Дисертації з теми "OFS system"
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Burton, Frank R. "Trade-offs in system of systems acquisition." Thesis, University of York, 2014. http://etheses.whiterose.ac.uk/7686/.
Повний текст джерелаStraka, Michal. "Využití fotovoltaických systémů v Off-grid aplikacích." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219396.
Повний текст джерелаBrown, Quincy Lee Frank Salvucci Dario. "Mobile intelligent tutoring system : moving intelligent tutoring systems off the desktop /." Philadelphia, Pa. : Drexel University, 2009. http://hdl.handle.net/1860/3114.
Повний текст джерелаEl, Zein Musadag. "Off-grid Wind Power Systems: Planning and Decision Making." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-396057.
Повний текст джерелаIrvall, Per. "Obstacle Avoidance System (OAS)." Thesis, KTH, Reglerteknik, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-106251.
Повний текст джерелаHavránek, Miroslav. "Větrná elektrárna grid-off, princip, účinnost, návratnost." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220157.
Повний текст джерелаLin, Hong. "Performance of back-off algorithms." Thesis, University of Ottawa (Canada), 2009. http://hdl.handle.net/10393/28130.
Повний текст джерелаMolino, Nicholas Anthony. "A multi-level trade-off methodology for analyzing collaborative system-of-system alternatives." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53585.
Повний текст джерелаPedroza, Moises, and Filiberto Macias. "OFF-RANGE CORRIDOR SUPPORT." International Foundation for Telemetering, 2000. http://hdl.handle.net/10150/606814.
Повний текст джерелаWhite Sands Missile Range is supporting Ballistic Missile Defense Organization (BMDO) target firings from Ft. Wingate, NM. This two Off-Range Corridor allows BMDO to conduct long range testing within the continental U.S. The Transportable Range Augmentation and Control System (TRACS), consisting of a control van and one of two Mobile Telemetry Systems (MTS), provide the necessary on-site telemetry support. The Dual Remote Interferometer System (DRDAS) that tracks the telemetry RF carrier in support of Missile Flight Safety (MFS) is also included in this paper. This paper describes the telemetry support scenario in terms of preliminary simulations followed by real-time support. Real-time support consists of data distribution from the MTS to the Telemetry Distribution Center, TRACS Control van, Missile Flight Safety display van, Project Support vans, on-site data processing, as well as relaying raw data to the main WSMR Telemetry Data Center (TDC) for real-time analysis. As soon as telemetry data arrives at the TDC, it is converted into information. This information is used by MFS during real-time monitoring of vehicle performance. This paper includes the methods used for the conversion of data into information on-site and at TDC. Real-time data processing involves multiple independent systems performing their respective tasks on a particular segment of data.
Onyia, Chukwuebuka Louis. "Nanogrid For Renewable Off-Grid System." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-397052.
Повний текст джерелаBasil, Daniel L. "A systems engineering approach to the design of a COTS management system." Master's thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-12162009-020103/.
Повний текст джерелаHermansson, Caroline, and Karolina Bergkvist. "Är off-grid framtiden för det svenska elsystemet? : En analys utifrån Flernivå-perspektivet." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-44818.
Повний текст джерелаThe purpose of this master thesis is to study whether the off- grid scenario is a potential direction in the Swedish energy landscape of the future, and to investigate what can drive such development. For this master thesis, a qualitative research strategy has been applied, through an abductive approach towards the found empirical material and theory. An empirical data collection has been carried out in the form of semi-structured interviews with ten actors in the Swedish electricity grid market. Subsequently, a thematic analysis has been carried out, in which the empirical material is set against the theory. The study shows that there today are several factors that can drive the development towards an off-grid electricity system in Sweden. In the study’s empirical material, it is possible to find signs that most informants believe that change in today’sSwedish electricity system is needed. However, how likely it is that such a change process will take place, the study finds no evidence for. The factors that would drive the development towards an electricity system characterized by off-grid can be identified as price development, development in other sectors, changed tariff set, decentralization, legislation, increased popularity and examples where off-grid has been realized.
Nygren, Joel, and Patric Hjort. "Systemuppbyggnad och entreprenörskap från grunden : Fallstudie: ”off- grid” vatten- och avloppslösning på Värmdö." Thesis, Mälardalens högskola, Industriell ekonomi och organisation, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-49101.
