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dc.contributor.advisorKluever, Craigeng
dc.contributor.authorEagon, Darren Leeeng
dc.date.issued2023eng
dc.date.submitted2023 Falleng
dc.description.abstractThis study uses a direct optimization technique to find optimized low-thrust trajectories for spacecraft that minimize fuel consumption. By using analytic orbital averaging, a spacecraft's equations of motion are simplified which enables the development of a rapid trajectory propagating algorithm. The algorithm, which restricts the spacecraft's thrust to the QW plane, produces analytic results which are combined with MATLAB's fmincon optimization routine for fast, constrained nonlinear optimization. This research discusses the choice of control variables, control profile discretization, and the determination of the number of control nodes. Case studies are presented, including a benchmark from GTO to GEO, demonstrating the benefits over using a similar control law. Additionally, case studies examining different thrust-to-mass ratios for an extended GTO to GEO transfer, and a MEO to GPS transfer for deploying new navigation satellites are presented. The optimized trajectories show a consistent reduction in [delta]V compared to the control law, with generally smooth and predictable profiles. Notably, fuel consumption decreases as transfer times increase and coast arcs expand. The findings endorse this method's efficacy for rapidly optimizing low-thrust trajectories.eng
dc.description.bibrefIncludes bibliographical references.eng
dc.format.extentxii, 96 pages : illustrations (color)eng
dc.identifier.urihttps://hdl.handle.net/10355/98821
dc.identifier.urihttps://doi.org/10.32469/10355/98821eng
dc.languageEnglisheng
dc.publisherUniversity of Missouri--Columbiaeng
dc.relation.ispartofcommunityUniversity of Missouri--Columbia. Graduate School. Theses and Dissertationseng
dc.titleA direct approach for computationally efficient low-thrust trajectory optimizationeng
dc.typeThesiseng
thesis.degree.disciplineMechanical and Aerospace Engineering (MU)eng
thesis.degree.grantorUniversity of Missouri--Columbiaeng
thesis.degree.levelMasterseng
thesis.degree.nameM.S.eng


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