Papers by Edgar A Chacón Ramírez
Supervisory control design based on hybrid systems and fuzzy events detection. Application to an oxichlorination reactor
This paper presents a supervisory control scheme based on hybrid systems theory and fuzzy events ... more This paper presents a supervisory control scheme based on hybrid systems theory and fuzzy events detection. The fuzzy event detector is a linguistic model, which synthesizes complex relations between process variables and process events incorporating experts' knowledge about the process operation. This kind of detection allows the anticipation of appropriate control actions, which depend upon the selected membership functions used to characterize the process under scrutiny. The proposed supervisory control scheme was successfully implemented for an oxichlorination reactor in a vinyl monomer plant. This implementation has allowed improvement of reactor stability and reduction of raw material consumption.
Revista Ingenio, 2021
El estándar ISO 50001 para la gestión de la energía es bien conocido en el contexto de las Pequeñ... more El estándar ISO 50001 para la gestión de la energía es bien conocido en el contexto de las Pequeñas y Medianas Empresas, aunque su aplicación no es común. Por otra parte, ha aparecido en esta década un paradigma que es el de Industria 4.0 (I 4.0) donde la gestión eficiente de la energía es uno de los elementos centrales. Ambos conceptos son de gran importancia para la mejora de las PyMEs, pero estas no cuentan con las herramientas que permitan ir incorporando estos conceptos a su entorno. En el trabajo se muestra como se adquieren la información de los tres ejes del modelo Rami 4.0 mediante la incorporación de una herramienta para la gestión de energía que permitirá a los usuarios mejorar la eficiencia energética. Resultados de la aplicación del sistema son mostrados.
Agroalimentaria
La irrupción de las tecnologías de información en todas las actividades de la sociedad ha traído ... more La irrupción de las tecnologías de información en todas las actividades de la sociedad ha traído importantes mejoras en su desarrollo. La agricultura y la agroindustria han sido dos de los grandes beneficiarios de estos cambios, al mejorar la calidad de los datos obtenidos, el desarrollo de modelos para una agricultura más precisa, así como el manejo de la cadena de valor desde los proveedores hasta el consumidor final con base en la internet y otras herramientas digitales. No obstante, para alcanzarlos es necesario mejorar la formación de las personas involucradas y nuevos modos de gestión de los recursos y procesos productivos. El objetivo de este artículo es caracterizar y analizar la situación venezolana respecto al uso de estas tecnologías, para luego formular una propuesta de gestión de las mismas, con el fin último que estos beneficios lleguen a las distintas cadenas agroalimentarias de Venezuela. En estudios previos realizados por el equipo se verificó que –efectivamente– lo...
Revista Ingenio, 2020
El concepto de Industria 4.0 (I4.0) es muy reciente y su aplicación crea grandes expectativas, au... more El concepto de Industria 4.0 (I4.0) es muy reciente y su aplicación crea grandes expectativas, aunque no se ha podido medir su impacto de sus resultados. En Europa, EEUU, y países del extremo oriente las grandes empresas lideran su implantación conforme a estándares de automatización. Un caso distinto son las Pequeña y Medianas Empresas (PyMEs), las cuales confrontan problemas que van desde desconocimiento de la tecnología, estructuras empresariales rígidas, formación de recurso humano, falta de estándares lo que crea un gran riesgo para ellas en su incorporación o el riesgo de quedar fuera del cambio. En América Latina el reto es aún mayor, ya que las industrias están en desventaja por su falta de automatización, y más aún en las PyMEs para las cuales I4.0 representa un riesgo. En este trabajo se presenta un esquema de apoyo a la implantación de Industria 4.0, adaptada a la realidad de la industria Latino Americana que incluye una ruta de trabajo para las implantar I 4.0 en PyMEs.
Intelligent supervisory systems for industrial process control
WSEAS Transactions on …, 2005
Abstract:-This paper presents a supervisory control scheme based on the hybrid systems theory and... more Abstract:-This paper presents a supervisory control scheme based on the hybrid systems theory and fuzzy events detection approach presented in [1]. The fuzzy event detector is a linguistic model, which synthesizes complex relations between process variables and process ...