Повний текст джерелаProblemställning: Hur kan Aspviksmodellen generera nytta för den traditionellt fungerande VA-branschen? Vilka är de huvudsakliga utmaningarna för regimaktörer att implementera system liknande det som härrör från Aspviksmodellen? Syfte: Studiens syfte är tvådelat. För det första ämnar vi undersöka systemuppbyggnad och entreprenörskap från grunden i ett lokalt VA- projekt och dess affärsmodell. För det andra syftar studien till att ge förståelse för hur organisationen och VA-utbyggnadsprocessen skiljer sig mellan det lokala VA-projektet och den befintliga regimen. Metod: Studien var av kvalitativ karaktär med utgångspunkt i en abduktiv ansats. Den teoretiska referensramen var baserad på vetenskapliga publikationer och böcker samt studentlitteratur. Den empiriska datainsamlingen utgjordes av insamling av primära och sekundära data, varav primärdata erhållits genom totalt 13 semistrukturerade intervjuer och sekundärdata via webbsidor, offentligt tryck (lagar och förordningar) och övriga källor. Utifrån den teoretiska referensramen och den empiriska data genomfördes en tematisk analys. Slutsats: Aspviksmodellen kan generera nytta då den bidrar med att tillhandahålla en affärsmässig strategi med ökad transparens och visualisering över vilka möjligheter branschaktörer har och vad det kan kosta. Med transparens blev rådande problem och flaskhalsar i branschen mer tydliga. Det finns stora miljömässiga fördelar med att öka utbyggnadstakten av det kommunala VA-nätet. Från regimens synvinkel är det huvudsakligen vattentjänstlagen i sig, 6 § i synnerhet som utgör en utmaning mot en effektivare utbyggnad av VA-nätet, både ekonomiskt och tidsmässigt. För att hantera det krävs någon organisatorisk förändring på regimnivå för att kunna hantera flera projekt samtidigt, alternativt att från regimens sida ge ett ökat stöd till privata initiativ i samma slag som Aspviksprojektet.
Leitman, Valentín. "Koncept nabíjecí stanice s možností off-grid provozu pro elektrokola." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-319544.
Повний текст джерелаOzaslan, Mustafa Onur. "Trade-off Models In Sustainable System Engineering." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610784/index.pdf.
Повний текст джерелаChampion, James. "A 3-CHANNEL MONOPULSE TRACKING RECEIVER SYSTEM USING COMMERCIAL OFF-THE-SHELF EQUIPMENT." International Foundation for Telemetering, 1998. http://hdl.handle.net/10150/607375.
Повний текст джерелаThree-channel monopulse tracking receiver systems are commonly used for high performance tracking of satellites, missiles, or aircraft to maximize the reception of data. Typically, the receiver in such systems are custom designed for their end purpose. This results in a high cost to cover the development, service, and support of a highly specialized piece of equipment. This paper covers the requirements and performance of a 3-channel monopulse tracking receiver assembled from commercial-off-the-shelf (COTS) equipment. Such a system provides an option for designing or upgrading tracking stations with the lower cost, larger support base, and greater system configuration choices that are available with COTS equipment.
Sridaran, S. "Off-line robot vision system programming using a computer aided design system." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/54373.
Повний текст джерелаMaster of Science
Chaney, William D. Corzine Mark Paolercio Adrianne L. "United States Army Land Mobile Radio communication system impacts of information assurance on Commercial Off-The-shelf systems /." Monterey, Calif. : Naval Postgraduate School, 2010. http://edocs.nps.edu/npspubs/scholarly/JAP/2010/Jun/10Jun%5FChaney%5FJAP.pdf.
Повний текст джерелаAdvisor(s): Boudreau, Michael W. ; Alternate Reader(s): Willins, Katrina ; Smith, Nathan. "June 2010." "Joint applied project"--Cover. Description based on title screen as viewed on July 14, 2010. Author(s) subject terms: Information Assurance (IA), Commercial Off-The Shelf (COTS), Land Mobile Radio (LMR), DoD Information Assurance Certification and Accreditation Process (DIACAP), Association of Public Safety Communications Officials International (APCO) 25, National Telecommunications and Information Administration (NTIA) Includes bibliographical references (p. 47-49). Also available in print.
