Protégé and Featu
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20

SAMMARTANO, GIULIA. "Suitability Of 3D Dense Models For Rapid Mapping Strategies On Cultural Heritage Documentation And Conservation. Validation of metric and non-metric information extraction from integrated solutions." Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2703098.

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This dissertation deals with the suitability of digital models for the 3D documentation of built heritage (BH), in terms of its resolution, measure and representation regarding the building’s morphology and state of conservation. Specifically, the research enquires into the 3D models’ consistency and validation, generated by new methodological developments of geomatics-integrated techniques for obtaining geospatial data, by means of rapid mapping solutions in 3D survey, generally with low-cost approaches, to obtain metric and non-metric definition of the historical structures. Starting from th
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Bacciaglia, Antonio. "Progetto preliminare di un UAV multi-modale." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/9354/.

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Studio, a livello preliminare, di un sistema a pilotaggio remoto che permetta la sorveglianza e il monitoraggio di zone aeree e marine ad alto rischio e in contemporanea di compiere una raccolta di dati che possa essere inviata in tempo reale ad un utente a terra. Negli ultimi anni si è sviluppato notevolmente il settore dei velivoli a pilotaggio remoto sia ad ala fissa sia ad ala rotante, per la videoripresa e la fotografia aerea a bassa quota, che è utilizzata in molti ambiti tra i quali la fotogrammetria, la geologia e l’archeologia, nonché per studi scientifici e per la sicurezza. Nel p
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Sadlier, Sean M., and Franklin R. Hubbard. "Model design for a battlegroup intranet using a UAV." Thesis, Monterey, California. Naval Postgraduate School, 2002. http://hdl.handle.net/10945/6051.

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Approved for public release, distribution is unlimited<br>In this thesis the groundwork for an unmanned aerial vehicle(UAV) supporting the communications architecture of a US Naval Battle Group is proposed. The Global Hawk UAV described in detail is used as an example of a viable system. A system using a UAV as a central node in a battle group intranet could enhance the communications within a battle group. The preliminary steps required to demonstrate this concept using a model based on the OPNET software program are defined. The model presented is the one we recommend modifying to research t
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Ye, Haoquan. "Control of Quadcopter UAV by Nonlinear Feedback." Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1523544168630815.

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Stovner, Bård Bakken. "Model Predictive Control in UAV Trajectory Planning and Gimbal Control." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for teknisk kybernetikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-25924.

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In order to keep a target on the ground in the camera frame of a camera mounted witha pan-tilt gimbal to an unmanned aerial vehicle, three controllers that utilize the modelpredictive control methodology are developed. Through the process of simulating andhardware-in-the-loop testing the controllers, it is shown that one of the controllers canachieve satisfying control of both camera and vehicle. A new controller is proposed forfuture research which is assumed to achieve better control based on the findings of thisthesis.
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Samani, Jakob. "UAS-noggrannhet i praktiken : En undersökning av dagens UAS-fotogrammetris noggrannhet." Thesis, Karlstads universitet, Institutionen för geografi, medier och kommunikation, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-31010.

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Sammanfattning Undersökningens syfte är att förstå hur noggrann UAS-fotogrammetrin i dagsläget (2013) är.  Frågeställningarna som undersökningen utgick ifrån var: kan UAS-fotogrammetri i dagsläget ge precisa punkter med hjälp av att mäta in centrum av 1x1 meter utlagda plattor som kan ses i ortofoto?;  Kan det ge snarlik noggrannhet med pixelstorleken? samt Kan UAS-tekniken idag användas för att producera pålitliga höjdmodeller? För att uppnå syftet har en undersökning utförts med jämförelse på koordinater insamlade med totalstation och insamlade med UAS-fotogrammetriska metoder. Resultatet vi
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FNU, Vijaykumar Sureshkumar. "Autonomous Control of A Quadrotor UAV Using Fuzzy Logic." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1428049378.

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Zhao, Hui Wen, and zhwtkd@hotmail com. "Development of a dynamic model of a ducted fan VTOL UAV." RMIT University. Aerospace, Mechanical & Manufacturing Engineering, 2010. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20100210.142423.

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The technology of UAV (Unmanned Aerial Vehicle) has developed since its conception many years ago. UAVs have several features such as, computerised and autonomous control without the need for an on-board pilot. Therefore, there is no risk of loss of life and they are easier to maintain than manned aircraft. In addition, UAVs have an extended range/endurance capability, sometimes for several days. This makes UAVs attractive for missions that are typically
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KASAM, SUMAN. "FORMAL VERIFICATION OF TIME CONSTRAINED UAV TASK ALLOCATION USING MODEL-CHECKING." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1201537607.

