Examinando por Autor "Betancur Valencia, Esteban"
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Ítem Diseño y construcción del prototipo de un vehículo guiado automáticamente - AGV para la empresa SOFASA S.A(Universidad EAFIT, 2011) Betancur Valencia, Esteban; Betancur Paz, Julián David; Bolívar Gómez, Jaime Alonso; Osorio Gómez, GilbertoEl presente artículo expone el proceso de diseño y construcción de un vehículo guiado automático para la planta ensambladora de vehículos RENAULT, SOFASA S.A. -- Esta empresa acudió a la universidad EAFIT para plantear el desarrollo conjunto de la implementación del prototipo de un sistema AGV (automated guided vehicle) en la línea final de ensamble número dos, conformado por un solo vehículo -- Además se plantea realizar una investigación teniendo en cuenta las necesidades actuales de la industria local para determinar el conocimiento y la aplicabilidad de este tipo de sistemasÍtem Energy management strategy for a solar race car including meteorologic and probabilistic variable(2018) Betancur Valencia, Esteban; Osorio Gómez, GilbertoThis thesis describes the energy management strategy for racing solar cars, the racing strategy is treated as an optimal control problem with random variables and uncertain predictions. A computational model is developed for estimating the vehicle performance under specific circumstances. Two evolutionary heuristic optimization methods are implemented and tested for this case, their effectiveness, convergence and efficiency is measured and compared to exhaustive search approaches. The dependency on solar radiation is validated using the computational model with different test cases. In order to reduce the uncertainties on the solar radiation estimation, satellite images are used as inputs to image processing and machine learning techniques, their efficacy is compared. Finally, a validation case is executed and different scenarios are evaluated with the inclusion of the proposed methods, the experimental performance of a vehicle obtained using the strategy in the World Solar Challenge 2015 is exposed and compared to the predicted results from the simulation.Ítem Topology and Shape optimization for CFD-Computational Fluid Dynamics(Universidad EAFIT, 2014) Betancur Valencia, Esteban; García Ruíz, Manuel JulioOn this work a CFD optimization problem is treated from two different points of view -- In one hand, topology optimization using a homogenization method based on the Brinkmann penalization is presented, implemented using the finite elements method and optimized with a mesh adaptation step -- Secondly, a shape optimization method based on Hadamard boundary variation using differentiation with respect to the domain is developed, imple- mented and tested -- Finally, a coupling of both methods taking advantage of their own attributes is proposed and tested -- The expected results are obtained