Service Orientation in Holonic and Multi-Agent Manufacturing, 2018
To satisfy the complex needs of a production process control, many architectures have been propos... more To satisfy the complex needs of a production process control, many architectures have been proposed which regularly can be classified into hierarchical (e.g. ISA 95 standard), heterarchical (e.g. multi-agent systems) and holonic or semiheterarchical, based on the holarchy notion (self-regulating holons organization with "smart" properties). A manufacturing system under the holonic approach (HMS) is considered part of the Intelligent Manufacturing Systems (IMS) implying that the HMS are defined as highly distributed organizations. The goal of these organizations is to decentralize manufacturing into individual entities called holons, which are autonomous, cooperative and intelligent. A. Koestler defines the concept of Holon as a self-similar or fractal, stable and coherent structure consisting of several holon-shaped sub-structures. Thus, no elements in the holarchy can self-develop without their subordinated parts or components. This characteristic ensures that HMS are stable structures that can resist disturbances. Applying this concept results in control processes that are generalized in terms of the next-generation manufacturing systems. The state of the art reveals that traditional manufacturing systems and HMS approaches are characterized by the Production Unit (PU). Examples of HMS proposed during the last decades with their strengths and weaknesses are summarized hereafter. Finally, the goal of this research is to analyze, design, and validate a holonic PU (HPU) model of intelligent control based on HMS. Primary results show an implementation of a decentralized industrial automation. There are given HPU information models in order to establish a control architecture for manufacturing systems to support real-time plant operation.
There is a conflict in Discrete Event System (SED) when two or more processes are ready to perfor... more There is a conflict in Discrete Event System (SED) when two or more processes are ready to perform different actions that directly depend on the use of a shared resource, which could produce a stalemate. This article contains material Petri Nets and sets some characterizations for the analysis of a class of SED. The most striking results establish, under certain conditions, the relationship between the absence of conflict and the independence of the occurrence of events. More precisely, established from a theoretical point of view some characterizations structures under free choice, free choice, safe and not blocked.
Evaluation de l'application du paradigme holonique à un système de réservoirs
Journal Européen des Systèmes Automatisés, 2016
National audienc
Ingenius, 2016
El integrar sistemas en la industria cementera es un requerimiento inminente, para lograrlo es ne... more El integrar sistemas en la industria cementera es un requerimiento inminente, para lograrlo es necesario disponer de las herramientas metodológicas idóneas. El objetivo del artículo se orienta a proponer un marco metodológico que involucre aspectos técnicos, modelado de procesos de producción e integración con el resto de procesos del negocio. Se hace uso del paradigma holónico para modelar los procesos de producción mediante sus actividades y un conjunto de herramientas para la generación del esquema de integración el mismo que está basado en el holón Unidad de Producción. La viabilidad de las actividades es analizada en tres aspectos: física, logística y económica; la física es evaluada mediante los modelos de productos y proceso; la logística mediante la disponibilidad de los recursos suministrados por las aplicaciones que manejan recursos necesarios para una actividad y el modelo proceso producto; la económica mediante el uso del ABC (Activity Based Costs), lo que permite establ...
Journal of Intelligent Manufacturing, 2021
Industry 4.0 (I4.0) brings together new disruptive technologies, increasing future factories’ pro... more Industry 4.0 (I4.0) brings together new disruptive technologies, increasing future factories’ productivity. Indeed, the control of production processes is fast becoming a key driver for manufacturing operations. Manufacturing control systems have recently been developed for distributed or semi-heterarchical architectures, e.g., holonic systems improving global efficiency and manufacturing operations’ reactiveness. So far, previous studies and applications have not dealt with continuous production processes, such as applications for Water Supply System (WSS), oil refining, or electric power plants. The complexity of continuous production is that a single fault can degrade extensively and even cause service disruption. Therefore, this paper proposes the Holonic Production Unit (HPU) architecture as a solution to control continuous production processes. An HPU is created as a holon unit depicting resources in a continuous process. This unit can detect events within the environment, eva...
