Navegando por Assunto "Controle adaptativo"

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Acesso aberto (Open Access)
Técnica de controle preditivo baseado em modelo aplicada ao controle de tensão de um gerador síncrono - resultados experimentais
(2012-10) MOUTINHO, Marcelo Nascimento; BARRA JUNIOR, Walter; COSTA JÚNIOR, Carlos Tavares da; BARREIROS, José Augusto Lima
This paper presents the results of the experimental evaluation of a digital self-tuning predictive control methodology applied to the voltage control of a small-scale energy generation system. A recursive estimator based on the well known least-squares method is used in the identification stage of the proposed controller. The stage for calculation of the signal control method is performed with the Generalized Predictive Controller (GPC) algorithm. The experimental evaluation was performed using step perturbations applied in different operating conditions of the studied power system. For comparison purposes, the results of the evaluation of a self-tuning controller using the pole-placement method for the control signal formulation and three digital controllers with fixed parameters also will be presented.
Acesso aberto (Open Access)
Trajetórias de aprendizagem, aconselhamento linguageiro e teoria da complexidade
(Universidade Federal do Pará, 2015-09) SILVA, Walkyria Alydia Grahl Passos Magno e; MATOS, Maria Clara Vianna Sá e; RABELO, Jhonatan Allan de Andrade
Since the founding text linking complexity with foreign languages learning (LARSEN-FREEMAN, 1997), this theme has been present in researches in several countries. However, few studies reporting experiments described under this paradigm were published, explaining the success or failure in students´ trajectories. This text aims at showing how this can happen in language learners´ stories of TEFL undergraduates in a university in Northern Brazil. In language advising sessions, the authors, who are all advisors and researchers, identify bifurcation points, attractor basins, synergetic or entropic episodes in students´ trajectories. Results show how the interference of the advisor, as another agent in the system, can alter the learning process.