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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Arquitetura de controladores fuzzy em redes foundation fieldbus

Martins, Daniel Lopes 14 February 2011 (has links)
Made available in DSpace on 2014-12-17T14:55:49Z (GMT). No. of bitstreams: 1 DanielLM_DISSERT.pdf: 2854264 bytes, checksum: 7dab37a82a8722342102681fd9fbdda2 (MD5) Previous issue date: 2011-02-14 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / Foundation Fieldbus Industrial networks are the high standard technology which allows users to create complex control logic and totally decentralized. Although being so advanced, they still have some limitations imposed by their own technology. Attempting to solve one of these limitations, this paper describes how to design a Fuzzy controller in a Foundation Fieldbus network using their basic elements of programming, the functional blocks, so that the network remains fully independent of other devices other than the same instruments that constitute it. Moreover, in this work was developed a tool that aids this process of building the Fuzzy controller, setting the internal parameters of functional blocks and informing how many and which blocks should be used for a given structure. The biggest challenge in creating this controller is exactly the choice of blocks and how to arrange them in order to effectuate the same functions of a Fuzzy controller implemented in other kind of environment. The methodology adopted was to divide each one of the phases of a traditional Fuzzy controller and then create simple structures with the functional blocks to implement them. At the end of the work, the developed controller is compared with a Fuzzy controller implemented in a mathematical program that it has a proper tool for the development and implementation of Fuzzy controllers, obtaining comparatives graphics of performance between both / As redes industriais Foundation Fieldbus s?o redes com alto padr?o de tecnologia que permitem que usu?rios criem l?gicas de controle complexas e totalmente descentralizadas. Mesmo sendo t?o avan?adas, elas ainda possuem algumas limita??es impostas pela sua pr?pria tecnologia. Tentando solucionar uma destas limita??es, este trabalho descreve como estruturar um controlador Fuzzy dentro de uma rede Foundation Fieldbus utilizando seus elementos b?sicos de programa??o, os blocos funcionais, de forma que a rede continue sendo totalmente independente de qualquer outro dispositivo que n?o os pr?prios instrumentos que a constituem. Al?m disso, no decorrer do trabalho foi desenvolvida uma ferramenta que auxilia este processo de constru??o do controlador Fuzzy, configurando os par?metros internos aos blocos funcionais e informando quantos e quais blocos devem ser utilizados para determinada estrutura. O maior desafio em criar este controlador est? justamente na escolha dos blocos e em como arranj?-los de forma a efetuarem as mesmas fun??es de um controlador Fuzzy implementado em outro tipo de ambiente. A metodologia adotada foi dividir cada uma das fases de um controlador Fuzzy tradicional e ent?o criar estruturas simples com os blocos funcionais para implement?-las. Ao final do trabalho, o controlador desenvolvido ? comparado com um controlador Fuzzy implementado em uma programa matem?tico que possui uma ferramenta pr?pria para cria??o e execu??o de controladores Fuzzy, obtendo gr?ficos comparativos de desempenho entre ambos

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