Visualitza ESID_Articles per autoria "26fd6ff5-9dde-470c-b2ba-a18a516c3593"
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A new approach to averaging level control
Sanchis LLopis, Roberto; Romero Pérez, Julio Ariel; Martín Algarra, José María Elsevier (2011-09)In this paper, a new simple algorithm for averaging level control is presented. The proposed algorithm is based on the use of a static nonlinear controller to improve the input flow filtering by reducing the slope of the ... -
A new method for tuning PI controllers with symmetric send-on-delta sampling strategy
Romero Pérez, Julio Ariel; Sanchis LLopis, Roberto Elsevier (2016)In this paper we present a new method for tuning PI controllers with symmetric send-on-delta (SSOD) sampling strategy. First we analyze the conditions that produce oscillations in event based systems considering SSOD ... -
A new methodology for facilitating the design of safety-related parts of control systems in machines according to ISO 13849:2006 standard
Porras Vázquez, Alberto; Romero Pérez, Julio Ariel Elsevier (2018)Safety is a fundamental requirement of production systems considered throughout all the stages of a machine’s lifecycle. Due to its importance to avoid accidents and injuries, safety specifications have been explicitly ... -
A simplified black-box model oriented to chilled water temperature control in a variable speed vapour compression system
Romero Pérez, Julio Ariel; Navarro-Esbrí, Joaquín; Belman, Juan Elsevier (2011-02)The aim of this work is to propose a black-box model to accurately predict the chilled water temperature dynamic response of a vapour compression chiller. The model is oriented to be of value in determining an adequate ... -
Asymmetric delayed relay feedback identification based on the n-shifting approach
Sánchez-Moreno, José; Dormido, Sebastian; Miguel-Escrig, Oscar; Romero Pérez, Julio Ariel 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 ... -
Auto-tuning method for PI controllers under Symmetric-Send-on-Delta sampling strategy
Romero Pérez, Julio Ariel; Miguel-Escrig, Oscar 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 ... -
Benchmark para la Evaluación de Algoritmos de Auto-ajuste de Controladores PID
Romero Pérez, Julio Ariel; Sanchis LLopis, Roberto Comité Español de Automática (2011)En este artículo se propone una metodología para la evaluación de algoritmos de auto-ajuste de controladores PID. Para ello se definen índices cuantitativos que permiten medir el comportamiento de los algoritmos, tanto ... -
Characterization of Limit Cycle Oscillations Induced by Fixed Threshold Samplers
Miguel-Escrig, Oscar; Romero Pérez, Julio Ariel; Sánchez-Moreno, José; Dormido, Sebastian 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 ... -
Co-design of H∞ jump observers for event-based measurements over networks
Peñarrocha-Alós, Ignacio; Dolz Algaba, Daniel; Romero Pérez, Julio Ariel; Sanchis LLopis, Roberto Taylor & Francis (2015-07-27)This work presents a strategy to minimise the network usage and the energy consumption of wireless battery-powered sensors in the observer problem over networks. The sensor nodes implement a periodic send-on-delta approach, ... -
Design and implementation of a function block-based holonic control architecture for a new generation flexible manufacturing system
Querol, Esteban; Romero Subirón, Fernando; Estruch Ivars, Antonio; Serrano Mira, Julio; Romero Pérez, Julio Ariel Inderscience Enterprises (2017-05)In this research work a control architecture which gives response to the requirements of new generation of flexible manufacturing systems in terms of flexibility, reconfigurability, robustness and autonomy is designed ... -
Estudio comparativo de algoritmos de auto-ajuste de controladores PID. Resultados del Benchmark 2010-2011 del Grupo de Ingeniería de Control de CEA
Romero Pérez, Julio Ariel; Balaguer, Pedro; Arrieta Orozco, Orlando; Reynoso Meza, G.; García-Nieto, Simeón Elservier (2012)En este art ́ıculo se comparan tres me ́todos de auto-ajuste de controladores PID que consideran diferentes tipos de experimentos para obtener informacio ́n de la dina ́mica del proceso y distintos me ́todos de ca ́lculo ... -
Event-based discrete PI controllers robustness analysis through sampled describing function technique
Miguel-Escrig, Oscar; Romero Pérez, Julio Ariel 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 ... -
Experimental tuning of PI controllers with symmetric send-on-delta sampling from the step response
Sanchis LLopis, Roberto; Miguel-Escrig, Oscar; Romero Pérez, Julio Ariel 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 ... -
Improved efficiency in sensitivity calculations for bioreactor models
Romero Pérez, Julio Ariel; Navarro, José Luis Elsevier (2009)Sensitivity functions are a basic tool in the parametric identification of models. They can be used to obtain the gradient needed by optimization algorithms in the estimation of parameters and to calculate the Fisher ... -
Improving the identification from relay feedback experiments
Miguel-Escrig, Oscar; Romero Pérez, Julio Ariel 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 ... -
Multiple frequency response points identification through single asymmetric relay feedback experiment
Miguel-Escrig, Oscar; Romero Pérez, Julio Ariel; Sánchez-Moreno, José; Dormido, Sebastian 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 ... -
On-line retuning of PID controllers with fixed threshold samplers
Miguel-Escrig, Oscar; Romero Pérez, Julio Ariel; Sánchez-Moreno, José; Dormido, Sebastian 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 ... -
PI and PID auto-tuning procedure based on simplified single parameter optimization
Romero Pérez, Julio Ariel; Sanchis LLopis, Roberto; Balaguer, Pedro Elsevier (2011)In this paper a new auto-tuning algorithm for PI and PID controllers based on relay experiments is proposed to minimize the load disturbance integral error (IE) by maximizing the integral gain, subject to a desired phase ... -
Regular quantisation with hysteresis: a new sampling strategy for event-based PID control systems
Miguel-Escrig, Oscar; Romero Pérez, Julio Ariel 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, ... -
Software para el diseño de controladores PID basados en eventos por cruce de umbrales fijos
Romero Pérez, Julio Ariel; Miguel-Escrig, Oscar (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 ...