Fuzzy System And Power System
Mostrando 25-36 de 38 artigos, teses e dissertações.
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25. Controlador supervisório inteligente para sistemas híbridos eólico-diesel-bateria de pequeno porte. / An intelligent supervisory controller for wind-diesel-battery systems.
This work presents the development and simulation results of an Intelligent Supervisory Controller for hybrid power systems. The controller uses artificial intelligence techniques, based on artificial neural networks and neuro-fuzzy logic, to forecast both wind power and load, and to take optimal dispatch decisions for hybrid power systems. The main controll
Publicado em: 2007
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26. A AvaliaÃÃo da Aprendizagem: aplicaÃÃo de um Modelo Fuzzy para se obter notas mais justas na disciplina de LÃngua Portuguesa. / The Learning Assessment: the application of fuzzy model to obtain fair grades in Portuguese.
This study involves one of the most important themes in the educational field: the learning assessment. From everything that is discussed about it, there is something that is always in evidence: the qualitative proposal that is recommended to the assessment process. So, the aim of this study was to comprehend its meaning from the vision of the elementary sch
Publicado em: 2007
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27. Implementação e simulação de algoritmos de escalonamento para sistemas de elevadores usando arquiteturas reconfiguráveis.
This work proposes an elevator system that allows the vertical transport of passengers in a efficient way. This approach is based on the implementation of dispatching algorithms using Reconfigurable Architectures. A fuzzy logic method was proposed in order to identify traffic patterns in the building and schedule the elevators, which was carried out by imple
Publicado em: 2006
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28. CONTROLADOR NEBULOSO PARA MOTOR DE IGNIÇÃO POR COMPRESSÃO OPERANDO COM GÁS NATURAL E ÓLEO DIESEL
A foreseeable shortage of petroleum, associated to a growing ecological conscience, demand for alternative sources of energy and more efficient and less pollutant combustion processes. Among the few pollutant fuels this work approaches the combination of natural gas, whose consumption has been increasing year to year, and diesel. It is known that the interna
Publicado em: 2006
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29. Previsão de carga de curto prazo usando ensembles de previsores selecionados e evoluidos por algoritmos geneticos / Short-term load forecasting using esembles of selected and evolved predictors by genetic algorithms
This work proposes a methodology for short-term electric power load forecasting. This methodology is being widely used under the context of time series prediction and pattern recognition. It was named "ensembles" by the authors who developed it. This name carries the meaning of an assemblage of parts considered as forming a whole. Therefore, this name expres
Publicado em: 2006
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30. DEVELOPMENT OF AN ARTIFICIAL NEURAL NETWORK FOR MONITORING AND DIAGNOSIS OF SENSOR FAULT AND DETECTION IN THE IEA-R1 RESEARCH REACTOR AT IPEN / "Utilização de redes neurais artificiais na monitoração e detecção de falhas em sensores do Reator IEA-R1"
The increasing demand on quality in production processes has encouraged the development of several studies on Monitoring and Diagnosis Systems in industrial plant, where the interruption of the production due to some unexpected change can bring risk to the operators security besides provoking economic losses, increasing the costs to repair some damaged equ
Publicado em: 2006
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31. Computational methodology to evaluate the quality of power systems restoration plans / Metodologia computacional para avaliação da qualidade de planos de recomposição de sistemas de energia eletrica
A successful restoration depends on the quality of the restoration plans, that describe the sequence of control actions that must be executed to reenergize different areas (of the power system) just after total or partial blackouts. This work proposes a methodology to automatically evalute the quality of power system restoration plans, related to (a) the fle
Publicado em: 2005
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32. Desenvolvimento e analise de estrategias de controle colaborativo para cadeiras de rodas / Development analyses of collaborative control strategies for wheelchair
The aim of this dissertation is to develop control strategies for servo-assisted motorization. The system brings the power wheelchair advantages because it increases the accessibility and mobility, but it also brings manual wheelchair advantage that is the opportunity to increase the muscular and cardiovascular capacity. Thus the servo assisted wheelchair is
Publicado em: 2005
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33. Classificador de qualidade de álcool combustível e poder calorífico de gás GLP. / Alcohol combustible quality and LPG gas calorific power classifier.
This work shows the results of a robust system development as an alternative to recognize the quality of an alcohol fuel vapor sample and Liquid Petrol Gas (LPG) heat power in an electric nose. Two experimental methodologies were implemented to extract the features of alcohol fuel vapor and LPG gas patterns. The first approach to process the data used an Fuz
Publicado em: 2004
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34. OPTIMUM PRICE BIDDING STRATEGY IN THE SHORT-TERM MARKET OF HYDRO-DOMINATED ELECTRIC SYSTEMS / ESTRATÉGIA ÓTIMA DE OFERTA DE PREÇOS NO MERCADO DE CURTO PRAZO EM SISTEMAS COM PREDOMINÂNCIA HIDRELÉTRICA
In perfectly competitive markets, there are no loopholes that can be exploited by agents to maximize profit through non-competitive behavior. However, electricity markets look more like an oligopoly than perfectly competitive markets. If competition is not perfect, generation agents may try to establish optimum price bidding strategies to maximize profits. I
Publicado em: 2003
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35. UM SISTEMA DE DIAGNÓSTICO DE EQUIPAMENTOS ELÉTRICOS DE ALTA TENSÃO COM BASE NA OCORRÊNCIA DE DESCARGAS PARCIAIS / A DIAGNOSTICS SYSTEM OF HIGH VOLTAGE POWER APPARATUS BASED IN PARTIAL DISCHARGES OCURRENCE
High voltage (HV) power apparatus are fundamental parts in the industrial process. It is also well Known that electrical insulation systems are the parts that present more problems through the life cycle of an HV apparatus. The dielectric properties of materials are altered during operation time and for this reason they should be monitored. Among the main an
Publicado em: 2001
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36. Evaluation of the quality of wooden plates through a fuzzy inference system based in adaptative networks. / Avaliação da qualidade de placas de madeira através de um sistema de interferência nebuloso baseado em redes adaptativas.
Automatic visual inspection is an important task for industrial productivity. It could be applied for quality control or for replacing manual work under dangerous or repetitive activity. The classification stage in quality control of the industrial production is often based on the human knowledge. It seems, therefore, to be a great concern to supply an autom
Publicado em: 1999