Dissertations / Theses on the topic 'Cargo unmanned aerial vehicle'
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Alfaro, Richard Alfonso Andrade. "Predictive control strategies por unmanned aerial vehicles in cargo transportation tasks." reponame:Repositório Institucional da UFSC, 2016. https://repositorio.ufsc.br/xmlui/handle/123456789/168229.
Full textMade available in DSpace on 2016-09-20T05:05:05Z (GMT). No. of bitstreams: 1 341818.pdf: 7805468 bytes, checksum: 24215969efc6a9cd28721f5d8831d2ef (MD5) Previous issue date: 2016
O desenvolvimento de veículos aéreos não tripulados (VANTs) vem despertando um grande interesse tanto no meio acadêmico quanto na indústria nas últimas décadas. Muitos campos da robótica e da teoria de controle vem sendo explorados visando melhorar o desempenho destes sistemas. Existem vários cenários onde estas aeronaves são utilizadas, tais como monitoramento de ambientes, agricultura de precisão, busca e resgate, entre outras. Dentre as diferentes aplicações destas aeronaves temos o transporte de carga suspensa por cabo, o qual tem promovido várias pesquisas relacionadas com transporte de alimentos, medicamentos e suprimentos em geral, para zonas de risco. Neste sentido, este trabalho tem como foco o uso de VANTs em tarefas de transporte de carga, considerando perturbações externas e incertezas paramétricas. A aeronave utilizada é um birotor na configuração Tilt-rotor que carrega uma carga suspensa. Um Tilt-rotor é um veículo movimentado por dois rotores inclináveis, os quais geram e direcionam forças de impulso para sustentar a aeronave. Neste estudo, é importante que a aeronave seja capaz de seguir uma trajetória predefinida enquanto estabiliza a carga suspensa mesmo quando afetada por perturbações externas ou incertezas paramétricas. Além disso, um modelo não linear multicorpo é obtido via formulação Euler-Lagrange para o VANT Tilt-rotor considerando a carga suspensa. Neste modelo foi considerado que a aeronave é composta por quatro corpos rígidos e tem dez graus de liberdade. O problema de controle é solucionado com um controlador preditivo (MPC) incremental e um não incremental, baseados no modelo linear do erro do sistema, o qual é linearizado em torno a uma trajetória genérica. Além disso, os MPCs consideram custo terminal, com o objetivo de garantir estabilidade e por consequência reduzir o horizonte de predição. Devido ao fato do sistema linear ser variante no tempo (LVT), o custo terminal é calculado mediante desigualdades matriciais lineares (LMI). Por outro lado, restrições são impostas na formulação do MPC, relacionadas com as limitações físicas dos atuadores e considerando que o VANT está confinado numa área específica. Finalmente, simulações foram realizadas para avaliar o desempenho dos controladores propostos, considerando perturbações constantes em diferentes instantes de tempo, e levando em conta incertezas paramétricas.
Abstract : The development of unmanned aerial vehicles (UAVs) has arousedgreat interest in both academia and industry in the recent decades.Many aereas of robotics and control theory have been exploited toimprove the performance of these systems. There are several scenarioswhere these aerial vehicles are used, like monitoring environment,precision agriculture, construction, search and rescue. Transportationof cable-suspended loads with UAVs is another application. This haspromoted research related to load transportation of food, medicine,and supplies in general for unsafe areas. This research is focused onthis topic, where it is necessary that the UAV follows a predenedtrajectory while stabilizing the suspended load, even if it is aectedby external disturbances. In this dissertation, two model predictivecontrollers (MPCs) are used to solve the path tracking problem of asmall scale Tilt-rotor Unmanned Aerial Vehicle (UAV) while carryinga suspended load. A Tilt-rotor is a vehicle lifted and propelled bytwo tiltable rotors, in order to control the direction of thrust forces.In the present study, it is important that the aircraft able to follow apredened trajectory while maintaining the suspended load stable evenin the presence of external disturbances and parametric uncertainties.Moreover, a rigorous multibody non-linear dynamic model is obtainedvia Euler-Lagrange formulation for the Tilt-rotor UAV with suspendedload, assuming four rigid bodies and ten degrees of freedom (DOF)of the vehicle. The control problem is solved with incremental andnon-incremental model predictive controllers, based on the linear errormodel of the system, which is linearized around a generic trajectory.Furthermore, the MPCs consider a terminal cost in order to ensurestability, allowing the prediction horizon reduction. As the linear modelis a linear time-varying (LTV) system, the terminal cost is calculatedvia linear matrix inequalities (LMI). In addition, some constraintsare imposed on the formulation, related to physical limitations of theactuators and assuming that the aircraft is conned to a particulararea. Finally, numerical simulations are performed in order to evaluatethe controllers, considering constant disturbances at dierent instantsof time, and modeling errors.
