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Dissertations / Theses on the topic 'Long endurance'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

Brizon, Mathilde. "Solar Energy Generation Model for High Altitude Long Endurance Platforms." Thesis, KTH, Flygdynamik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-180278.

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For designing and evaluating new concepts for HALE platforms, the energy provided by solar cells is a key factor. The purpose of this thesis is to model the electrical power which can be harnessed by such a platform along any ﬂight trajectory for diﬀerent aircraft designs. At ﬁrst, a model of the solar irradiance received at high altitude will be performed using the solar irradiance models already existing for ground level applications as a basis. A calculation of the eﬃciency of the energy generation will be performed taking into account each solar panel’s position as well as shadows casted b

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2

Chang, J. M. "A flexible, subsonic high altitude long endurance UVA conceptual design methodology." Thesis, Cranfield University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245445.

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3

Wu, Xiaonan. "Design and Development of Variable Pitch Quadcopter for Long Endurance Flight." Thesis, Oklahoma State University, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10813154.

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<p> The variable pitch quadrotor is not a new concept but has been largely ignored in small unmanned aircraft, unlike the fixed pitch quadcopter which is controlled only by changing the RPM of the motors and only has about 30 minutes of total flight time. The variable pitch quadrotor can be controlled either by the change of the motor RPM or rotor blade pitch angle or by the combination of both. This gives the variable pitch quadrotor potential advantages in payload, maneuverability and long endurance flight. This research is focused on the design methodology for a variable pitch quadrotor usi

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VanderMey, Josiah T. "A tilt rotor UAV for long endurance operations in remote environments." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/67196.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 153-157).<br>Extended mission times will greatly expand the utility of small UAVs that are currently limited to a single flight lasting no more than a few hours. This thesis assesses the challenges to developing a small, long endurance UAV and presents a preliminary vehicle and controller design for a tiltrotor UAV that achieves long endurance operation by combining autonomous takeoff and landing capabilities with

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Carvalho, Isa Diana de Sousa Baptista Morais. "Low reynolds propellers for increased quadcopters endurance." Master's thesis, Universidade da Beira Interior, 2013. http://hdl.handle.net/10400.6/1977.

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With this MSit c. Dissertation in Aeronautical Engineering is intended to contribute to the research and development of long endurance quadcopters. In this dissertation, initially, the topic study is introduced and the principals components (propeller, motor and battery) for greater autonomy quadcopters are described along with the advances made by the aeronautical sector in this strand and the possible applications. Posteriorly, a description of the program used for the analysis of existing propellers and new designs is given, and its validation is performed with the experimental data set of

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Burton, Michael S. M. (Michael J. ). Massachusetts Institute of Technology. "Solar-electric and gas powered, long-endurance UAV sizing via geometric programming." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/112414.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 83-85).<br>Fueled by telecommunication needs and opportunities, there has been a recent push to develop aircraft that can provide long-endurance (days to weeks) persistent aerial coverage. These aircraft present a complicated systems engineering problem because of the multifaceted interaction between aerodynamics, structures, environmental effects, and engine, battery, and other component performance. Using

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Agte, Jeremy S. (Jeremy Sundermeyer). "Multistate analysis and design : case studies in aerospace design and long endurance systems." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/68167.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, September 2011.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>"September 2011." Cataloged from student submitted PDF version of thesis.<br>Includes bibliographical references (p. 221-230).<br>This research contributes to the field of aerospace engineering by proposing and demonstrating an integrated process for the early-stage, multistate design of aerospace systems. The process takes into early

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8

Symolon, William Everette Major. "High-altitude, long-endurance UAVs vs. satellites : potential benefits for U.S. Army applications." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/54620.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2009.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 145-159).<br>Satellites have become a critical component of nearly every aspect of modern life. In addition to well-known civilian applications, military applications of space-based platforms include supporting mission operations through communications; intelligence, surveillance and reconnaissance (ISR); and position, navigation and timing (PN&T). While satellite applications are numerous and increasing technical

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9

Ajaj, Rafic Mohammad. "Design, modelling and optimisation of morphing structures for medium altitude long endurance UAVs." Thesis, Swansea University, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.678283.

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10

Krouse, Rhonna Zena. "A descriptive study examining motivation, goal orientations, coaching, and training habits of women ultrarunners." [Boise, Idaho] : Boise State University, 2009. http://scholarworks.boisestate.edu/td/51/.