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Gupta, Gaurang. "Transition of Quadcopter Box-wing UAV between Cruise and VTOL Modes." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin153538165533359.

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Kašiár, Dominik. "Možnosti uplatnění UAV a podobných zařízení ve stavebnictví." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409889.

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The diploma thesis deals with the creation of a 3D model using laser scanning by unmanned aircraft (UAV). In the first part the author describes the history, legislation, the possibility of using unmanned aircraft and their dividing. The next section describes the process of creating a 3D model from data collection, using a drone to the actual modeling in Revit and subsequent use of the 3D model.
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Barauskas, Vaidas. "UAB „Marškinėlis“ paslaugų kokybės gerinimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130605_112325-10645.

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Baigiamojo magistro darbo tikslas suformuluotas taip: nustačius veiksmus, lemiančius UAB „Marškinėlis“ paslaugų kokybę, pateikti jos gerinimo sprendimus. Teorinėje šio darbo dalyje yra analizuojama paslaugų kokybės samprata, praktinė reikšmė bei jos vertinimo modeliai, svarba ir galimybės; pateikiamos vadybos autorių siūlomos paslaugų kokybės gerinimo perspektyvos. Analitinėje baigiamojo darbo dalyje analizuojama reklamos paslaugas teikianti įmonė UAB „Marškinėlis“ ir pateikiami tyrimo rezultatai, atlikto dviem etapais: interviu su UAB „Marškinėlis“ įmonės direktore ir anketiniu empiriniu tyri
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Meyer, Danielle L. "Energy Optimization of a Hybrid Unmanned Aerial Vehicle (UAV)." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1523493111005807.

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Andersson, Michael. "Fault diagnosis of a Fixed Wing UAV Using Hardware and Analytical Redundancy." Thesis, Linköpings universitet, Fordonssystem, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-94139.

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In unmanned aerial systems an autopilot controls the vehicle without human interference. Modern autopilots use an inertial navigation system, GPS, magnetometers and barometers to estimate the orientation, position, and velocity of the aircraft. In order to make correct decisions the autopilot must rely on correct information from the sensors. Fault diagnosis can be used to detect possible faults in the technical system when they occur. One way to perform fault diagnosis is model based diagnosis, where observations of the system are compared with a mathematical model of the system. Model based
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Grimstad, Benjamin. "Fotogrammetrisk 3D-modellering av en kraftledningsstolpe med UAV : Undersökning av modellernas geometriska kvalitet." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-72912.

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The overall objective of the study was to investigate how much a photogrammetrically modelled power line pole differs from reality and test what flight height gives the best result. In the study, two 3D models were created using UAV images supported by RTK-measured ground points. In both models, vertical images from a height of 40 meters were used. The first model was supplemented with oblique images taken from a height of 40 meters and the second model with oblique images taken from a height of 30 meters. In order to compare both models with the actual power line pole, a total of 25 details o
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Sköld, Olivia. "Analys av lägesosäkerheter hos fotogrammetriskt framställda DTM - en jämförelse mellan två programvaror." Thesis, Högskolan i Gävle, Samhällsbyggnad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-32058.

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Idag blir användningen av drönare allt mer vanlig för dokumentation av markytor. Det är ett billigare alternativ för att dokumentera små och otillgängliga områden. Genom tekniken går det bland annat att framställa olika digitala modeller som representerar jordens yta. En sådan modell kan vara en terrängmodell (DTM) som är en modell av markytan exklusive vegetation, hus eller annat som befinner sig på marken. Modeller kan framställas genom flygdata såsom laserskannad (LiDAR-data) eller flygfotograferade data (flygbilder). För att framställa en digital modell från rådata används olika programvar
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Dejan, Vasić. "Model geodetskog premera savremenim akvizicionim tehnologijama." Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2018. https://www.cris.uns.ac.rs/record.jsf?recordId=106256&source=NDLTD&language=en.