Chaney, William D., Adrianne L. Paolercio, and Mark Corzine. "United States Army Land Mobile Radio communication system: impacts of information assurance on Commercial Off-The-shelf systems." Monterey, California. Naval Postgraduate School, 2010. http://hdl.handle.net/10945/10517.
Повний текст джерелаThis Joint Applied Project examined the technical, operational and programmatic implementation of Information Assurance (IA) as it relates to the Commercial-Off-the-Shelf (COTS) Land Mobile Radio (LMR) program within the United States (U.S.) Army. This project provides an overview of the LMR system, its capabilities and technical requirements, as well as the IA processes and requirements. The project then examines the technical aspects and impacts of implementing the IA requirements on the LMR system with possible interoperability with the Global Information Grid (GIG). As a result of this project, the U.S. Army will have a better understanding of the impact of IA on fielded LMR systems and its future impact to critical communications.
Boyer, Kyle, Laura Brubaker, Kyle Everly, RIchard Herriman, Paul Houston, Sean Ruckle, Rory Scobie, and Ian Ulanday. "AN EXPANDED COMMUNICATIONS SYSTEM FOR OFF-GRID TELEMETRY." International Foundation for Telemetering, 2017. http://hdl.handle.net/10150/626973.
Повний текст джерелаGordon, Greg P. (. "Laser position locating system for off-road vehicles /." Connect to resource, 1987. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1200512216.
Повний текст джерелаGordon, Greg P. "Laser position locating system for off-road vehicles." The Ohio State University, 1987. http://rave.ohiolink.edu/etdc/view?acc_num=osu1200512216.
Повний текст джерелаDufka, Zbyněk. "Webový systém pro správu elektronických dokumentů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-220379.
Повний текст джерелаKejda, Petr. "Konstrukce zkušebního zařízení pro ovlivňování adheze v kontaktu kola s kolejnicí." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231995.
Повний текст джерелаMartinsson, Christoffer. "Requirements Specifications Simplified and Adapted." Thesis, Örebro University, Swedish Business School at Örebro University, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-4832.
Повний текст джерелаSystems development projects and their documents are more or less standardized and can mainly be applied on systems that are supposed to be built from scratch, or updated. In pace with the number of IT-systems are increasing worldwide there is no need for every organization to build their own IT-system. Nowadays it is also possible to purchase licenses which allow the purchaser to modify or add functions to the system. Along with those changes, there have been an increased amount of “rapid development methods” such as Agile and “Quick and Dirty” solutions, but these methods and perspectives are mainly focusing on entire systems development processes, as the old ones, but quicker.
If a company purchases an off-the-shelf system with source code available, there is no real need to go through a proper systems development process. During interviews with a small company that has acquired a system as mentioned above, the researcher realized that only one single document is needed, the requirements specification. Today’s requirements specifications can be either well detailed or less, but a project still needs the details specified. Combining a known agile development process with IEEE’s standardized requirements specification, a new way to proceed with projects based on one single document (the requirements specification) has been made. This document also has a focus on simplicity for the inexperienced readers, but with the depth that every developer has got a use for.
Curry, Diarmuid. "Data Acquisition Blasts Off - Space Flight Testing." International Foundation for Telemetering, 2009. http://hdl.handle.net/10150/606142.
Повний текст джерелаIn principle, the requirements for a flight test data acquisition system for space testing (launch vehicles, orbiters, satellites and International Space Station (ISS) installations) are very similar to those for more earth-bound applications. In practice, there are important environmental and operational differences that present challenges for both users and vendors of flight test equipment. Environmental issues include the severe vibration and shock experienced on take-off, followed by a very sharp thermal shock, culminating (for orbital vehicles) in a low temperature, low pressure, high radiation operating environment. Operational issues can include the need to dynamically adapt to changing configurations (for example when an instrumented stage is released) and the difficulty in Telemetering data during the initial launch stage from a vehicle that may not be recoverable, and therefore does not offer the option of an on-board recorder. Addressing these challenges requires simple, rugged and flexible solutions. Traditionally these solutions have been bespoke, specifically designed equipment. In an increasingly cost-conscious environment engineers are now looking to commercial off-the-shelf solutions. This paper discusses these solutions and highlights the issues that instrumentation engineers need to consider when designing or selecting flight test equipment.