Fordham, Joseph P. "Design and Monte Carlo analysis of an unmanned aerial vehicle." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1993. http://handle.dtic.mil/100.2/ADA277648.
Full textHauss, Jean-Marc C. (Jean-Marc Claude) 1975. "Design of a unmanned aerial vehicle." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/50380.
Full textSusuz, Umut. "Aeroelastic Analysis Of An Unmanned Aerial Vehicle." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609225/index.pdf.
Full textFlightLoads and Dynamics module and MSC®
NASTRAN Aero 1 solver was performed. The analyses were carried out at sea level, 1000m, 2000m and 4000m altitudes for Mach Numbers M=0.2, 0.4 and 0.6 for the full model of the UAV. The flutter characteristics of the UAV for different flight conditions were obtained and presented. The effect of altitude on flutter characteristics has been examined and compared with the theoretical and experimental trends in the literature. Also the divergence characteristics of the full model UAV was obtained. In the study, some verification and test cases are also included. The results of the analyses of an untapered swept-wing and AGARD 445.6 wing models were compared with wind tunnel data and a maximum error of 1.3 % in the flutter speed prediction was obtained. In two different wing models the effect of taper was investigated.
Valente, Evandro Gurgel do Amaral. "Composite construction of an unmanned aerial vehicle." College Park, Md. : University of Maryland, 2006. http://hdl.handle.net/1903/3930.
Full textThesis research directed by: Dept. of Aerospace Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Waugh, Edward Michael. "An unmanned aerial vehicle for oceanographic applications." Thesis, University of Southampton, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538988.
Full textWatkiss, Eric John. "Flight dynamics of an unmanned aerial vehicle." Thesis, Monterey, California. Naval Postgraduate School, 1994. http://hdl.handle.net/10945/28222.
Full textMoments of inertia were experimentally determined and longitudinal and lateral/directional static and dynamic stability and control derivatives were estimated for a fixed wing Unmanned Air Vehicle (UAV). Dynamic responses to various inputs were predicted based upon the estimated derivatives. A divergent spiral mode was revealed, but no particularly hazardous dynamics were predicted. The aircraft was then instrumented with an airspeed indicator, which when combined with the ability to determine elevator deflection through trim setting on the flight control transmitter, allowed for the determination of the aircraft's neutral point through flight test. The neutral point determined experimentally corresponded well to the theoretical neutral point. However, further flight testing with improved instrumentation is planned to raise the confidence level in the neutral point location. Further flight testing will also include dynamic studies in order to refine the estimated stability and control derivatives
Lee, Matthew, Daniel Lierz, and Jerome Younger. "Video Tracking System for Unmanned Aerial Vehicle." International Foundation for Telemetering, 2012. http://hdl.handle.net/10150/581754.
Full textSurveillance and tracking using unmanned aerial vehicles (UAVs) is a growing field and to visually track an object independent of a flight path requires a video transmission and control system. Applications utilizing UAVs to track a stationary or moving target are plentiful, from military to local law enforcement; every application introduces an alternative to placing a human into an aircraft and increases the usefulness over a fixed position recorded video. Here we have introduced a cost effective video tracking system that will provide a constant video transmission, manual control for tracking, and further implement an automatic control system to automatically correct for the UAV's roll and yaw. The video tracking system has been designed to be cost friendly while constrained to be applicable for small UAV applications. We have detailed the successful design of our system that overcomes the imposed constraints in great detail in the sections that follow.
Guerra, Elia. "Unmanned Aerial Vehicle (UAV) per applicazioni geomatiche." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2016.
Find full textAllegretti, Marcello. "Unmanned Aerial Vehicle: tecnologie e prospettive future." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11979/.
