Examinando por Materia "Sistema de control"

Mostrando 1 - 3 de 3
  • Publicación
    Acceso abierto
    Algoritmo para la cancelación de realimentación acústica
    (2020) Murillo González, Cristian Danilo; Ugarte Macías, Juan Pablo
    An algorithm for the control of acoustic feedback functions as a control system whose main objective is to uncouple the closed-loop feedback of an electro-acoustic system, once it becomes unstable. This process of control over the electroacoustic path provides advantages, among which the optimization of time is emphasized when adjusting a monitoring system and preventing damage to the equipment used. In the present work the origin of the instability of the sound reinforcement systems is detailed and an algorithm is proposed for the correction of multiple feedbacks, developed under the principle of suppression of couplings with slot filter (SAFR), detecting peaks of spectral energy and applying a second-order notch IIR filter in the discriminated frequencies by means of the RPPL criterion (peak power limit ratio). Quantitative and qualitative audio signals were analyzed with people performing sound reinforcement works, this in order to detect signal degradations as changes in the total harmonic distortion of the signal and possible variations of the fundamental frequency, of the same In this way, the group delay generated by the filter is measured. The results showed that the algorithm for the control of acoustic feedback fulfills the objective in estimation and attenuation of spectral peaks, showing faults in the cancellation of low frequency because the bandwidth of the filter is not adaptable according to the frequency. The group delay generated by IIR filters in cascade is small and possible to implement up to order 33, for this reason the algorithm can be implemented in contexts of sound reinforcement. The result of the qualitative test evinced that the algorithm is inefficient when it is implemented in a signal adder, but it presents good performance when implemented in individual signals
  • Publicación
    Acceso abierto
    Automatización de los procesos auxiliares para la realización de las prácticas en el laboratorio de mecánica de fluidos
    (2015) Ramírez Vargas, John Fernando; Patiño, Juan Guillermo
    En el laboratorio de Mecánica de Fluidos se implementa una automatización de los procesos auxiliares soportado con un PLC en el cual se desarrollan algoritmos de control PID para controlar el caudal de salida en la motobomba principal. Mediante una serie de sensores ópticos, magnéticos y de caudal conectados al PLC se logra correr una aplicación de supervisión automática que controla elementos finales de control tales como variador, motobombas e indicadores luminosos. El sistema cuenta además con una HMI que permite la interacción entre el proceso y el usuario y además permite tomar datos de dicho proceso los cuales pueden ser extraídos posteriormente Tanto el software de control como el de supervisión tienen el objeto de soportar los procesos auxiliares de las prácticas, a fin de que en las experiencias los estudiantes puedan enfocar su atención en sus experimentos y prácticas de laboratorio y no el de toma de datos y control de variables.
  • Publicación
    Acceso abierto
    Prototipo de un sistema remoto de seguridad en el hogar
    (Universidad de San Buenaventura, 2017) Villegas Villada, Daniel; Roa Estrada, Richard Alexander; Sarria Navarro, Erika
    From the moment man began to make advances in the field of electronics, he has sought ways to improve his way of life both in comfort and safety. For this reason, more and more electronic systems are being developed that operate in workplaces and homes, among other places.The development of this document describes the design of a Remote Monitoring and Control System for Fire, Smoke and Gas Leaks, which allows a safer environment for residents of said dwelling and which consists of different sensors which will be supervising the Variables determined by the research carried out. By obtaining the data provided by the sensors, you can know if there is an imminent danger in the house, and if this is the case, preventive systems such as sprinklers, solenoid valves and extractors will be implemented to prevent further damage. In turn a text message will be sent to the cell phone of the registered user, informing him that danger has been generated in the house so that it communicates with the corresponding authorities