O'Cull, Douglas C. "A COMPACT, LIGHTWEIGHT, LOW POWER, MULTI-FUNCTION TELEMETRY RECEIVER/COMBINER SYSTEM PROVIDES "HANDS OFF" AUTOMATION FOR SYSTEMS COST REDUCTION." International Foundation for Telemetering, 1994. http://hdl.handle.net/10150/608841.
Повний текст джерелаWith the increased concerns for reducing cost and improving reliability in today's telemetry systems, many users are employing simulation and automation to guarantee reliable telemetry systems operation. This places an increased demand on the remote capabilities of the equipment used in the telemetry system. Furthermore, emphasis has been placed on the ability to decrease the space and power consumption of the telemetry system to facilitate transportability of the a single telemetry system to multiple sites. Finally, today's telemetry systems demand that all equipment provide multiple functions to provide the maximum performance for the lowest system cost.
Giddens, Henry. "Off-body antenna analysis and system level impact for wireless remote health monitoring systems in the 2.4 GHz band." Thesis, University of Bristol, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.685968.
Повний текст джерелаCraig, Michael T. "Economic and Environmental Costs, Benefits, and Trade-offs of Low-carbon Technologies in the Electric Power Sector." Research Showcase @ CMU, 2017. http://repository.cmu.edu/dissertations/1099.
Повний текст джерелаBörjesson, Holme, and Filiph Lindskog. "Går det att köpa personuppgifter på bilskroten? : Ett arbete om digital forensik på begagnade bildelar." Thesis, Högskolan i Halmstad, Akademin för informationsteknologi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-42369.
Повний текст джерелаIn modern vehicles, data from the user of the vehicle is often stored when a mobile phone or other device is paired through Bluetooth or USB connection. In cases where this data contains personal data, they may be of interest in an investigation and may be worth protecting from a privacy perspective. What happens to this data when the car is scrapped? When a car is scrapped, it is dismantled and the parts that can be made money from are sold by the scrap company. This can be anything from shock absorbers, wheels and steering wheels, to electronic components and infotainment devices. In this report, personal data was extracted from three such infotainment devices purchased from scrap companies. The most successful method was to remove the correct storage circuit from the infotainment device circuit board and extract its data by direct connection. In all cases, the information has been structured in a familiar file system which could be mounted. In all three investigated infotainment devices, personal data were extracted. The result shows that there are deficiencies in the handling of personal data when a car is scrapped.
Han, Changan. "Neural Network Based Off-line Handwritten Text Recognition System." FIU Digital Commons, 2011. http://digitalcommons.fiu.edu/etd/363.
Повний текст джерелаLoPresti, Patrick Joseph. "Tadpole--an off-line router for the NuMesh system." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/42667.
Повний текст джерелаIncludes bibliographical references (p. 59-60).
by Patrick Joseph LoPresti.
M.S.
Brainerd, Steve. "Off-axis illumination for extending optical microlithographic system performance /." Full text open access at:, 1993. http://content.ohsu.edu/u?/etd,185.
Повний текст джерелаHolmberg, Johan. "Ephrins off the beaten path /." Stockholm, 2003. http://diss.kib.ki.se/2003/91-7349-720-7.
Повний текст джерелаMarín, Garcia Jordi. "Off-axis holography in microwave imaging systems." Doctoral thesis, Universitat Autònoma de Barcelona, 2015. http://hdl.handle.net/10803/285129.