Full textTell, Fredrik. "CCUAV : Cloud Center for Unmanned Aerial Vehicle." Thesis, Högskolan i Halmstad, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-36304.
Full textBradley, Justin, and Breton Prall. "AN UNMANNED AERIAL VEHICLE PROJECT FOR UNDERGRADUATES." International Foundation for Telemetering, 2006. http://hdl.handle.net/10150/604143.
Full textBrigham Young University recently introduced a project for undergraduates in which a miniature unmanned aerial vehicle system is constructed. The system is capable of autonomous flight, takeoff, landing, and navigation through a planned path. In addition, through the use of video and telemetry collected by the vehicle, accurate geolocation of specified targets is performed. This paper outlines our approach and successes in facilitating this accomplishment at the undergraduate level.
Ward, Paul A. "Coordinated search with unmanned aerial vehicle teams." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:37407b90-51e7-4814-936c-4817ea0c711f.
Full textSakarya, Arzu. "Multidisciplinary Design Of An Unmanned Aerial Vehicle Wing." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613606/index.pdf.
Full textmade of prepreg and wet lay-up. All wings have the same aerodynamic geometry and structural configuration under the same flight conditions. The structural designs of three wings were done by using Unigraphics NX. The finite element modeling of the wings were built by using MSC Patran package program. After the application of the loads on models, structural analyses were performed by MSC Nastran. Finally, the producibility analysis of prepreg wing model was conducted by using FiberSIM package program. The prepreg wing model was selected as optimum design with studies conducted in the study considering weight, producibility, cruise and gust stress and displacement conditions.
Söderman, Johan. "High Level Control for an Unmanned Aerial Vehicle." Thesis, Uppsala universitet, Signaler och System, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-156043.
Full textHammar, Marcus. "Controller Design for an Unmanned Reconnaissance Aerial Vehicle." Thesis, KTH, Reglerteknik, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-107514.
Full textHammerseth, Vegard B. "Autonomous Unmanned Aerial Vehicle In Search And Rescue." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for teknisk kybernetikk, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-22880.
Full textWatson, Mark T. "Vision guidance controller for an Unmanned Aerial Vehicle." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1998. http://handle.dtic.mil/100.2/ADA359702.
Full text"December 1998." Thesis advisor(s): Isaac I. Kaminer. Includes bibliographical references (p. 77). Also available online.
Toazza, Denny Antonio, and Tae Hyun Kim. "Navigation Control of an Unmanned Aerial Vehicle (UAV)." Thesis, Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-3730.
Full textThe thesis covers a new navigation algorithm for UAV to fly through several given GPS coordinates without any human interference. The UAV first gets its current position from GPS receiver via Bluetooth connection with the navigator computer. With this GPS point, it draws an optimal trajectory to next destination. During the flight, the navigator computer issues the information about which direction to turn and how much to turn. This information will be used to steer the airplane servos.
The algorithm is programmed in Java LeJOS. It uses built-in Java classes about GPS and Bluetooth. The main computer, where the navigation program runs, is a LEGO Mindstorms NXT and it is used a GPSlim240 from HOLUX as a GPS receiver.
Rao, Srinivas K. Driessen Brian. "Protective shroud for an autonomous unmanned aerial vehicle." Diss., A link to full text of this thesis in SOAR, 2006. http://soar.wichita.edu/dspace/handle/10057/677.
Full text"December 2006." Title from PDF title page (viewed on Nov. 4, 2007). Thesis adviser: Brian Driessen. Includes bibliographic references (leaves 63-65).
Dono, Thomas F. "Optimized Landing of Autonomous Unmanned Aerial Vehicle Swarms." Thesis, Monterey, California. Naval Postgraduate School, 2012. http://hdl.handle.net/10945/7331.
Full textThis research explores a future concept requiring the efficient and safe, landing and recovery of a swarm of unmanned aerial vehicles (UAVs). The presented work involves the use of an overarching (centralized) airspace optimization model, formulated analytically as a network-based model with side constraints describing a time-expanded network model of the terminal airspace in which the UAVs navigate to one or more (possibly moving) landing zones. This model generates optimal paths in a centralized manner such that the UAVs are properly sequenced into the landing areas. The network-based model is grown using agent based simulation with simple flocking rules. The resulting solution is compared to another agent-based model which uses similar avoidance rules for the landing of these UAVs, exploring the benefit of distributed computation and decision-making characteristic of swarming models. Relevant measures of performance include, e.g., the total time necessary to land the swarm. Extensive simulation studies and sensitivity analyses are conducted to demonstrate the relative effectiveness of the proposed approaches.