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11

Altman, Aaron. "A conceptual design methodology for low speed high altitude long endurance unmanned aerial vehicles." Thesis, Cranfield University, 2000. http://hdl.handle.net/1826/3998.

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A conceptual design methodology was produced and subsequently coded into a Visual C++ (GUI) environment to facilitate the rapid comparison of several possible configurations to satisfy High Altitude Long Endurance (FIALE) unmanned aircraft (UAV) missions in the Low Speed (propeller driven aircraft) regime. Several comparative studies were performed to verify the applicability of traditional design methods. The traditional computational design methodologies fail in several areas such as high aspect ratio wing weight estimation and design, low Reynolds number wing design, high altitude engine pe

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12

Alsahlani, A. "Design of a swept-wing High-Altitude Long-Endurance Unmanned Air Vehicle (HALE UAV)." Thesis, University of Salford, 2017. http://usir.salford.ac.uk/44290/.

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High-altitude aircraft flying in the stratosphere (around 17-30 km altitude) can provide a useful platform for sensors to support a range of military and civilian surveillance tasks. The main topic of the thesis concerns the analysis of solar powered unmanned aerial vehicles designed for extended flight operations at high altitudes. An aft-swept flying wing configuration has been adopted for high altitude applications. Specific topics that were considered focussed on the development of a conceptual design tool and a multi-disciplinary optimisation tool able to converge on the layout for a sola

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Baranauskas, Marissa Nicole. "Long Term Carbohydrate Intake and the Effect on Endurance Performance in Collegiate Distance Runners." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1461763324.

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14

Cook, Robert Graham. "Robust control of high altitude long endurance unmanned aerial vehicles using novel lift effectors." Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/9998.

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High-Altitude Long-Endurance Unmanned Aerial Vehicles (HALE UAVs) have been the focus for many researchers in the past decades, and are becoming more and more attainable as technology is improving. Recent interest into solar-powered HALE UAVs is leading the way to achieving flight-times which are not limited by a requirement for refuelling, and could continue for months at a time. Such aircraft have huge potential in providing reconnaissance or communications services, and could potentially take on the usual roles of satellites as a much cheaper alternative. One area of HALE UAV design which r

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15

Camacho, Nahum. "Improving operational effectiveness of Tactical Long Endurance Unmanned Aerial Systems (TALEUAS) by utilizing solar power." Thesis, Monterey, California: Naval Postgraduate School, 2014. http://hdl.handle.net/10945/42593.

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Approved for public release; distribution is unlimited<br>This thesis develops, implements, and validates a hybrid energy-harvesting technique that enables extracting energy from the environment by utilizing convective thermals as a source of potential energy, and exploiting solar radiation for photovoltaic (PV) energy to achieve long endurance flight of an autonomous glider. The dynamic behavior of convective thermals, as well as their mathematical models, are studied to determine their motion, while the navigation task is simultaneously solved using a Bayesian search approach that is based o

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Sivaji, Rangarajan. "Aerodynamic analysis of the joiined-wing configuration of a high-altitude, long-endurance (hale) aircraft." Cincinnati, Ohio : University of Cincinnati, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=ucin1083849791.

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17

Gates, Nathaniel Spencer. "Combined Trajectory, Propulsion and Battery Mass Optimization for Solar-Regenerative High-Altitude Long-Endurance Aircraft." BYU ScholarsArchive, 2021. https://scholarsarchive.byu.edu/etd/8980.

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This thesis presents the work of two significant projects. In the first project, a suite of benchmark problems for grid energy management are presented which demonstrate several issues characteristic to the dynamic optimization of these systems. These benchmark problems include load following, cogeneration, tri-generation, and energy storage, and each one assumes perfect foresight of the entire time horizon. The Gekko Python package for dynamic optimization is introduced and two different solution methods are discussed and applied to solving these benchmarks. The simultaneous solve mode out-pe

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18

SIVAJI, RANGARAJAN. "AERODYNAMIC ANALYSIS OF THE JOINED-WING CONFIGURATION OF A HIGH-ALTITUDE, LONG ENDURANCE (HALE) AIRCRAFT." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1083849791.

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19

Ferguson, Charles R. Harbold Douglas A. "High Altitude Long Endurance (HALE) platforms for tactical wireless communications and sensor use in military operations /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.mil/100.2/ADA397280.

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Thesis (M.S. in Space Systems Operations)--Naval Postgraduate School, Sept. 2001.<br>Thesis advisors: Racoosin, Charles M. ; Jones, Carl R. "September 2001." Includes bibliographical references (p. 116-118). Also Available online.