Повний текст джерелаIn past decades research in terahertz technology was solely motivated by instruments for topics such as astrophysics, planetary and earth sciences. Molecular line spectroscopy detection, identification and mapping of thermal emission and absorption signatures from low pressure gases comprised the main focus for most scientific requirements and motivated the development of terahertz instrumentation and technology. In spite of the scientific contributions of terahertz radiation, its spectrum is still one of the least used electromagnetics bands in commercial use. The unavailability of sources, sensors, sub-systems and instruments has been a cumbersome issue over the past years for its wide-spread use in commercial instrumentation. The combination of technological advances coming from the space-based community, along with the emergence of new applications, have managed to drive again the interest from both public and private sectors which has renown and skyrocketed the funding and research in terahertz applications. Aside from the aforementioned scientific interest, terahertz radiation has appealing characteristics such as good imaging resolution (as compared to lower frequencies), material penetration, spectroscopic capabilities, water absorption and low energy levels. The work of this thesis is part of a Spanish national research project called Terasense. The main focus of the project is to equip national academic research institutions with a completely new set of instrumentations and capabilities in order to advance towards the current state of the art in millimeter and sub-millimeter wave technologies. The main objective of this thesis is to explore the viability of microwave and millimeter-wave imaging systems based on intensity-only holographic techniques. This dissertation is mostly focused on the Off-Axis Holography technique. Not only from a theoretical perspective but specially from an actual implementation standpoint. In order to do so, different experimental setups and devices have been designed and manufactured. Iteration between hardware and software has created a framework for devising and testing different imaging techniques under consideration. The frequency range W-Band (75-110 GHz) has been chosen as the main goal for all systems under study, however different setups will first be constructed, characterized and tested at X-Band (8-12 GHz) in order to build up the expertise required to work at millimeter-wave frequencies.
RAMIREZ, MISAEL ALBERTO RABANAL. "ON-OFF DIGITAL TRANSMISSION IN OPTICAL SYSTEMS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1989. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=9248@1.
Повний текст джерелаUma análise de desempenho da transmissão digital, com modulação tipo ON-OFF através de fibras óticas foi feita incluindo todos os estágios do circuito. A partir desta análise foi desenvolvido um método para o dimensionamento e o cálculo da qualidade destes sistemas óticos digitais. O método permite calcular o comprimento máximo da fibra ótica em função das características dos diversos circuitos que compõem o enlace, taxa de transmissão e objetivo de qualidade.
It was made an analysis of performance of digital transmission with modulation ON-OFF through optical fiber including all circuit phases. From this analysis it was developed a method to the dimensioning and the quality calculation of these digital optical systems. This method allows to determine the maximum length of optical fiber, since the characteristics of all enlace circuits, of date rate and the quality objective are known.
Soteriades, Andreas Diomedes. "Trade-offs in sustainable dairy farming systems." Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/18753.
Повний текст джерелаNorström, Natalie, and Martin Oskarsson. "Off Airport Bagdrop." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-158164.
Повний текст джерелаKasper, Eugene F., and Gary Leong. "AIR-GROUND TELEMETRY SYSTEMS FOR RESEARCH HELICOPTERS." International Foundation for Telemetering, 2003. http://hdl.handle.net/10150/605377.
Повний текст джерелаThis paper describes the development of a compact mobile telemetry system using commercial-off-the-shelf components. The personal computer-based systems support microwave pulse code modulation and serial spread-spectrum radio modem telemetry. The mobile ground station provides data display and archiving of test activities, air-ground communications between experimenters and the flight test crew, and acts as a flight test Differential Global Positioning System base station. The success of the systems indicates that functional telemetry capabilities can be established for small flight test programs at modest cost.
Ming-Chieh, Chen. "An Intelligent Lead Acid Battery Management System for Solar and Off-Peak Energy Storage." University of Toledo / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1333393743.
Повний текст джерелаThomas, Kurian. "Vertical Take Off and Landing Robotic Mission on Mars." Digital Commons at Loyola Marymount University and Loyola Law School, 2016. https://digitalcommons.lmu.edu/etd/450.
Повний текст джерелаStrachan, Jamie Robert. "NOVA - Nottingham Off-road Vehicle Architecture." Thesis, University of Nottingham, 2009. http://eprints.nottingham.ac.uk/10842/.
Повний текст джерелаFang, Bin, and 房斌. "Verification of off-line handwritten signatures." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31241645.
Повний текст джерелаSchuetze, Karl Thomas. "Intelligent feedback linearizing controller for an off-road electromechanical suspension system /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.
Повний текст джерелаKasim, Salim Y. "Ride Analysis For Suspension System of off-Road Tracked Vehicles." Thesis, Cranfield University, 1991. http://dspace.lib.cranfield.ac.uk/handle/1826/4664.
Повний текст джерелаOloke, David. "Development of a web-based off-highway plant information system." Thesis, University of Wolverhampton, 2003. http://hdl.handle.net/2436/97365.