Kersop, Stefanus Jacobus. "Short range reconnaissance unmanned aerial vehicle / S.J. Kersop." Thesis, North-West University, 2009. http://hdl.handle.net/10394/9171.
Full textThesis (MIng (Electrical Engineering))--North-West University, Potchefstroom Campus, 2010.
Dalbakk, Lars-Eirik. "Antenna System for Tracking of Unmanned Aerial Vehicle." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elektronikk og telekommunikasjon, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-26837.
Full textSerrano, Nathan E. "Autonomous quadrotor unmanned aerial vehicle for culvert inspection." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/67752.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (p. 69).
This document presents work done to lay the foundation for an Unmanned Aerial Vehicle (UAV) system for inspecting culverts. By expanding upon prior progress creating an autonomous indoor quadrotor, many basic hardware and software issues are solved. The main new functionality needed for the culvert inspection task was to utilize the Global Positioning System (GPS) available outdoors to make up for the relative scarcity of objects visible to the Light Detection And Ranging sensor (LIDAR). The GPS data is fused in a new state estimator, which also incorporates data from the scan matcher running on the LIDAR data, as well as the data from the quadrotor's Inertial Measurement Unit (IMU). This data is combined into a single estimate of the current state (position, orientation, velocity, angular velocity, and acceleration) of the quadrotor by an Extended Kalman Filter (EKF). This new state estimate enables autonomous outdoor navigation and operation of this micro-UAV.
by Nathan E. Serrano.
M.Eng.
Pereira, Coutinho Walton. "Unmanned Aerial Vehicle routing and trajectory optimisation problems." Thesis, University of Southampton, 2018. https://eprints.soton.ac.uk/426341/.
Full textÅkesson, Elsa, Maximilian Kempe, Oskar Nordlander, and Rosa Sandén. "Unmanned Aerial Vehicle Powered by Hybrid Propulsion System." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277115.
Full textIn today’s society, with several environmental challenges such as global warming, the demand for cleanand renewable fuels is ever increasing. Since the aviation industry in Sweden is responsible for the sameamount of greenhouse gas emissions as the motor traffic, a change to a non-polluting energy source forflying vehicles would be considerable progress. Therefore, this project has designed a hybrid system of abattery and a fuel cell and investigated how different combinations of battery and fuel cell sizes perform ina drive cycle, through computer modelling. As batteries possess a high specific power but are heavy, thefuel cells with high specific energy complement them with a sustained and lightweight power supply,which makes the hybrid perfect for aviation. The bachelor thesis is a part of Project Green Raven, aninterdisciplinary collaboration with the institutions of Applied Electrochemistry, Mechatronics andEngineering Mechanics at KTH Royal Institute of Techology. The drive cycle simulations were done inSimulink, and several assumptions regarding the power profile, fuel cell measurements and power weremade. Three different energy management strategies were set up, determining the fuel cell powerdepending on hydrogen availability and state of charge of the battery. The strategies were called 35/65,20/80 and 0/100, and the difference between them was at which state of charge intervals the fuel cellchanged its power output. The best strategy proved to be 0/100, since it was the only option which causedno degradation of the fuel cell whatsoever.
Wilkman, Dennis, and Oscar Andersson. "Propulsion system for a small unmanned aerial vehicle." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-276078.
Full textFör obemannade flygfordon finns ett stort urval av framdrivningssystem. Beroende på det specifika valet av system varierar flygplanets egenskaper väsentligt. Valet är också beroende av storleken på farkosten själv och önskad prestanda och användbarhet. Framdrivningssystem har gjort betydande framsteg under de senaste decennierna. Skywalker X8 är en populär obemannad luftfarkost och flygs oftast elektriskt. Vilken framdrivning skulle då passa för den ursprungliga Skywalker X8 med 2 m vingspann om dess storlek i dimensioner fördubblats. Denna studie presenterar ett tidigt förslag om ett framdrivningssystem för den dubbelt så stora Skywalker X8. Det slutliga framdrivningssystemet är ett hybridsystem som består av en bränslecell och batterier, vilket ger en drifttid på 19 timmar. Resultaten visar att valmetoden fungerar som en tidig designlösning för att välja ett framdrivningssystem och bestämma dess prestanda. Det kan dock vara en felaktig representation av den fysiska modellen och måste följas upp av en mer detaljerad analys av farkosten. Det dras slutsatsen att ytterligare experiment bör göras för att verifiera de data som beräknats med denna modell.
