Examinando por Materia "Control"

Mostrando 1 - 14 de 14
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    Adaptive LAMDA applied to identify and regulate a process with variable dead time
    (Institute of Electrical and Electronics Engineers Inc., 2020-01-01) Morales L.; Pozo D.; Aguilar J.; Rosales A.; Universidad EAFIT. Departamento de Ingeniería de Sistemas; I+D+I en Tecnologías de la Información y las Comunicaciones
    In this paper, an adaptive intelligent controller based on the fuzzy algorithm called LAMDA (Learning Algorithm for Multivariable Data Analysis) is presented in order to identify and regulate a process with variable dead time. The original algorithm has been used for supervised and unsupervised learning, whose main field of application is the identification of functional states of the systems. In this work a modification of LAMDA has been implemented which is capable of online learning using hybrid techniques. The proposal consists of two stages: training stage to learn about the unknown plant in order to establish initial parameters to the controller, and a second phase, called application, in which the control strategy is updated using online learning. The proposed method is tested in the control objective of regulation of a process with variable dead time, to analyze the viability of its utilization in these types of systems in which their dynamics are variable and unknown. © 2020 IEEE.
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    Caracterización de la epidemiología de Moniliophthora roreri, hongo fitopatógeno del cacao
    (Universidad EAFIT, 2021) Jiménez Zapata, Diana Lorena; Mosquera López, Sandra; Correa Álvarez, Javier
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    Cómo crear un ambiente de control en las organizaciones
    (Universidad EAFIT, 2003) Mejía Quijano, Rubi Consuelo; Universidad EAFIT
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    Control organizacional: ¿sistema o agregado de elementos?
    (Universidad EAFIT, 01/12/2007) María Rocío Arango Restrepo; Universidad EAFIT
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    Control para sistemas continuos y discretos basado en la ingeniería dirigida por modelos
    (Universidad EAFIT, 2020) Erazo Ramos, Andrés Felipe; Vallejo Correa, Paola Andrea
    The control has been a fundamental factor for the development of the technology, whenever a physical variable needs to be adjusted to a specific value, a control action is being performed. Control can be found in everyday life in activities like adjusting the temperature of the shower or adjusting the brightness in a greenhouse. In general terms, a control system is a component of a more complex system in which it is required to produce a certain output or maintain a specific system state Systems that require a feedback control process are becoming increasingly complex, which carries with it great challenges. This research aims to propose a simple model-driven engineering approach, for the control of continuous systems and discrete-event systems, which includes the implementation of the proposal on the VariaMos platform and its application in two proof of concept. The implementation allows in an experimental way, to obtain the analytical model of the system and the gains of the PID controller. The results obtained show how approach can be used in systems with continuous and discrete events. Therefore, it is concluded that the proposed approach allows producing systems with feedback capabilities. Furthermore, the implementation of the approach allows it to be used by users who are not necessarily experts in control.
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    Design and usability evaluation of a multi-input interface in an idTV environment
    (Springer Verlag, 2017-01-01) Téllez J.F.; Montoya J.C.; Trefftz H.; Universidad EAFIT. Departamento de Ingeniería de Sistemas; I+D+I en Tecnologías de la Información y las Comunicaciones
    In recent years, and considering the rise of Interactive Digital Television (idTV), it has been great interest in the design of applications and services for this platform. However, the success of these applications largely depends on the ease of use and how users interact with them. For this reason, we have explored different interfaces and modes of interaction to improve the user experience with these applications in comparison with the traditional Remote-Control (RC). This article presents an interaction with idTV applications using multiple input control interfaces with different modes of interaction such as touch buttons, gesture recognition, voice recognition, and recognition of movements. These modes of interaction were validated through usability testing using a model of quasi-experimental evaluation of three dimensions, where each dimension represents respectively: users, tasks and control interfaces. As a result of the qualitative and quantitative assessments, we performed an analysis of possible improvements in the usability of a particular application of idTV. The results showed few differences between one multi-input control interface and one RC in tasks the user was familiar with, on the opposite, significant differences were found in performing tasks involving greater user interaction, such as the text input or navigation between menus. © Springer International Publishing AG 2017.