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Harbold, Douglas A. "High Altitude Long Endurance (HALE) platforms for tactical wireless communications and sensor use in military operations." Thesis, Monterey, California. Naval Postgraduate School, 2001. http://hdl.handle.net/10945/1694.

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ce-based systems along with their shortfalls, and defines support capabilities from the stratospheric environment. It then provides an in-depth review of emerging high altitude long endurance (HALE) platforms, analyzes HALE platforms survivability, provides a concept of operations (CONOPS) for HALE employment, and performs a HALE platform comparative analysis.<br>US Navy (USN) author

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21

Recoskie, Steven. "Autonomous Hybrid Powered Long Ranged Airship for Surveillance and Guidance." Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31711.

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With devastating natural disasters on the rise, technological improvements are needed in the field of search and rescue (SAR). Unmanned aerial vehicles (UAVs) would be ideal for the search function such that manned vehicles can be prioritized to distributing first-aid and ultimately saving lives. One of the major reasons that UAVs are under utilized in SAR is that they lack a long flight endurance which compromises their effectiveness. Dirigibles are well suited for SAR missions since they can hover and maintain lift without consuming energy and can be easily deflated for packaging and transpo

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22

Kaloyanova, Valentina B. "Structural Modeling and Optimization of a Joined-Wing Configuration of a High-Altitude Long-Endurance (HALE) Aircraft." University of Cincinnati / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1259075776.

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23

Sood, Deepti. "Predicting Shoulder Fatigue for Long Durations Using Psychophysical Measures Obtained from Short Trials." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/33219.

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Localized muscular loads have in many cases replaced whole body loads in the current mechanized industry. In highly automated automobile industries, the prevalence of upper extremity musculoskeletal disorders is a matter of continuing concern. Overhead work has especially been noted for its association with shoulder related musculoskeletal disorders. Research aimed at determining causal relationships between overhead work and risk of injury has increasingly used localized muscle fatigue as an indirect or surrogate measure. In this study, localized muscle fatigue was used as a primary measu

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24

Young, Jeremy Chi-Ying. "Cognitive and brain structural effects of long-term high-effort endurance exercise in older adults : are there measurable benefits?" Thesis, University of Sussex, 2014. http://sro.sussex.ac.uk/id/eprint/51605/.

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Age-related decline in cognitive performance and brain structure can be offset by increased exercise. Little is known, however, about the cognitive and brain structural consequences of long-term high-effort endurance exercise. In a cross-sectional design, we recruited older adults who had been engaging in high-effort endurance exercise over at least twenty years, and compared their cognitive performance and brain structure with a non-sedentary control group similar in age, sex, education, IQ, depression levels, and other lifestyle factors. We hypothesized that long-term high-effort endurance e

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Restrepo-Velez, Ana M. "Long-Term Performance of Asphalt Concrete Perpetual Pavement WAY-30 Project." Ohio University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1307042192.

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26

Hedman, Kristofer. "Cardiac function and long-term volume load : Physiological investigations in endurance athletes and in patients operated on for aortic regurgitation." Doctoral thesis, Linköpings universitet, Avdelningen för kardiovaskulär medicin, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-123316.

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Background and aims. The heart is a remarkably adaptable organ, continuously changing its output to match metabolic demands and haemodynamic load. But also in long-term settings, such as in chronic or repeated volume load, there are changes in cardiac dimensions and mass termed cardiac hypertrophy. Depending on the stimulus imposing the volume load this hypertrophy differs in extent and phenotype. We aimed to study cardiac function in two settings with long-term volume load, including patients previously operated for aortic regurgitation and healthy females performing endurance training. Metho

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MARISARLA, SOUJANYA. "STRUCTURAL ANALYSIS OF AN EQUIVALENT BOX-WING REPRESENTATION OF SENSORCRAFT JOINED-WING CONFIGURATION FOR HIGH-ALTITUDE, LONG-ENDURANCE (HALE) AIRCRAFT." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1116215297.

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28

Whitfield, Clifford A. "An adaptive dual-optimal path-planning technique for unmanned air vehicles with application to solar-regenerative high altitude long endurance flight." Columbus, Ohio : Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1242940056.

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29

Östlund-Lagerström, Lina. "Effect of long-term ultra-endurance training on telomere length and telomere regulatory protein expressions in vastus lateralis of healthy humans." Thesis, Örebro universitet, Hälsoakademin, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-15859.