Wikman, Dennis, and Oscar Andersson. "Propulsion system for a small unmanned aerial vehicle." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-276078.
Full textFör obemannade flygfordon finns ett stort urval av framdrivningssystem. Beroende på det specifika valet av system varierar flygplanets egenskaper väsentligt. Valet är också beroende av storleken på farkosten själv och önskad prestanda och användbarhet. Framdrivningssystem har gjort betydande framsteg under de senaste decennierna. Skywalker X8 är en populär obemannad luftfarkost och flygs oftast elektriskt. Vilken framdrivning skulle då passa för den ursprungliga Skywalker X8 med 2 m vingspann om dess storlek i dimensioner fördubblats. Denna studie presenterar ett tidigt förslag om ett framdrivningssystem för den dubbelt så stora Skywalker X8. Det slutliga framdrivningssystemet är ett hybridsystem som består av en bränslecell och batterier, vilket ger en drifttid på 19 timmar. Resultaten visar att valmetoden fungerar som en tidig designlösning för att välja ett framdrivningssystem och bestämma dess prestanda. Det kan dock vara en felaktig representation av den fysiska modellen och måste följas upp av en mer detaljerad analys av farkosten. Det dras slutsatsen att ytterligare experiment bör göras för att verifiera de data som beräknats med denna modell.
Valente, João Ricardo Pereira. "Autonomous behaviors for an unmanned mini-aerial vehicle." Master's thesis, FCT - UNL, 2008. http://hdl.handle.net/10362/1869.
Full textWagner, Anthony Julian. "Online Unmanned Ground Vehicle Mission Planning using Active Aerial Vehicle Exploration." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/90785.
Full textMaster of Science
This work presents a framework for the exploration and path planning for a collaborative aerial and ground vehicle robotic system. The system is composed of an aircraft with a camera system for obstacle detection and a ground vehicle with no sensors for obstacle detection. Two exploration algorithms were developed to guide the exploration of the aircraft. Both identify frontiers for exploration with the Dijkstra Frontier method using path planning algorithms to identify a frontier with unknown space (Dijkstra Frontier), and the other uses a sampling based path planning method (RRT Explore) to identify multiple frontiers for selection. The final algorithm developed was for to give the ground vehicle intermediate plans when an entire plan is not yet found. The algorithm is designed to keep the ground vehicle a safe distance from the unknown frontier to prevent backtracking. All the algorithms were tested in a simulation framework using Robot Operating System and one exploration method was tested on the hardware system. The results show the RRT Explore algorithm to work well for exploring the environment, performing equally or better than the Dijkstra Frontier method. The ground vehicle intermediate plan method showed a decreased traveled distance for the ground vehicle but increases in ground vehicle mission time with more conservative distances from danger. Overall, the framework showed a good exploration of the environment and performs the intended missions.
Dingus, Benjamin Ross. "Development of an Autonomous Unmanned Aerial Vehicle for Aerobiological Sampling." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/33119.
Full textMaster of Science
Scheber, Robert Thomas. "Engineering Senior Design Project: Ducted Unmanned Aerial Vehicle Development." Thesis, The University of Arizona, 2014. http://hdl.handle.net/10150/555566.
Full textSchmidt, Michael David. "SIMULATION AND CONTROL OF A QUADROTOR UNMANNED AERIAL VEHICLE." UKnowledge, 2011. http://uknowledge.uky.edu/gradschool_theses/93.
Full textBasson, Willem Albertus. "Fault tolerant adaptive control of an unmanned aerial vehicle." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/17898.