Comportamiento Aut�nomo del Hol�n Recurso basado en la Agenda de Producci�n
Intelligent supervisory control designs framework for fault exposed processes
WSEAS, International Journal of …, 2007
Page 1. Abstract The relevance of timely detecting faults in an industrial process has motive ou... more Page 1. Abstract The relevance of timely detecting faults in an industrial process has motive our research work, which consists in designing a framework for intelligent supervisory control for industrial processes. In order to ...
This work is mainly aimed to design a supervisory control system for regulating, very precisely, ... more This work is mainly aimed to design a supervisory control system for regulating, very precisely, the output voltage for a boost converter, based on the model of a hybrid plant. The theory of sliding mode control is used to synthesize a controller for the continuous dynamics. Now, to solve both the problem of discontinuity as the problem of insensitivity to uncertainty in the load resistance of such converter had to design a hybrid output feedback controller to guarantee the output voltage to a desired value. Particularly an approximate entropy (ApEn) concept is used as an innovative method that could detect any event generated on the continuous time dynamics in the hybrid system. It was found that the hybrid plant supervisor provides good results in terms of robustness to disturbances, maintaining a good dynamic response.
Supervisory control design based on hybrid systems and fuzzy events detection. Application to an oxichlorination reactor
ISA Transactions, 2002
This paper presents a supervisory control scheme based on hybrid systems theory and fuzzy events ... more This paper presents a supervisory control scheme based on hybrid systems theory and fuzzy events detection. The fuzzy event detector is a linguistic model, which synthesizes complex relations between process variables and process events incorporating experts' knowledge about the process operation. This kind of detection allows the anticipation of appropriate control actions, which depend upon the selected membership functions used to characterize the process under scrutiny. The proposed supervisory control scheme was successfully implemented for an oxichlorination reactor in a vinyl monomer plant. This implementation has allowed improvement of reactor stability and reduction of raw material consumption.
Diseño De Sistemas De Control Supervisorio Basado en Sistemas Híbridos y Detección Difusa De Eventos
A Holonic Architecture for Continuous Processes Supervisión and Coordination
A Holonic Architecture for Continuous Processes. Supervision and Coordination. EDGAR CHACÓN R. De... more A Holonic Architecture for Continuous Processes. Supervision and Coordination. EDGAR CHACÓN R. Departamento de Computación. Facultad de Ingeniería. Universidad de Los Andes. Mérida-Estado Mérida. Venezuela. EDMARY J. ALTAMIRANDA M. ...
In th is paper , we propose an object-or iented design pat tern that can be used for model ing co... more In th is paper , we propose an object-or iented design pat tern that can be used for model ing cont inuous process appl icat ions . The pat tern is based on the not ion of organizat ional sys tems which considers a product ion system from a hol is t ic perspect ive. The pat tern in tegrates the decis ion making processes of the hierarchical s t ructure of an organizat ion with the control and physical processes that character ize a cont inuous product ion industry. I t provides the essent ia l object c lasses that are required in most cont inuous process appl icat ions , such as real t ime informat ion systems for manufactur ing and cont inuous process industr ies .
Asignación de objetivos de producción mediante un protocolo de negociación basado en contratos Pr... more Asignación de objetivos de producción mediante un protocolo de negociación basado en contratos Production objectives allocation through a negotiation protocol based on contracts Recibido para revisión 15 de Abril de 2009, aceptado 23 de Octubre de 2009, versión final 11de Diciembre de 2009 Resumen-Las órdenes de producción son fundamentalmente la View publication stats View publication stats
1 Publicado en las Actas de las IV Jornadas Panamericanas de Automatización. Caracas, Venezuela, ... more 1 Publicado en las Actas de las IV Jornadas Panamericanas de Automatización. Caracas, Venezuela, Mayo, 2000.
Proceedings of the American …, 2008
CITATION 1 READS 25 4 authors, including: Some of the authors of this publication are also workin... more CITATION 1 READS 25 4 authors, including: Some of the authors of this publication are also working on these related projects: Integration in production processes, based on holonic systems View project Experimental design of jerk circuits to understand and implement the control of chaos in nonlinear dynamic systems with chaotic behaviors View project Eliezer Colina Morles University of the Andes (Venezuela)
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Papers by Edgar A Chacón Ramírez