Navegando por Assunto "Control systems"

Agora exibindo 1 - 3 de 3

Acesso aberto (Open Access)
Estudo comparativo de técnicas de inteligência de enxame na redução da ordem de sistemas dinâmicos lineares
(Universidade Federal do Pará, 2019-12-17) SILVA, Marlon John Pinheiro; SILVA, Orlando Fonseca; http://lattes.cnpq.br/7387718587227127; COSTA JÚNIOR, Carlos Tavares da; http://lattes.cnpq.br/6328549183075122
A redução de ordem de modelos tem se mostrado um problema bastante recorrente e diversas técnicas surgiram ao longo dos anos, quando, do ponto de vista do projeto de controladores, se tornou inadequada a elaboração e construção destes, visto o alto grau de redundância, que sistemas físicos reais de grande porte podem possuir. No âmbito da matemática determinística, muitos trabalhos, já consagrados na literatura, se propuseram a resolver tal problemática. Recentemente, técnicas que envolvem métodos metaheurísticos em um espaço de busca pré-determinado, utilizando Inteligência de Enxames, vêm sendo utilizados com bastante êxito e tem se mostrado uma nova ferramenta como solução. Com base neste contexto, este trabalho apresenta a compreensão do problema sob o ponto de vista da teoria de sistemas lineares; realizando um estudo comparativo entre as Inteligências de Enxames: Firefly Algorithm, enxame de partículas (PSO do inglês - Particle Swarm Optimization) e SFLA (do inglês - Shuffled Frog Leaping Algorithm).
Acesso aberto (Open Access)
LABEXP - Laboratório de experimentação remota em tempo real
(Universidade Federal do Pará, 2009-08-14) SANTOS, Diego Lima; COSTA JÚNIOR, Carlos Tavares da; http://lattes.cnpq.br/6328549183075122
This work proposes the Real Time Remote Experimentation Laboratory’s (LabExp) development and implementation process. This laboratory is actually working in Universidade Federal do Pará aiming to act as an auxiliary tool for teaching and learning of control systems disciplines. Teaching and learning were included through experiments availability, where users may interact with them, changing parameters and observing this interaction results. Besides experiments availability, it is believed that in online learning environments it is interesting to make available for students tools that provide greater interaction between students and teachers and with the remote laboratory, providing a more collaborative approach to learning, encouraging the student. This way, it is available to students three applications: one to submit their own experiments, another for interaction with other students through a forum, and another to send your opinions/criticisms. Before LabExp’s development and implementation process, it was make a brief analysis about online education, because this is the laboratory’s purpose. This analysis provided more knowledge about this method of education, guiding the rest of LabExp’s development. It is understood that the technologies used are not critical for a remote laboratory’s development, directed to online education, however remote experiments of control systems have a temporal restriction, i.e. need to obey restrict time limits, working in real time. To achieve this behavior it was used the Real Time Application Interface (RTAI), with the RTAIXML component. Beyond used technologies, this work also presents LabExp’s modeling process, according to Unified Modeling Language (UML) standard, principles and resources, applied to web applications. This modeling process was of fundamental importance, because it facilitated and guided the laboratory’s development.
Acesso aberto (Open Access)
Sistematização de projetos de controladores fuzzy através de programação orientada a objetos
(Universidade Federal do Pará, 2009-10-06) LEITÃO, Álvaro Luís dos Reis; COSTA JÚNIOR, Carlos Tavares da; http://lattes.cnpq.br/6328549183075122
By using object oriented language programming and, applying a specific programming technique, it‟s possible to generate a set of generic classes whose objects represent each block of a fuzzy controller as well its linguistic variables. Such classes, being applied in a systematic way, make easy the programming of a set of controllers of this nature. This work presents this technique and shows the results obtained via a model simulation of a inverted rotational pendulum which is controlled by a control system composed by three fuzzy controllers designed and built under this point of view.