Full textENGLISH ABSTRACT: This thesis presents the development of an adaptive longitudinal control system for an unmanned aerial vehicle (UAV). The project forms part of a research effort at Stellenbosch University into different fault-tolerant control techniques for UAVs. In order to demonstrate the usefulness of fault-tolerant adaptive control, the control system was designed to handle damage-induced longitudinal shifts in the centre of gravity (CG) of the aircraft, which are known to have a dramatic effect on the stability of a fixed-wing aircraft. Using a simplified force and moment model, equations were derived which model the effect of longitudinal CG shifts on the behaviour of the aircraft. A linear analysis of the longitudinal dynamics using these equations showed that the short period mode can become unstable for backward CG shifts. An adaptive pitch rate controller with the model reference adaptive control structure was designed to re-stabilise the short period mode when the CG shifts backwards. The adaptive law was designed using Lyapunov stability theory. Airspeed, climb rate and altitude controllers were designed around the pitch rate controller to allow full autonomous control of the longitudinal dynamics of the UAV. These outer loops were designed with constant parameters, since they would be unaffected by CG shifts if the adaptive pitch rate controller performed as desired. Pure software simulations as well as hardware-in-the-loop simulations showed that the adaptive control system is able to handle instantaneous shifts in the centre of gravity which would destabilise a fixed-gain control system. These simulation results were validated in flight tests, where the aircraft was destabilised using positive feedback and re-stabilised by the adaptive control system. Thus the simulation and flight test results showed that an adaptive control can re-stabilise an unstable aircraft without explicit knowledge of the change in the aircraft dynamics, and therefore could be effective as part of an integrated fault-tolerant control system.
AFRIKAANSE OPSOMMING: Hierdie tesis bied die ontwikkeling aan van ’n aanpassende longitudinale beheerstelsel vir ’n onbemande vliegtuig. Die projek is deel van navorsing by die Universiteit van Stellenbosch oor verskillende fout-tolerante beheertegnieke vir onbemande vliegtuie. Om die doeltreffendheid van aanpassende beheer te demonstreer, is die beheerstelsel ontwerp om situasies te kan hanteer waar die vliegtuig só beskadig word dat sy massamiddelpunt agtertoe skuif, wat ’n groot invloed op die stabiliteit van ’n vastevlerk-vliegtuig kan hê. ’n Vereenvoudigde model van die kragte en momente wat op die vliegtuig inwerk is gebruik om vergelykings af te lei wat beskryf hoe die gedrag van die vliegtuig verander as die massamiddelpunt agtertoe verskuif. Hierdie vergelykings is gebruik in ’n lineêre analise van die longitudinale dinamika van die vliegtuig, wat getoon het dat die kortperiode-modus onstabiel kan raak as die massamiddelpunt agtertoe verskuif. ’n Aanpassende heitempobeheerder met die modelverwysings-aanpassende beheerstruktuur is ontwerp om die kortperiode-modus weer te stabiliseer wanneer die massamiddelpunt agtertoe verskuif. Die aanpassingswet is ontwerp deur die gebruik van Lyapunov se stabiliteitsteorie. Lugspoed-, klimtempo- en hoogtebeheerders is rondom die aanpassende heitempobeheerder ontwerp sodat die longitudinale dinamika van die vliegtuig heeltemal outonoom beheer kan word. Hierdie buitelusse is ontwerp met vaste parameters, aangesien hulle nie geraak sal word deur verskuiwings in die massamiddelpunt as die aanpassende heitempobeheerder na wense werk nie. Suiwer sagteware-simulasies, sowel as hardeware-in-die-lus-simulasies, het getoon dat die aanpassende beheerstelsel oombliklike verskuiwings in die massamiddelpunt goed kan hanteer, waar sulke verskuiwings ’n beheerstelsel met vaste parameters onstabiel sou maak. Hierdie simulasie-resultate is bevestig deur vlugtoetse te doen, waar die vliegtuig onstabiel gemaak is deur positiewe terugvoer, en weer deur die aanpassende beheerstelsel stabiel gemaak is. Die simulasie- en vlugtoetsresultate wys dus dat aanpassende beheer ’n onstabiele vliegtuig weer kan stabiliseer sonder eksplisiete kennis van die veranderinge in die dinamika van die vliegtuig. Aanpassende beheer kan dus doeltreffend wees as deel van ’n geïntegreerde fout-tolerante beheerstelsel.
Chaturapruek, Sorathan. "A Mathematical Framework for Unmanned Aerial Vehicle Obstacle Avoidance." Scholarship @ Claremont, 2014. http://scholarship.claremont.edu/hmc_theses/60.
