Controller Pi
Mostrando 25-36 de 39 artigos, teses e dissertações.
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25. AnÃlise do desempenho de sistemas de controle
When the controllerâs performance is reduced along the time and the control efficiency is no longer satisfactory, then it is necessary to develop certain techniques for continuously monitor control systems such as it can keep track of process changes maintaining the characteristics of efficiency of the original controller design. The divergences between con
Publicado em: 2007
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26. Nonlinear control system design using variable complexity modelling and multiobjective optimization
To design controllers for complex non-linear systems usually involves the use of expensive computational models. A non-linear thermodynamic model of a gas turbine engine is used to evaluate a selection of designs for a multivariable PI controller configuration. An approach using variable complexity modelling (VCM) is introduced to allow more designs to be ev
Sba: Controle & Automação Sociedade Brasileira de Automatica. Publicado em: 2006-03
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27. Controle e monitoramento em tempo real do regime de jorro estavel atraves da analise espectral / Control and monitoring on line of the steady regime in the spouted bed process by spectral analysis
This work describes the control and on line monitoring of the spouted bed steady regime using the gas-solid contact regimes identification method by pressure measurements. The work presents two main features: 1) the on line identification of fluid dynamic regimes in the spouted bed process based in the spectral analysis of the pressure fluctuations and 2) th
Publicado em: 2006
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28. CONTRIBUIÇÃO AO ESTUDO DA MÁQUINA ASSÍNCRONA TRIFÁSICA DUPLAMENTE ALIMENTADA APLICADA A AEROGERADORES DE VELOCIDADE VARIÁVEL
This work presents the analysis and implementation of a vector control applied to Doubly-Fed Induction Generators (DFIG) used in grid connected wind turbines. DFIGs are nowadays the more widely used concept for grid connected wind turbine, especially for rated power above 1 MW. The main reason is the low rotor PWM power converter rating. The present work dea
Publicado em: 2006
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29. Ambiente Educacional Multifuncional Integrado para Sintonia e Avaliação do Desempenho de Malhas Industriais de Controle
Industrial processes as well as the production based on the philosophy of quality assurance demand controllers that work facilities with their finely parameters, independent of the load situations and disturbances. A lot has been spoken regarding the PID controllers tuning, however, still, most is used in way PI or they possess adjusted parameters in an inad
Publicado em: 2006
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30. Estudo experimental de um controle adaptativo para um sistema de refrigeração / Experimental study of a refrigeration system using an adaptative control
This research deals with a experimental study of vapor compression refrigeration system, with variable speed compressor using adaptative fuzzy control, comparing its results with On-Off and PI control. The experimental equipment used is composed of a semi-hermetic compressor, concentric tube evaporator and condenser, thermostatic expansion valve with manual
Publicado em: 2006
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31. Estudo experimental de um controle adaptativo para um sistema de refrigeraÃÃo / Experimental study of a refrigeration system using an adaptative control
This research deals with a experimental study of vapor compression refrigeration system, with variable speed compressor using adaptative fuzzy control, comparing itâs results with On-Off and PI control. The experimental equipment used is composed of a semi-hermetic compressor, concentric tube evaporator and condenser, thermostatic expansion valve with manua
Publicado em: 2006
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32. Controle dinâmico de robôs móveis com acionamento diferencial
This work addresses the dynamic control problem of two-wheeled differentially driven non-holonomic mobile robot. Strategies for robot positioning control and robot orientating control are presented. Such strategies just require information about the robot conguration (x, y and teta), which can be collected by an absolute positioning system. The strategies de
Publicado em: 2006
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33. Controle Neurofuzzy de motor de indução com estimação de parâmetros e fluxo de estator
Este trabalho tem como principal proposta o desenvolvimento de um controlador neurofuzzy, que apresente-se como uma alternativa aos controladores convencionais PI. O controlador proposto, o Online Neurofuzzy Controller (ONFC), tem como principal diferença em relação às outras estruturas neurais e neurofuzzy aplicadas a sistemas de controle, o fato do sin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/04/2005
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34. Desenvolvimento e implementação de controladores nebulosos em uma coluna piloto de destilação em batelada
This work is concerned in the application of fuzzy logic in chemical process control. Fuzzy controllers development and implementation were described and applied to a binary system batch distillation. Algorithms of fuzzy control that are similar to conventional P, PI, PID controllers were developed and implemented in FORTRAN. First of all, algorithms were te
Publicado em: 1999
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35. Implementação digital utilizando DSP do controle por orientação do fluxo do rotor : metodos direto e indireto
In this work the digital implementation of a field rotor flux oriented based control of a squirrel cage induction motor, using a versatile Motorola 56001 digital signal processor is presented. Two methods of orientation are studied: the direct and indirect. The control system contains a PI speed controller. An introductory investigation of the use of Genetic
Publicado em: 1999
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36. Modelagem, simulação e controle de reatores cataliticos de leito fixo
In this work, pseudo-homogeneous bi- and uni-dimensional fixed bed catalytic reactors are presented. Such models incorporate the fluid and solid thermal capabilities, (pCp)f e (pCp)s, respectively. The proposed models reproduce a dynamic behaviour expected in a fixed bed catalytic reactor, including the inverse response phenomenon. The bi-dimensional models
Publicado em: 1999