Navegando por Assunto "Controle fuzzy"

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Acesso aberto (Open Access)
Sistema de controle baseado em lógica fuzzy para regulagem de temperatura em aquecedor de óleo térmico da planta de anodo verde da Albrás
(Universidade Federal do Pará, 2011-12-23) ALMEIDA, José Guilherme Castro de; BARRA JUNIOR, Walter; http://lattes.cnpq.br/0492699174212608
This work presents the results of a fuzzy control strategy to regulate the temperature of the heater thermal oil, in the Anode Green process at Albrás Aluminum Brasileiro S/A factory. The use of this methodology has resulted in the system being able to react adequately against of the variations on the point of operation of the heater, because the Fuzzy control displays some characteristics of human learning. The heater thermal oil equipment is fundamental in the process of manufacture of blocks butts, used as positive pole in the process of electrolysis in the acquisition of primary aluminum. The system of thermal oil warms the mixers and pre-heating of coke, keeping the temperature of the equipment within the limits established by process engineering. The variable temperature impacts directly in the energy mix of the pulp and the quality of the final product, which is block anode. The methodology presented allowed to reach a temperature control that satisfactorily achieved the process parameters. The program was developed in language scada is executed in programmable logic controllers (PLC'S) of Rockwell Automation. The methodology presented allowed to reach a temperature control that satisfactorily achieved the process parameters. The control is already in full operation at the plants of anodes and the results obtained demonstrate the effectiveness and viability of the system, which in future will be implemented in the control of other equipment of Albras.
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.