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30

Welman, Karen Estelle. "The value of graduated compression socks as a post-exercise recovery modality in long distance runners." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6611.

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31

Smith, Nathan, Charles D. Kilpatrick, Jon C. Mauerhan та ін. "Endurance of SN 2005ip after a decade: X-rays, radio and Hα like SN 1988Z require long-lived pre-supernova mass-loss". OXFORD UNIV PRESS, 2017. http://hdl.handle.net/10150/623937.

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Supernova (SN) 2005ip was a Type IIn event notable for its sustained strong interaction with circumstellar material (CSM), coronal emission lines and infrared (IR) excess, interpreted as shock interaction with the very dense and clumpy wind of an extreme red supergiant. We present a series of late- time spectra of SN 2005ip and a first radio detection of this SN, plus late-time X-rays, all of which indicate that its CSM interaction is still strong a decade post- explosion. We also present and discuss new spectra of geriatric SNe with continued CSM interaction: SN 1988Z, SN 1993J and SN 1998S.

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Welstead, Jason Crouse Gilbert L. "Stability analysis of a segmented free-wing concept for UAS gust alleviation in adverse environments." Auburn, Ala, 2009. http://hdl.handle.net/10415/1847.

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NARAYANAN, VIJAY. "STRUCTURAL ANALYSIS OF REINFORCED SHELL WING MODEL FOR JOINED-WING CONFIGURATION." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1116214221.

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34

Kacala, Jeffrey C., and Corey M. Collier. "A cost-effectiveness analysis of tactical satellites, high-altitude long-endurance airships, and high and medium altitude unmanned aerial systems for ISR and communication missions." Thesis, Monterey, California. Naval Postgraduate School, 2008. http://hdl.handle.net/10945/3934.

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Before 1991, the United States military's demand for additional communications bandwidth and timely intelligence was rising rapidly. Since then, with the advent of the Global War on Terrorism, it has increased substantially. To address this growing need, the Department of Defense has focused its acquisition and procurement efforts on obtaining new communications and intelligence, surveillance, and reconnaissance (ISR) platforms that can help lessen shortfalls and possibly exploit new, untapped resources. Recently, there has been an increasing focus on new technology, such as tactical sate

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Collier, Corey M. Kacala Jeffrey C. "A cost-effectiveness analysis of tactical satellites, high-altitude long-endurance airships, and high and medium altitude unmanned aerial systems for ISR and communication missions." Monterey, Calif. : Naval Postgraduate School, 2008. http://edocs.nps.edu/npspubs/scholarly/theses/2008/Sept/08Sep%5FCollier.pdf.

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Thesis (M.S. in Space Systems Operations)--Naval Postgraduate School, September 2008.<br>Thesis Advisor(s): Welch, William J. "September 2008." Description based on title screen as viewed on November 5, 2008. Includes bibliographical references (p. ). Also available in print.

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36

Wack, Stephanie. "Using a Goal-Setting and Feedback Procedure to Increase Running Distance." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4247.

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Goal-setting procedures have been employed in many different sports, and have been shown to be a beneficial component for enhancing sports performance. For this study, a changing-criterion within multiple-baseline design was used to evaluate a multi-component intervention for increasing running distance for five healthy adults. The intervention consisted of goal setting with performance feedback. Participants set a short-term goal each week and a long-term goal to achieve upon completion of the study. The study incorporated the use of the NikeTM + SportKit for automated recording of the distan

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Köthe, Alexander [Verfasser], Manfred [Akademischer Betreuer] Zehn, Robert [Gutachter] Luckner, Carlos E. S. [Gutachter] Cesnik, and Wolf-Reiner [Gutachter] Krüger. "Flight mechanics and flight control for a multibody aircraft : Long-endurance operation at high altitudes / Alexander Köthe ; Gutachter: Robert Luckner, Carlos E. S. Cesnik, Wolf-Reiner Krüger ; Betreuer: Manfred Zehn." Berlin : Universitätsverlag der TU Berlin, 2019. http://d-nb.info/1189727722/34.

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38

Malgoyre, Alexandra. "Déterminants mitochondriaux de l'oxydation des acides gras : modulation par l'entraînement, l'hypoxie et un agoniste PPAR-δ". Thesis, Grenoble, 2011. http://www.theses.fr/2011GRENV013/document.