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Prikupljanje prostornih podataka se danas, u projektima premera i obnovepremera, različitim projektima iz oblasti inženjerske geodezije, realizujekonvencionalnim metodama, koje najče&scaron;će obezbeđuju traženu tačnostizlaznih podataka. Sa druge strane, razvojem novih tehnologija i uređaja zaprikupljanje podataka nameću se i nove metode rada koje obezbeđujuneuporedivo veći nivo detaljnosti od konvencionalnih metoda pa veomačesto imaju prednost u odnosu na konvencionalne metode naročito uprojektima inženjerske geodezije. U disertaciji je dat predlog modelageodetskog premera savremenim akvizici
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Skjong, Espen, and Stian Aas Nundal. "Tracking objects with fixed-wing UAV using model predictive control and machine vision." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for teknisk kybernetikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-25990.

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This thesis describes the development of an object tracking system for unmanned aerial vehicles (UAVs), intended to be used for search and rescue (SAR) missions. The UAV is equipped with a two-axis gimbal system, which houses an infrared (IR) camera used to detect and track objects of interest, and a lower level autopilot. An external computer vision (CV) module is assumed implemented and connected to the object tracking system, providing object positions and velocities to the control system. The realization of the object tracking system includes the design and assembly of the UAV&#146;s paylo
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Unger, Jakob [Verfasser]. "Integrated estimation of UAV image orientation with a generalised building model / Jakob Unger." Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2020. http://d-nb.info/122126950X/34.

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Unger, Jakob Daniel [Verfasser]. "Integrated estimation of UAV image orientation with a generalised building model / Jakob Unger." Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2020. http://nbn-resolving.de/urn:nbn:de:101:1-2020111201081717741034.

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40

Estima, Maria Inês Duarte Ramos. "Comparação de modelos tridimensionais produzidos com imagens adquiridas por UAV e avaliação de volumes." Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/16919.

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Mestrado em Geoinformática<br>Na área da geoengenharia, um dos grandes obstáculos sempre foram os custos associados às operações inerentes à realização de trabalhos nos diferentes tipos de serviços e produtos que se podem elaborar nesta tão vasta área. É importante salientar como grande benefício a utilização de novas ou mais recentes tecnologias que minimizem estes custos, e tenham como resultados iguais ou melhores produtos e serviços, comparativamente com os realizados recorrendo a métodos e tecnologias tradicionais. Contudo, e como resultado destas necessidades, foram surgindo nos último
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41

Simmons, Benjamin Mason. "System Identification of a Nonlinear Flight Dynamics Model for a Small, Fixed-Wing UAV." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/95324.

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This thesis describes the development of a nonlinear flight dynamics model for a small, fixed-wing unmanned aerial vehicle (UAV). Models developed for UAVs can be used for many applications including risk analysis, controls system design and flight simulators. Several challenges exist for system identification of small, low-cost aircraft including an increased sensitivity to atmospheric disturbances and decreased data quality from a cost-appropriate instrumentation system. These challenges result in difficulties in development of the model structure and parameter estimation. The small size may
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Carraro, Alberto <1995&gt. "Application of different types of Kalman Filter to approximate state of an UAV Model." Master's Degree Thesis, Università Ca' Foscari Venezia, 2022. http://hdl.handle.net/10579/20977.

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The invention of Kalman filter brings to the engineer world an important solution on the noise management, and more in general, the possibility of smoothing perturbed data collected from a sensor. So far, studies and upgrades adopted in this environment helped researchers to develop different kind of filters, adopting different methods and mathematical tools which allowed to handle different kinds of data and perform better. The aim of this thesis is study the most used Kalman filters, and in particular the combination of them with algebraic structures such as Dual Quaternions, in order to est
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43

Boček, Michal. "Rozšíření řídicího systému modelu letadla Skydog o podporu vzdáleného a samočinného řízení Android aplikací." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2014. http://www.nusl.cz/ntk/nusl-236091.

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The thesis aims to design and implement an Android application with ability to control the autopilot of the Skydog aircraft model using the wireless telemetry. The application shall receive data from an aircraft model gathered from various installed sensors. These data shall be then processed and corresponding instructions for autopilot shall be sent back. When collision with terrain or obstacle is detected, the application shall send instructions to autopilot to avoid such collision. RRT algorithm is used to find collision-free flight trajectory. Database of known obstacles and digital terrai
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44

Pires, Rayner de Melo. "Desenvolvimento de um mecanismo plug-and-play para o arranjo inteligente de sensores em sistemas aéreos não tripulados." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-07052014-162205/.