Повний текст джерелаYeh, Kevin H. (Kevin Holden). "Development of multi-attribute automotive electrical system trade-off software." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/38173.
Повний текст джерелаHoglund, James R. "An expert system for off-line analysis of rotating equipment." Thesis, Virginia Tech, 1989. http://hdl.handle.net/10919/46041.
Повний текст джерелаThe analysis of rotating equipment difficulties is currently accomplished by a specialist in rotating equipment examining the signs and symptoms of the equipment, applying his expert judgement, and determining the cause of the machine's difficulty. This thesis covers the development of an off-line expert system that can be used to emulate the expert's ability to interpret the signs and symptoms of the machine, including suggestions of possible further actions to take for repairing the problem or refining the proof for the proposed cause the difficulty. An editor has also been built which will allow an expert to keep the information used by the system current with the state of the art for rotating machinery diagnostics. This thesis documents the development of the PC-based Turbo Prolog expert shell and external knowledge-base editor. The use of the system editor is illustrated by loading current diagnostic table information into a knowledge base. Then the expert program's operation is illustrated by applying the editor-formed database in a typical session. The expert shell and knowledge base can operate as a stand-alone unit for field application. Resident experts in machinery diagnostics can build and update databases for distribution to users in the company to assure full uniform utilization of the current and most correct knowledge.
Master of Science
Rotsios, Christopher. "Analysis and Design of An Off-Grid Residential Power System." DigitalCommons@CalPoly, 2020. https://digitalcommons.calpoly.edu/theses/2214.
Повний текст джерелаDe, Hart Ruan Dirk. "Advanced take-off and flight control algorithms for fixed wing unmanned aerial vehicles." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4179.
Повний текст джерелаENGLISH ABSTRACT: This thesis presents the development and implementation of a position based kinematic guidance system, the derivation and testing of a Dynamic Pursuit Navigation algorithm and a thorough analysis of an aircraft’s runway interactions, which is used to implement automated take-off of a fixed wing UAV. The analysis of the runway is focussed on the aircraft’s lateral modes. Undercarriage and aerodynamic effects are first analysed individually, after which the combined system is analysed. The various types of feedback control are investigated and the best solution suggested. Supporting controllers are designed and combined to successfully implement autonomous take-off, with acceleration based guidance. A computationally efficient position based kinematic guidance architecture is designed and implemented that allows a large percentage of the flight envelope to be utilised. An airspeed controller that allows for aggressive flight is designed and implemented by applying Feedback Linearisation techniques. A Dynamic Pursuit Navigation algorithm is derived that allows following of a moving ground based object at a constant distance (radius). This algorithm is implemented and verified through non-linear simulation.
AFRIKAANSE OPSOMMING: Hierdie tesis handel oor die ontwikkeling en toepassing van posisie-afhanklike, kinematiese leidings-algoritmes, die ontwikkeling van ’n Dinamiese Volgings-navigasie-algoritme en ’n deeglike analise van die interaksie van ’n lugraam met ’n aanloopbaan sodat outonome opstygprosedure van ’n vastevlerk vliegtuig bewerkstellig kan word. Die bogenoemde analise het gefokus op die laterale modus van ’n vastevlerk vliegtuig en is tweeledig behartig. Die eerste gedeelte het gefokus op die analise van die onderstel, terwyl die lugraam en die aerodinamiese effekte in die tweede gedeelte ondersoek is. Verskillende tipes terugvoerbeheer vir die outonome opstygprosedure is ondersoek om die mees geskikte tegniek te bepaal. Addisionele beheerders, wat deur die versnellingsbeheer gebaseerde opstygprosedure benodig word, is ontwerp. ’n Posisie gebaseerde kinematiese leidingsbeheerstruktuur om ’n groot persentasie van die vlugvermoë te benut, is ontwikkel. Terugvoer linearisering is toegepas om ’n lugspoedbeheerder , wat in staat is tot aggressiewe vlug, te ontwerp. ’n Dinamiese Volgingsnavigasie-algoritme wat in staat is om ’n bewegende grondvoorwerp te volg, is ontwikkel. Hierdie algoritme is geïmplementeer en bevestig deur nie-lineêre simulasie.