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La plasticité mitochondriale à l'égard de l'oxydation de substrats, et sa participation à la transition métabolique ont été étudiées dans deux conditions: l'exposition chronique à l'hypoxie et l'entraînement en endurance, connues comme modulatrices de la préférence de substrats. Ainsi l'affinité pour le palmitoyl carnitine est augmentée par l'hypoxie et la restriction calorique alors qu'au contraire le flux maximal de palmitoyl CoA (PCoA) semble freiné par l'hypoxie. Quant aux effets de l'entraînement, malgré une amélioration du temps limite de course à intensité sous-maximale et une augmentat

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Wilson, Mathew. "Athletes' heart and exercise related sudden cardiac death : across the age span." Thesis, University of Wolverhampton, 2010. http://hdl.handle.net/2436/122548.

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Background - Regular exercise reduces the risk of cardiovascular disease and subsequent sudden cardiac death (SCD). However, a small, but notable proportion of athletes die suddenly due to inherited or congenital disorders of the heart that predispose to malignant ventricular arrhythmias. Such tragedies are highly publicised, particularly when high-profile athletes are involved. To date, limited evidence for the efficacy of cardiovascular pre-participation screening exists outside of the Italian experience. Furthermore, limited data exists examining the impact of ethnicity on cardiac adaptatio

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Monteiro, Juliana Castro. "Efeitos da infusão de Heteropterys aphrodisiaca (O.Mach) associada ao treinamento fisico no sistema musculoesqueletico de ratos Wistar." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/317839.

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Orientador: Mary Anne Heidi Dolder<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia<br>Made available in DSpace on 2018-08-15T21:18:52Z (GMT). No. of bitstreams: 1 Monteiro_JulianaCastro_D.pdf: 3195959 bytes, checksum: df90aa1ceb6206d4b8d1a040083df0c7 (MD5) Previous issue date: 2010<br>Resumo: Este estudo investigou os efeitos da infusão de Heteropterys aphrodisiaca no músculo esquelético, tendão e osso de ratos submetidos ao treinamento de endurance. Ratos Wistar machos foram agrupados da seguinte maneira: CS-controle sedentário, HS-H. aphrodisiaca sedentário,

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Zechel, Gero. "Gewinnung sicherer Lastannahmen aus Simulation und Messung zur Festigkeitsauslegung von Straßen- und Stadtbahnen." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-218711.

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Die Nutzung historisch solider Lastannahmen, wie sie zum Beispiel die VDV Richtlinie 152 in der Fassung von 1992 festlegt, ist für die Festigkeitsauslegung neuartiger Straßen- und Stadtbahnfahrzeuge unzureichend, da die Annahmen und Methoden der Komplexität und insbesondere der Nichtlinearität moderner Fahrzeugkonzepte keine Rechnung tragen. Diese Arbeit zeigt auf, wie sich entstandene Lücken in den Lastannahmen durch Simulation und Messung von Fahrzeug und Gleis analysieren, verstehen und schließen lassen. Den Kern bildet dabei der Einsatz detaillierterer Simulationsmodelle von Fahrzeug

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Fourie, Dehann. "Optimisation of electric long endurance unmanned aerial vehicles." Thesis, 2012. http://hdl.handle.net/10210/4968.

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M.Ing.<br>Sustained or long endurance solar powered flight is defined as an aircraft capable of main- taining flight through multiple day-night flight cycles, using only solar power and rechargable energy stores. The project is focused on developing solar powered flight theory and real-world unmanned aerial vehicle implementations. The important aspects of system design are es- tablished and studied at a fundamental theoretical level. A preliminary design is conducted with endurance optimisation as the main aim. The optimisation process aims to establish a theoretical basis for sustained solar

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Sousa, Joana Carlota Caires. "Solar System for a Long Endurance Electric UAV." Master's thesis, 2015. http://hdl.handle.net/10400.6/6480.

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Fossil fuels such as coal, oil and natural gas, are the worldwide primary energy resources. Energy is essencial to the peoples’ well-being and society development, as it is known today and expected in the future to produce and use energy in a sustainable way is vital to our civilization. However, dependence on fossil fuel is awfully high and it is necessary to hinder their use in several industries as it is a limited resource. In the Aeroespace Industry solar energy has been gaining widespread development, becoming the solution to many negative factors. This Master Thesis includes a conceptual

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Yeh, Chia-Hsu, and 葉家序. "Wing Construction of Solar High Altitude Long Endurance UAV." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/khk8q2.

