Examinando por Autor "Velásquez-López A."
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Ítem Battery State of Charge Estimation Error Comparison Across Different OCV-SOC Curve Approximating Methods(Springer Verlag, 2019-01-01) Sanín R.; Fernández-Montoya M.; Garzón-Vargas M.A.; Velásquez-López A.Accurate estimation of Rechargeable Batteries Parameters, such as State Of Charge (SOC), contributes to their safety and reliable operation in a wide variety of applications (e.g. automotive, stationary energy storage, medical equipment, among others). Due to variations in environmental and load conditions, battery cells and their instrumentation devices can experience deviations from their standard operation values, leading to an imprecise measurement of State Of Charge (SOC) indicator variables. Then, SOC estimation models are required. These estimations developed through analytical models consider intrinsic battery chemistry variables and operation cycle conditions are taken from charge and discharge testing; where hysteresis phenomena, measurement, and theoretical adjustment errors can be identified over Open Circuit Voltage (OCV)-SOC curves. This study compares the model adjustment errors of several estimation methods, taken from literature to approximate the OCV-SOC curves of a rechargeable battery pack. © 2019, Springer Nature Switzerland AG.Ítem Design of a photovoltaic charging station (PVCS) by implementing the VDI 2206(Institution of Engineering and Technology, 2018-01-01) Sanín R.; Velásquez-López A.This article presents, through the design of a Photovoltaic Charging Station (PVCS), considerations regarding the use of the guideline VDI 2206 in the design of Mechatronic systems. A discussion is also established on the different gaps that the guide has in terms of methodological recommendations so that the different technology domains can contribute to the conceptualization of the product and the definition of the product architecture. © 2018 Institution of Engineering and Technology. All rights reserved.Ítem Development of a tongue machine interface for quadriplegic patients(DESIGN SOC, 2017-01-01) Velásquez-López A.; Velásquez-Rendón D.; Amaya-Quiroz J.S.; Jimenez-Franco L.D.; Trefftz H.This article presents the development and validation of a wheelchair mobility solution. The solution is based on a Tongue Machine Interface (TMI) involving the use of Force Sensing Resistors (FSRs). The semantics and functionality of the development are compared with two other interfaces: a Joystick and a Brain Computer Interface (BCI) implemented on the same wheelchair. Each development is described from the electric, mechanic and informatic domains. Surveys and user's tests were performed in order to explore which technology had a more positive impact on the mobility of quadriplegic persons in terms of effectiveness, better ergonomics, lower costs and better functionality. The quantitative and qualitative results are described and analyzed.Ítem Development of a tongue machine interface for quadriplegic patients(DESIGN SOC, 2017-01-01) Velásquez-López A.; Velásquez-Rendón D.; Amaya-Quiroz J.S.; Jimenez-Franco L.D.; Trefftz H.; Universidad EAFIT. Departamento de Ingeniería de Sistemas; I+D+I en Tecnologías de la Información y las ComunicacionesThis article presents the development and validation of a wheelchair mobility solution. The solution is based on a Tongue Machine Interface (TMI) involving the use of Force Sensing Resistors (FSRs). The semantics and functionality of the development are compared with two other interfaces: a Joystick and a Brain Computer Interface (BCI) implemented on the same wheelchair. Each development is described from the electric, mechanic and informatic domains. Surveys and user's tests were performed in order to explore which technology had a more positive impact on the mobility of quadriplegic persons in terms of effectiveness, better ergonomics, lower costs and better functionality. The quantitative and qualitative results are described and analyzed.