Dsp System
Mostrando 13-24 de 35 artigos, teses e dissertações.
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13. Recombinant human proinsulin from transgenic corn endosperm: solvent screening and extraction studies
Recombinant pharmaceutical proteins are being produced in different systems such as bacteria and mammalian cell cultures. The use of transgenic plants as bioreactors has recently arisen as an alternative system offering many practical and economic advantages. However, finding an optimum strategy for the downstream processing (DSP) of recombinant proteins fro
Brazilian Journal of Chemical Engineering. Publicado em: 2007-09
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14. MI-SBTVD: a proposal for the Brazilian digital television system SBTVD
The objective of this paper is to present a general overview of the Innovative Modulation System Project -MI-SBTVD - developed for the Brazilian Digital TV System. The MI-SBTVD Project includes an LDPC high performance error correcting code, an advanced transmit spatial diversity and an efficient multi-carrier modulation scheme. The building blocks of the sy
Journal of the Brazilian Computer Society. Publicado em: 2007-03
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15. Estudo da tÃcnica de controle direto de conjugado - DTC tradicional, aplicada ao MIT / Study of the direct torque control technique applied to cage induction machines
This paper presents a study of the Direct Torque Control (DTC) based in the traditional technique. It used Switching Tables to drive the electronic converter that feeds the induction motor. Speed control is achieved. Two switching strategies are studied, one that only allows operation in two quadrants and other for four quadrants. Simulation of a complete sy
Publicado em: 2007
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16. Intelligent systems for welding process automation
This paper presents and evaluates the concept and implementation of two distinct multi-sensor systems for the automated manufacturing based on parallel hardware. In the most sophisticated implementation, 12 processors had been integrated in a parallel multi-sensor system. Some specialized nodes implement an Artificial Neural Network, used to improve photogra
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2006-03
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17. 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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18. SISTEMA EXPERIMENTAL FOTOVOLTAICO DE GERAÇÃO DE ENERGIA ELÉTRICA OPERANDO EM PARALELO COM A REDE ELÉTRICA CA / EXPERIMENTAL PHOTOVOLTAIC SYSTEM OF ELECTRIC ENERGY GENERATION SHUNT CONNECTED TO THE AC NETWORK
Esta dissertação descreve as etapas de desenvolvimento de um sistema experimental de geração de energia elétrica de 30 kW baseado em painéis solares fotovoltaicos montado no Campus da Universidade Federal de Juiz de Fora (UFJF). São apresentados detalhes do sistema fotovoltaico como: tipo e técnicas de chaveamento dos conversores estáticosCC-CC e CC
Publicado em: 2006
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19. Design of a didactic ande experimental testbed of low cost for applications in active control of vibration / Desenvolvimento de bancada didatico-experimental de baixo custo para aplicações em controle ativo de vibrações
Este trabalho apresenta uma bancada didática destinada ao ensino nos cursos de engenharia de aplicações em projetos de controle, processamento digital de sinais e programação em tempo real. Bancadas didáticas são ferramentas indispensáveis ao ensino, considerando que os conceitos vistos apenas em sala de aula são muitas vezes abstratos. A bancada em
Publicado em: 2006
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20. Ultrasound acquisition and signals processing system for characterization of biological and non-biological media / Sistema de aquisiÃÃo e processamento de sinais de ultra-som para caracterizaÃÃo de meios biolÃgicos e nÃo biolÃgicos
A utilizaÃÃo do ultra-som como alternativa Ãs tÃcnicas que utilizam radiaÃÃo por raio-X, alÃm de apresentar caracterÃsticas nÃo invasivas e nÃo ionizantes, demanda baixo custo e possibilita a obtenÃÃo de informaÃÃes das propriedades elÃsticas dos materiais. O presente trabalho apresenta o desenvolvimento de um sistema de aquisiÃÃo e processa
Publicado em: 2006
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21. Integrated system for image acquisition and processing / Sistema integrado de aquisiÃÃo e processamento de imagens
Este trabalho apresenta o projeto, a implementaÃÃo e os testes de um sistema integrado de aquisiÃÃo e processamento de imagens (SIAPI). O sistema desenvolvido à constituÃdo por um sensor de imagem CCD (Charge Coupled Device), um processador digital de sinais (Digital Signal Processor â DSP) de baixo custo responsÃvel pelo controle do sensor, um DSP d
Publicado em: 2005
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22. WIND TURBINE: MODELING, ANALYSIS AND CONTROL OF DOUBLY FED INDUCTION GENERADOR / TURBINAS EÓLICAS: MODELO, ANÁLISE, E CONTROLE DO GERADOR DE INDUÇÃO COM DUPLA ALIMENTAÇÃO
This thesis presents the main concepts and configurations used in wind turbine connected to the grid, as well as, an analysis, design and implementation of the control system for the Doubly Fed Induction Generator (DFIG). The DFIG has been selected since it is the concept frequently adopted by the wind turbine manufactures. In the thesis, it is presented a m
Publicado em: 2004
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23. 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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24. Analise e controle da energia eletrica atraves de tecnicas de processamento digital de sinais
Considering the areas of Power Quality and Power Conditioning, this work proposes and discusses the use of a Selective Identification Methodology in order to identify the so-called ideal, as well as the disturbing, voltage and current components in a general polyphase power system. Such methodology is presented and described by means of discrete-time signal
Publicado em: 2004