Caracterização e desenvolvimento de um atuador de força utilizando material de memória de forma

Detalhes bibliográficos
Ano de defesa: 2015
Autor(a) principal: Oliveira, Samuel de
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal da Paraíba
Brasil
Engenharia Mecânica
Programa de Pós-Graduação em Engenharia Mecânica
UFPB
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: https://repositorio.ufpb.br/jspui/handle/tede/7578
Resumo: This paper presents an experimental design of a power control system and position, using, as actuator, a coil spring of Shape Memory Alloy (SMA), consisting of Ni-Ti alloys, in an adapted screw table. A controller, closed loop, based on Fuzzy logic has been modeled to control the force exerted by the spring which the spring is manipulating by the temperature. In this work, the spring temperature was controlled by an electric current, which produces heat generation by Joule effect. A restoring spring was used to make the shape memory spring to restore the system to its original position. To supply the shape memory spring we used a controlled current source, whose current value that determines the desired force applied which is measured with a load cell and position by a camera connected a computer. The shape memory spring characteristics were determined from conventional approach to helical traction springs, and then characterized by Differential Scanning Calorimetry (DSC). The Fuzzy controller was modeled on LabVIEW installed on a computer equipped with a data acquisition system. The experimental results were obtained from tests on test bench, with the shape memory alloy spring with and without training.