Visualitza Departament: Enginyeria de Sistemes Industrials i Disseny per autoria "9db14221-df9d-4d5c-bb65-019bd37ac8a6"
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Adaptación de la docencia por Covid-19: experiencia en la ingeniería automática
Universidade da Coruña, Servizo de Publicacións (2021)En este trabajo se describe y analiza la experiencia docente relativa al curso 2020-2021 en la asignatura Sistemas Automáticos. Debido a los efectos de la pandemia, se ha tenido que adaptar la docencia al no disponer de ... -
Asymmetric delayed relay feedback identification based on the n-shifting approach
Taylor and Francis (2021-08-20)The paper presents an improvement of the n-shifting technique to identify the frequency response of an industrial process using a fully asymmetric and delaying relay. The n-shifting approach allows the calculation of n + 1 ...
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Auto-tuning method for PI controllers under Symmetric-Send-on-Delta sampling strategy
Elsevier (2024-06-27)In this work, an auto-tuning method for PI controllers applied in a loop under a Symmetric-Send-On-Delta sampling strategy is proposed. Auto-tuning algorithms usually implement an identification phase to obtain some ...
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Characterization of Limit Cycle Oscillations Induced by Fixed Threshold Samplers
IEEE (2022-06-13)In this work, a generalized study of the conditions for the appearance of limit cycle oscillations induced by any kind of sampler with multilevel fixed thresholds is presented. These kinds of samplers, which will be referred ...
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Design of modular and distributable automation software for PLCs
SCITEPRESS – Science and Technology Publications (2023-11)Design and maintainability of modular automation software are common concerns nowadays. Common practice in industry usually overlooks the design phase of software, jumping directly into the coding phase, which typically ...
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Distributed implementation of Grafcets through IEC 61499
IEEE (2020)A Grafcet is a standardized model for describing the behavior of systems which is popular among automation engineers. As the Grafcet standard excludes implementation details, the models are typically translated to ...
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Event-based discrete PI controllers robustness analysis through sampled describing function technique
Taylor and Francis (2021-08-09)In this work, the robustness of discrete PI controllers when used with a Symmetric-Send-On-Delta (SSOD) sampling law is addressed. Hitherto, the continuous Describing Function has been employed as a suitable tool to evaluate ...
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Experimental tuning of PI controllers with symmetric send-on-delta sampling from the step response
Taylor & Francis (2024-01-02)This paper proposes a technique for tuning PI controllers with symmetric send-on-delta (SSOD) sampling,using three measurements taken from the step response. The tuning procedure is based on a previouslypublished experimental ... -
Generación extrínseca de eventos para el control de sistemas continuos
Área de Ingeniería de Sistemas y Automática, Universidad de Extremadura (2018-08-05)En este artículo se propone el diseño de un circuito electrónico para la generación de eventos por cruce de niveles de una señal analógica. Este tipo de circuito puede ser útil en la implementación de controladores basados ...
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Implementation and evaluation of event-based PID in the IEC-61499 standard
IEEE (2018-08-04)This paper presents a study about the performance of event-based PID controllers implemented in the standard IEC-61499. The implementation details are addressed and experimental results are given. The main goal is to ...
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Improving the identification from relay feedback experiments
Elsevier (2022-01)This paper proposes a new method for systems identification from relay feedback test. As a difference with most of the existing methods, which are based on the describing function technique, our proposal considers a more ...
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Integración de Factory IO y 4DIAC-FORTE para la validación de software de control en la norma IEC 61499
Servizo de Publicacións. Universidade da Coruña (2022)En este trabajo se presenta la integración de 4diac-FORTE y Factory IO mediante OPC-UA. Dicha integración permite verificar software de control desarrollado según la norma IEC 61499 y de esta forma validar de metodologías ...
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Mejora de la estrategia de muestreo en bucles de control PID basados en eventos
Área de Ingeniería de Sistemas y Automática, Universidad de Extremadura (2018-08-05)En este artículo se presenta un estudio sobre el efecto en la robustez y en la generación de eventos de los diferentes métodos de muestreo empleados en el control basado en eventos, a saber, el muestreo por cuantificación ...
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Modelos de Grafcet y aplicaciones distribuidas en la norma IEC 61499. Un caso de estudio
Servizo de Publicacións da Universidade da Coruña, A Coruña (2021)En este trabajo se presenta un caso de estudio en el que se diseña una aplicación mediante distintos modelos en Grafcet los cuales van a ser implementados según el estándar para el diseño de aplicaciones distribuidas IEC ...
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Multiple frequency response points identification through single asymmetric relay feedback experiment
Elsevier (2023-01)In this paper a methodology to identify several points of the frequency response of a system using a single experiment is proposed. The identification is performed using the information obtained from an asymmetric relay ...
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On-line retuning of PID controllers with fixed threshold samplers
Elsevier (2023-04-11)The appearance of limit cycle oscillations in control systems with fixed threshold based samplers degrades the performance of the control loop, accelerates the wear out of actuators, and introduces an unnecessary communication ...
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Regular quantisation with hysteresis: a new sampling strategy for event-based PID control systems
IEEE (2020-10-01)In this study, a new sampling strategy for networked control systems, called regular quantification with hysteresis (RQH), is proposed. This alternative presents some benefits with respect to symmetric-send-on-delta sampling, ...
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Resintonización dinámica de controladores SSOD-PI para evitar ciclos límite causados por perturbaciones tipo rampa
Servizo de Publicacións. Universidade da Coruña (2022)Uno de los principales fenómenos a evitar en los sistemas con muestreo por umbrales fijos es la aparición de ciclos límite. Existe bibliografía sobre cómo evitarlos usando técnicas clásicas de análisis, sin embargo, dichos ...
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Robustness of event-based discrete PI controllers. A sampled describing function approach
Elsevier (2021-04-14)In this paper we present a study about the robustness of event-based discrete PI controllers.Our approach is based on Sampled Describing Function technique, which has been used tocharacterize the non-linear effect of the ...
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Software para el diseño de controladores PID basados en eventos por cruce de umbrales fijos
(2021-12-07)Los algoritmos de control PID basados en eventos tratan de aprovechar las conocidas ventajas del control PID a la vez que reducen el tráfico por las redes de comunicaciones que conectan las distintas unidades de hardware ...
