Can Bus
Mostrando 25-36 de 59 artigos, teses e dissertações.
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25. Controle robusto de sistemas de potência multimáquinas através de desigualdades matriciais lineares: abordagem por alocação de pólos e ajuste de estabilizadores de sistemas de potência. / Robust control of multimachine power systems through linear matrix inequalities: the pole placement approach with power system stabilizers adjustment.
The aim of this work is to elaborate robust control algorithms to power systems. The mathematical model employed to describe the multimachine power system is that used in small signal studies, and the main goal is to increase the damping of the critical eigenvalues of the system, guaranteeing its stability and performance in various operating conditions. To
Publicado em: 2008
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26. Procedimentos espontâneos de aprender LE (inglês) : um esboço de análise da competência espontânea de aprender do aluno
The student has a spontaneous learning competence which is guided by traditions and knowledge that come from various origins and contexts. When studying in a formal context (at school) his choices can be, among other things, guided by the teacher and/or classmates. Besides the influences deriving from the formal context, in the classroom extensions the stude
Publicado em: 2008
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27. Estudo de soluções do fluxo de potência em coordenadas cartesianas
This work presents the modelling and some methodologies to solve the steady state power network equations in rectangular coordinates, including the determination of the critical loadability. Firstly, four methods are presented, from the conventional application of the Newton-Raphson method to some approaches proposed more recently in the literature. Addition
Publicado em: 2008
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28. Analysis of performance of protocol CAN for agricultural field application using coloured Petri net / Análise de desempenho do protocolo CAN para aplicação na área agrícola utilizando redes de Petri coloridas
Intemational and national research institutions and companies have focused efforts to develop and promote the implementation of the international standard ISO 11783, based upon the digital communication protocol CAN (Controller Area Network), in order to integrate devices in machines and agricultural implements. Therefore, it is presented the development and
Publicado em: 2007
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29. Avaliação comparativa de tecnologia de transporte público urbano: ônibus x transporte público individualizado / A comparative assessment of transit technologies: bus x personal rapid transit (PRT)
This work discusses a methodology for the appraisal of new technologies of urban public transportation. The objective is to apply such a methodology to make possible a comparison of different technologies for public transportation. This work also considers the introduction of the personal rapid transit (PRT) in a brazilian medium-sized city as a potential ca
Publicado em: 2007
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30. Computation of voltage stability margins of power systems / Obtenção da margem minima de estabilidade de tensão de sistemas eletricos de potencia
This work presents a new and fast method for computing the minimum voltage stability margin of electric power systems. The computation of the voltage stability margin (VSM) is often required for the planning and operation of power systems. Usually, loads are increased along a predefined direction, which can be estimated based on historical data or load forec
Publicado em: 2007
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31. Settles Portraits: A case study in rural settles formed by migrants in Federal District Overturn Region. / Retratos de assentamentos: um estudo de caso em assentamentos rurais formados por migrantes na região do entorno do Distrito Federal
This thesis is based on a research made in Federal Distict overturn region, in the town of Padre Bernardo GO, in the Pé de Serra region, between 2004 and 2006, in four rural settles. In general lines, it aims to know the daily routine and the sociability forms in these rural settles, formed by migrant families. One of the chosen ways to understand the propo
Publicado em: 2007
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32. Uma metodologia baseada em algoritmos genéticos para melhorar o perfil de tensão diário de sistemas de potência = : A genetic-algorithm-based methodology for improving daily voltage profile of power systems / A genetic-algorithm-based methodology for improving daily voltage profile of power systems
The main contribution of this thesis is the proposal of a new methodology together with the implementation of a decision support system for real-time transmission grid operation. Hence, a methodology for improving voltage pro- _le for power transmission systems is described in this thesis. Basically, it consists in tuning the transformers taps in a way that
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/01/2006
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33. 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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34. STUDY OF PHYSICAL AND MENTAL LOAD OF THE URBAN BUS DRIVERS IN THE CITY OF RIO DE JANEIRO / ESTUDO DOS CONSTRANGIMENTOS FÍSICOS E MENTAIS SOFRIDOS PELOS MOTORISTAS DE ÔNIBUS URBANO DA CIDADE DO RIO DE JANEIRO
This study tried to know a little better the professional life of the urban bus drivers in the city of Rio de Janeiro. Firstly, a brief historical revision was done about the bus and the urban bus driver professional. Then, main information about human, physical and psychic costs where presented. A problematization, as part of Ergonomic Appreciation was perf
Publicado em: 2006
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35. Arquitetura para extração de características invariantes em imagens binárias utilizando dispositivos de lógica programável complexa / Architectures for the extraction of invariant characteristics from binary images using logic programmable devices
A challenge for digital systems designers is to meet the balance between speed and flexibility was always. FPGAs and CPLDs where used as glue logic, reducing the number of components in a system. The use of programmable logic (CPLDs and FPGAs) as an alternative to microcontrollers and microprocessors is a real issue. Moments of the intensity function of a gr
Publicado em: 2006
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36. System on chip and CAN technologies into distributed control systems / Tecnologias system on chip e CAN em sistemas de controle distribuído
Control systems require strict time constraints to work properly, being therefore considered real-time systems. When such systems are distributed, controllers, sensors, and actuators are generally interconnected by fieldbuses. In this context the fieldbuses play an important role in the system global behavior. This research presents the description of the de
Publicado em: 2006