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Itens para a visualização no momento 21-30 of 2146
Algoritmo de localização de nodos para redes de sensores móveis
(Universidade Federal de Santa Maria, 2009-12-21)
This thesis presents contributions to node localization in mobile sensor networks. Considering the importance of localization algorithms in identifying the location of an
event in order to better determine the action to ...
Utilização de conversores eletrônicos que alimentam leds de alto brilho na aplicação em tecido humano e sua interação terapêutica
(Universidade Federal de Santa Maria, 2009-08-31)
This paper presents a study on the application of high-brightness LED (Light Emitting Diode)to health care. The LEDs are supplied by electronic converters, proposed in order to analyze the light emitted by the LEDs and ...
Processamento de sinais analógicos amostrados utilizando técnicas de chaveamento a capacitor e a corrente aplicados à conversão AD sigma delta
(Universidade Federal de Santa Maria, 2009-08-27)
Circuits for sampling and retention of analogue signals are commonly implemented with techniques such as switched capacitors (SC). SC circuits employing the storage of charge in a linear capacitor to represent a signal in ...
Utilização avançada da capacidade excedente de sistemas de transmissão CCAT para produção de oxigênio e hidrogênio
(Universidade Federal de Santa Maria, 2008-04-02)
This PhD thesis discusses the use of the power plant capacity in HVDC transmission systems during inactive periods of the main converters to feed local loads, aiming at a better AC power quality and DC transmission. The ...
Controle adaptativo robusto de estrutura variável por modelo de referência aplicado a filtros ativos de potência
(Universidade Federal de Santa Maria, 2010-08-27)
This works presents a Robust Variable Structure Model Reference Adaptive Control scheme denoted VS RMRAC. In this adaptive control strategy, each parameter of the control law is obtained by the sum of two other adaptive ...
Contribuição ao estudo do gerador de indução duplamente alimentado: operação durante distúrbios na rede elétrica
(Universidade Federal de Santa Maria, 2010-08-30)
The Doubly Fed Induction Generator (DFIG) is one of the most frequently deployed large grid connected Wind Turbines (WT) concept. The implementation of classical
vector control techniques, have been proven to work well for ...
Técnicas de integração de circuitos de auxílio à comutação aplicadas a inversores e a sistemas multi-pólos
(Universidade Federal de Santa Maria, 2007-09-19)
This Ph. D. dissertation presents contributions to the investigation of soft-switching cells with integrated components, presenting three main approaches: (i) Soft-switching cells with filter coupled inductor; (ii) Integrated ...
Controladores discretos de tensão baseados no princípio do modelo interno aplicados a inversores trifásicos PWM
(Universidade Federal de Santa Maria, 2005-12-09)
This thesis contributes to the analysis, project and implementation of discrete-time controllers based on the Internal Model Principle, aiming to improve the performance of three-leg three-phase PWM inverters with insulating ...
O planejamento estratégico do Grêmio Foot Ball Porto Alegrense e do Sport Clube Internacional através de modelos interpretativos
(Universidade Federal de Santa Maria, 2005-08-15)
On several business departaments, the strategic planning is becoming very important and the organizations need to know and understant ist methods to get the success in the business environment. This planning is valid for ...
Bases para a formação continuada do engenheiro de desenvolvimento de produto visando inovação tecnológica.
(Universidade Federal de Santa Maria, 2005-04-01)
Within a new reality in the products development sector, with the innovation getting into a supremacy, it is important to discuss which is the formation that the engineering professionals are getting in the function in ...