Diseño de un sistema de control avanzado para regular la velocidad de una turbina de vapor acoplada a un generador DC Advanced controller design for speed control in a steam turbine coupled to DC generator Resumen− El artículo presenta la metodología para el diseño de dos estrategias de control, LQG (Linear Quadratic Gaussian Control) y DMPC (Discrete Time Model Predictive Control), para regular la velocidad de una turbina de vapor acoplada a un generador DC de excitación independiente. La dinámica del sistema es representada por un modelo lineal en el cual los parámetros del modelo se calculan a partir de un algoritmo de optimización. Las estrategias de control se implementan en el sistema de control distribuido (DCS), Delta V. El objetivo es mantener constante la velocidad ante variaciones de la presión en la tubería de vapor y modificación de la resistencia del bobinado de campo del generador DC.Palabras clave− Turbina de vapor, generador DC, control LQG, control DMPC.Abstract− The paper presents the methodology for the design of two control strategies, LQG (Linear-Quadratic-Gaussian Control) and DMPC (Discrete Time Model Predictive Control), for speed control in a steam turbine coupled to separately excited DC generator. The dynamics of the system is represented by a linear model in which the model parameters are calculated using an optimization algorithm. The control strategies were implemented on a distributed control system (DCS), Delta V. The goal is to maintain the speed constant despite the variation of pressure in the steam pipeline and changes in the field resistance of the DC generator.
Resumen-La ventilación mecánica (VM) es una estrategia terapéutica que consiste en asistir o reemplazar mecánicamente la ventilación pulmonar espontánea. Con el objetivo de desarrollar un software de apoyo para los médicos, se realizó un estudio de las señales respiratorias, utilizando la transformada de wavelet discreta, para determinar los descriptores que indiquen si el paciente puede ser desconectado del ventilador mecánico. Para reducir la dimensionalidad del sistema se realizó un análisis de componentes principales (PCA), determinando tres variables óptimas, las cuales son las entradas a los clasificadores que se analizaron en el artículo: K-Nearest Neighbor y lógica difusa.Palabras clave-Análisis de componentes principales, clasificador K-Nearest Neighbor, clasificador lógica difusa, transformada wavelet, ventilación mecánica.Abstract-The mechanical ventilation (MV) is a therapeutic strategy to mechanically assist or replace spontaneous breathing. With the objective of developing a software support for doctors was performed a study of respiratory signals using the discrete wavelet transform to determine the descriptors to indicate whether the patient can be disconnected from the mechanical ventilator. To reduce the dimensionality of the system was performed a principal component analysis (PCA), establishing three variables optimal, which are the inputs to the classifiers that were analyzed in the article: K-Nearest Neighbor and fuzzy logic.
CC BY-ND 4.0 H. González-Acevedo, O. Villamizar-Galvis, "Implementación de un sistema de control para regular la velocidad y posición de motores industriales utilizando el protocolo de comunicación OPC," Rev.
This paper presents the mechanical design of a single axis solar tracking system, as well as the electronic design of a system that to record in real time the electric power delivered by the solar tracker and to evaluate its performance. The interface was developed in Labview and it compares the power supplied by the tracker with the power supplied by static solar panel of the same characteristics. The performance is initially simulated using Pv-Syst software, and later validated with the data obtained by the interface. As a result, the use of the solar tracker increases the power delivered by a minimum of 19%, and it can go as high as 47.84%, with an average in increase in power of 19.5% in the monthly energy production. This experimental result was compared with the simulation by Pv-Syst software and shows a difference of only 2.5%, thus validating the reliability of the simulation. This behavior pattern coincides with previous studies carried out for equatorial latitudes.
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