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碩士<br>國立虎尾科技大學<br>飛機工程系航空與電子科技碩士班<br>105<br>Solar powered High Altitude Long Endurance (HALE) UAV, which is designed to fly for days in high altitude, can carry the communication equipment, and research platforms for missions. In order to stay for days in the high attitude, it is crucial to reduce the structural weight as much as possible which maintains the necessary structure strength. Light weight material with high specific strength, such as carbon fiber composite material, high density Styrofoam and aviation plywood, has been extensively used for the wing construction. The streamline fair

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Zao-SinLan and 藍艁昕. "The Design and Realization of Long Endurance Unmanned Aerial Vehicle." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/aqa5bv.

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碩士<br>國立成功大學<br>航空太空工程學系<br>102<br>In this thesis, an unmanned aircraft system (UAS) Dragon Fly-II is designed, which can be used in the survey and disaster reduction. A process of design and test is built for an unmanned aerial vehicle. It can be divided into four parts, including aircraft design, controller design, subsystem establishment, and flight test. In the first part, different types of UAS are compared to decide which one is appropriate for required flight behavior. Preliminary design and detail design are shown according to the analysis of aerodynamics, lift, and drag efficiency. In

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Duarte, Alexandre Emanuel Guerreiro. "Development of the Structure of a long Endurance Electric UAV." Master's thesis, 2016. http://hdl.handle.net/10400.6/6529.

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The goal of this project is to design and create the structure of a long endurance unmanned aerial vehicle (UAV) using solar power. The design’s main requirement was the creation of a low weight structure to handle diverse missions with a 1 Kilogram of payload. The UAV structure was divided in three parts: fuselage, empennages and empennage support, designed using CATIA® to verify interfaces and to study the positioning of the systems access and functionality. Because the main target is to build a low weight structure, the carbon fibre and wood were chosen for the fuselage, empennage support a

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Chy-WeiHo and 何琦偉. "A Power Matching Approach for a Long Endurance Electric Airplane Design." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/8dg24e.

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博士<br>國立成功大學<br>航空太空工程學系<br>107<br>The unmanned aircraft industry is developing much safer, lower noise and more efficient power technologies to sustain the transportation industry. Electric motors have many advantages over internal combustion engines. Some of these advantages include lower noise, higher torque, higher energy efficiency and lower maintenance costs. For this reason, hybrid electric powered drones are gradually becoming popular. The main objective of this dissertation is to develop a set of procedures by integrating aircraft performance, propeller performance and motor performan

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Li, Jian-Wei, and 李建緯. "Long Endurance Multi-rotor UAV Design and Development with Ground Power Supply." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/g8zz8b.

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碩士<br>國立虎尾科技大學<br>航空與電子科技研究所<br>103<br>In recent decade, unmanned aerial vehicle (UAV) is developing rapidly and the civil applications of multi-rotor is the most popular, due to advantages of vertical takeoff and landing, hovering, slow cruise and other characteristics. The most of multi-rotor use lithium polymer battery as main power source, but the battery capacity has limit such that it can’t achieve long endurance. This research referred to the existing design to have long endurance of multi-rotor flight ability, this research adopt ground power passing through AC generator, DC power sup

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Rodrigues, Afonso Santos. "Airframe assembly, systems integration and flight testing of a long endurance electric UAV." Master's thesis, 2017. http://hdl.handle.net/10400.6/7913.

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The need to adopt new techniques and practices in the Aerospace Industry branch is a consequence of technological development. The present work aims to study the use of solar power as a main energy source in the aviation, in this case for a flight of long endurance of an unmanned air vehicle. This master thesis follows on previous works of the LEEUAV, where it was done the design and construction of a long endurance unmanned aerial system. Thus, the main objective of this work is the systems integration, flight testing and concepts validation. LEEUAV, a prototype of 4.5 meters’ wingspan

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Gray, Taylor. "Pulmonary Vascular Mechanics in Long-standing Male Endurance Athletes at Rest and During Exercise." Thesis, 2013. http://hdl.handle.net/1807/42857.

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This study examined right-ventricular-pulmonary arterial (RV-PA) coupling and pulmonary vascular mechanics during acute exercise in 12 middle-aged men with a long-standing history of endurance training. Subjects underwent simultaneous right-heart catheterization and echocardiography, with measures obtained at steady state heart rates of 100, 130 and 150 beats/min. Subjects were highly trained and displayed RV remodeling of endurance-trained athletes. During exercise at 100 beats/min, systolic, diastolic, and mean pulmonary artery pressure increased significantly from rest, as did pulmonary ca

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