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O uso de aeronaves não tripuladas (VANTs) tem crescido substancialmente nos últimos anos, tanto no campo militar quanto no civil. Roadmaps preveem que em um futuro próximo essas aeronaves compartilhem o espaço aéreo com aeronaves convencionais, exigindo novas arquiteturas de sistemas embarcados que possam garantir uma operação coordenada e segura desses robôs. A maior parte das suas missões baseia-se fortemente em um conjunto de sensores transportados pela aeronave como parte da payload da missão. Contudo, não é trivial a integração de diferentes missões em diferentes aeronaves, visto que aind
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45

Al, Younes Younes. "Model-free approach for control, fault diagnosis, and fault-tolerant control : with application to a quadrotor UAV." Thesis, Amiens, 2016. http://www.theses.fr/2016AMIE0028/document.

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Les principaux travaux développés dans cette thèse traitent de la commande, du diagnostic et de la tolérance aux fautes utilisant le concept de la commande sans modèle récemment proposé dans la littérature. Les méthodes développées sont testées en temps réel et validées sur un quadrotor. Dans un premier temps, le modèle du quadrotor est présenté et analysé dans l'objectif de concevoir et implanter une loi de commande robuste aux perturbations et aux incertitudes de modèle. Pour cela, le concept de commande sans modèle est utilisé. Ce concept est basé sur la détermination d'une loi de commande
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46

Fruet, Andrea Costa. "Avaliação do efeito fotoprotetor de compostos fenólicos sobre culturas de células da pele irradiadas por UVA e UVB." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/9/9138/tde-28052015-083539/.

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A exposição excessiva à radiação Ultravioleta (UV) resulta em manifestações clínicas à pele humana como queimaduras, fotoenvelhecimento e câncer. A radiação UVA, preferencialmente, induz à formação de espécies reativas de oxigênio, enquanto que a radiação UVB é absorvida diretamente pelo DNA. Apesar de mecanismos endógenos auxiliarem na prevenção/reparação dos danos causados pela radiação UV, quando o dano excede a capacidade de reparação celular, diversos efeitos lesivos ocorrem na pele como alterações da matriz dérmica, resposta inflamatória e desidratação do estrato córneo. O uso de compost
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47

Brendlinger, Jack W. "Development of Guidance Laws for a Reduced Order Dynamic Aircraft Model." Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1516106170428761.

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48

Silva, Tiago José Jesus da. "Desempenho exportador da manga e da uva brasileira no comércio internacional: uma análise entre o período de 2003 a 2013." Universidade Federal de Pernambuco, 2015. https://repositorio.ufpe.br/handle/123456789/16065.

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Submitted by Fabio Sobreira Campos da Costa (fabio.sobreira@ufpe.br) on 2016-03-18T12:43:57Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertação Tiago versão Final.pdf: 1172045 bytes, checksum: 577e2c2a2e0df6a5a67f3715fd4ff5dd (MD5)<br>Made available in DSpace on 2016-03-18T12:43:57Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertação Tiago versão Final.pdf: 1172045 bytes, checksum: 577e2c2a2e0df6a5a67f3715fd4ff5dd (MD5) Previous issue date: 2015-02-09<br>O presente trabalho t
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49

Cafaggi, Sara. "Ricostruzione della morfologia mediante processo fotogrammetrico da volo a bassa quota con low cost UAV." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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L'obiettivo di questo lavoro è stato quello di confrontare il movimento del sedimento costituente la duna a sud di Foce Bevano nell’arco di tre mesi invernali; realizzato tramite la ricostruzione tridimensionale della superficie da fotogrammetria aerea a bassa quota. Sono stati effettuati due rilievi fotografici (Ottobre e Dicembre, 2017) tramite UAV (Unmanned aerial vehicle) e questi sono stati confrontati con un simultaneo rilievo tramite TLS (Terrestrial Laser Scanner), si sono discussi i risultati del rilievo tramite UAV mettendo a confronto le ricostruzione dei DEM che sono stati restitui
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50

Carter, Grant Inman. "Adaptive Control of the Transition from Vertical to Horizontal Flight Regime of a Quad-Tailsitter UAV." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/103385.

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Tailsitter UAVs (Unmanned Aerial Vehicles) are a type of VTOL (Vertical Take off and Landing) aircraft that combines the agility of a quadrotor drone with the endurance and speed of a fixed-wing aircraft. For this reason, they have become popular in a wide range of applications from tactical surveillance to parcel delivery. This thesis details a clean sheet design process for a tailsitter UAV that includes the dynamic modeling, control design, simulation, vehicle design, vehicle prototype fabrication, and testing of a tailsitter UAV. The goal of this process was to design a robust controller t
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