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    Gobierno abierto : un nuevo paradigma de gobernanza pública : una descripción desde el caso colombiano
    (Universidad EAFIT, 2019) Castillo Restrepo, Liliana María; Buchely Ibarra, Lina Fernanda
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    Implementación del sistema de planeación y control Last Planner en el tramo 2B del corredor parcial de Envigado para mejorar la confiabilidad y reducir la incertidumbre en la construcción
    (Universidad EAFIT, 2014) Castaño Jiménez, Patricia; Botero Botero, Luis Fernando
    Desde su creación en 2000, El Last Planner System (LPS) ha sido implementado con éxito en el ámbito nacional e internacional, aumentando la confiabilidad y reduciendo la variabilidad en la construcción, lo cual es evidenciado en la literatura académica y en informes de gestión -- En Colombia la aplicación de este sistema se ha concentrado en proyectos de edificación, existiendo poca evidencia en el área de infraestructura que se constituye en un sector clave para el desarrollo, la apertura económica y la competitividad de los países, al que Colombia le apuesta en forma decidida en sus políticas de planeación y desarrollo, y que requiere de mecanismos, sistemas y/o metodologías que mejoren la confiabilidad en la planificación con resultados que impacten la ejecución de los proyectos con la optimización de tiempos y recursos -- Como respuesta a ese gran reto en donde la eficiencia se vuelve premisa, esta investigación se centra en la implementación del LPS en una obra de infraestructura, con características y externalidades que exigen la consideración de variables poco convencionales en el análisis de restricciones y que además impactan los resultados que terminan siendo condicionados y afectados por factores externos que pese a la efectividad del sistema de planificación resultan imposibles de controlar -- Este trabajo se constituye en un aporte a la academia y al sector de la construcción en Colombia, que históricamente ha tenido una participación significativa dentro del PIB de la nación siendo eje dinamizador de la economía, la generación de empleo y el mejoramiento de la calidad de vida
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    Influence of pulse-type inputs on parameter estimation and chemical control assessment in a dengue deterministic model
    (Universidad EAFIT, 2019) Cataño López, Alexandra; Vélez Sánchez, Carlos Mario; Rojas Díaz, Daniel
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    Low-cost proportional automatic control valve
    (Universidad Eafit, 2020) Arboleda Otero, Mariana; Builes Toro, Santiago
    Control and automation are the keys to escalate to industry 3.0, in a process the control valves are responsible for performing a corrective action in the process stream against a set point in the PID control loop, unfortunately its high cost does not allow the implementation of these equipment in academia and small industries. This project was based on the development of a functional prototype in hardware and software of a proportional valve for low-cost automatic control, coupling a conventional valve found in the market configured with microcontrollers, obtaining a low-cost device compared to those existing in the market that satisfy similar needs. The project was divided into four stages: i) mechanical coupling of the valve and the stepper motor, ii) electrical connection of the motor with the Arduino microcontroller, iii) programming the code to control the percentage of valve opening in direct relation with the number of steps of the motor, iv) transcription of the programming code to the Raspberry microcontroller to control the valve with the cell phone. A functional prototype with rapid response capacity was made and five buttons were set for the opening percentage of 0, 25, 50, 75, 100 %. In addition to this, it was possible to build a valve cell interface with a Raspberry microcontroller run through Google's mobile app, Home Assistant, to remotely control the valve.
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    Modelo para el otorgamiento, seguimiento y control de crédito de los clientes
    (Universidad EAFIT, 2020) Sanabria Velásquez, María del Pilar; Ospina Mejía, Jaime Alberto
    The following work has the purpose of proposing a model for the granting, monitoring and control of Clients' credit quotas based on the information of the financial statements such as the Balance Sheet and the financial statement of Loss and Gain of the clients object of study of the years 2015, 2016, 2017 and 2018, the following indicators will be analyzed; Working Capital/Total Assets, Retained Earnings/Total Assets, Operating Profit/Total Assets, Total Equity/Total Liabilities, Net Sales/Total Assets, these indicators are fundamental to be able to apply the Altman Z Score model. This is a simple analysis technique that indicates the probability of bankruptcy that customers may have, for this purpose, ten medium-sized customers of the company will be taken as a sample and will indicate how viable it will be to grant and / or monitor credit quotas. The sector and some qualitative variables can improve or impair the rating and these are not taken into account in the company. Also for times of recession or economic expansion it is important to give more weight to the results of the last year.
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    Reconversión del sistema de control de un torno basado en control numérico
    (Universidad EAFIT, 2011) Ruiz Gil, Alejandro Antonio; Flórez Escobar, Jaime Andrés
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    ¿Y dónde está el control? una experiencia pedagógica
    (Universidad EAFIT, 1999) Mejía, Rubi; Universidad EAFIT