Full textFuglaas, Simen. "Precision Airdrop from a Fixed-Wing Unmanned Aerial Vehicle." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for teknisk kybernetikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-25909.
Full textLee, Kyuho. "Development of unmanned aerial vehicle (UAV) for wildlife surveillance." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0008979.
Full textEdwards, Barrett Bruce. "An Onboard Vision System for Unmanned Aerial Vehicle Guidance." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2381.
Full textPeppa, Maria Valasia. "Morphology-based landslide monitoring with an unmanned aerial vehicle." Thesis, University of Newcastle upon Tyne, 2018. http://hdl.handle.net/10443/4115.
Full textCraparo, Emily M. (Emily Marie) 1980. "Natural language processing for unmanned aerial vehicle guidance interfaces." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/16656.
Full textIncludes bibliographical references (p. 73-78).
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
In this thesis, the opportunities and challenges involved in applying natural language processing techniques to the control of unmanned aerial vehicles (UAVs) are addressed. The problem of controlling an unmanned aircraft via natural language inputs is formulated as a feedback control problem, and notions of state, controllability, and observability are defined under this model. An implementation of such a system is also described. The phraseology of the existing air traffic control language is used as a base command set; to form this command set, a corpus of air traffic control commands was gathered from recorded exchanges between pilots and controllers at Boston's Logan Airport, as well as Laurence G. Hanscom Field in Bedford, MA, and these were used as the "target language" for this implementation. Knowledge of air traffic control and airport operations, combined with existing natural language processing techniques, is used to achieve a higher recognition success rate than a traditional natural language processor designed for a more general domain of discourse would. This :is the first known attempt at formalizing air traffic control phraseology for use in an unmanned system.
by Emily M. Craparo.
S.M.
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.
Full textDowd, Garrett E. "Improving Autonomous Vehicle Safety using Communicationsand Unmanned Aerial Vehicles." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1574861007798385.
Full textMize, Lloyd B. IV. "Development of a Multiple Vehicle Collaborative Unmanned Aerial System." VCU Scholars Compass, 2011. http://scholarscompass.vcu.edu/etd/2527.
Full textRaza, Syed Ali. "Design and control of a quadrotor unmanned aerial vehicle." Thesis, University of Ottawa (Canada), 2010. http://hdl.handle.net/10393/28373.
Full textDuberg, Daniel. "Safe Navigation of a Tele-operated Unmanned Aerial Vehicle." Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-221701.
Full textObemannad luftfarkoster (UAV:er) kan navigera i inomhusmiljöer och genom miljöer som är farliga eller svåra att nå för människor. Detta gör dem lämpliga för användning i sök- och räddningsuppdrag och av akutmottagning och rättsväsende genom ökad situationsmedvetenhet. Dock är det även för en erfaren UAV-teleoperatör krävande och svårt att kontrollera en UAV i dessa situationer utan att kollidera med hinder. Denna avhandling presenterar ett människa-UAV-gränssnitt tillsammans med en kollisionsundvikande metod, båda optimerade för en mänsklig teleoperatör. Målet är att förenkla uppgiften att navigera en UAV i inomhusmiljöer. Utvärdering av systemet görs genom att testa det mot ett antal användningsfall och en användarstudie. Resultatet av denna avhandling är en kollisionsundvikande metod som lyckas skydda UAV från hinder och samtidigt tar hänsyn till operatörens avsikter.
Owen, Mark Andrew. "Aerial Rendezvous Between an Unmanned Air Vehicle and an Orbiting Target Vehicle." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2881.
Full textKällström, Alexander, and Jagesten Albin Andersson. "Autonomous Landing of an Unmanned Aerial Vehicle on an Unmanned Ground Vehicle in a GNSS-denied scenario." Thesis, Linköpings universitet, Reglerteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-167924.
Full textBoulekchour, M. "Robust convex optimisation techniques for autonomous vehicle vision-based navigation." Thesis, Cranfield University, 2015. http://dspace.lib.cranfield.ac.uk/handle/1826/9412.
Full textHelmick, Daniel Martin. "Engine modeling, control, and synchronization for an unmanned aerial vehicle." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/16750.
Full textDittrich, Joerg S. "Design and integration of an unmanned aerial vehicle navigation system." Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/15669.
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