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dc.contributor.authorMcClure, Erin Kathleenen_US
dc.date.accessioned2006-09-01T19:32:46Z
dc.date.available2006-09-01T19:32:46Z
dc.date.issued2006-07-07en_US
dc.identifier.urihttp://hdl.handle.net/1853/11555
dc.description.abstractThis dissertation investigates the development of a methodology suitable for the evaluation of advanced propulsion concepts. At early stages of development, both the future performance of these concepts and their requirements are highly uncertain, making it difficult to forecast their future value. A systematic methodology to identify potential advanced propulsion concepts and assess their robustness is necessary to reduce the risk of developing advanced propulsion concepts. Existing advanced design methodologies have evaluated the robustness of technologies or concepts to variations in requirements, but they are not suitable to evaluate a large number of dissimilar concepts. Variations in requirements have been shown to impact the development of advanced propulsion concepts, and any method designed to evaluate these concepts must incorporate the possible variations of the requirements into the assessment. In order to do so, a methodology had to do two things. First, it had to systemically identify a probabilistic distribution for the future requirements. Such a distribution would allow decision-makers to quantify the uncertainty introduced by variations in requirements. Second, the methodology must assess the robustness of the propulsion concepts as a function of that distribution. These enabling elements have been synthesized into new methodology, the Evolving Requirements Technology Assessment (ERTA) method. The ERTA method was used to evaluate and compare advanced propulsion systems as possible power systems for a hurricane tracking, High Altitude, Long Endurance (HALE) unmanned aerial vehicle (UAV). The problem served as a good demonstration of the ERTA methodology because conventional propulsion systems will not be sufficient to power the UAV, but the requirements for such a vehicle are still uncertain.en_US
dc.format.extent2948761 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherGeorgia Institute of Technologyen_US
dc.subjectTechnology assessmentsen_US
dc.subjectSimulated annealing
dc.subjectAdvanced propulsion concepts
dc.subjectCross impact analysis
dc.subject.lcshPropulsion systems Design and constructionen_US
dc.subject.lcshUncertainty (Information theory)en_US
dc.subject.lcshCombinatorial probabilitiesen_US
dc.subject.lcshDecision support systemsen_US
dc.subject.lcshDrone aircraft Design and constructionen_US
dc.titleAn evolving-requirements technology assessment process for advanced propulsion conceptsen_US
dc.typeDissertationen_US
dc.description.degreePh.D.en_US
dc.contributor.departmentAerospace Engineeringen_US
dc.description.advisorCommittee Chair: Dimitri Mavris; Committee Member: Alan Porter; Committee Member: Daniel Schrage; Committee Member: Danielle Soban; Committee Member: Gary Sengen_US


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