Controle das propriedades dinâmicas de sistemas mecânicos através da utilização de molas inteligentes

• Ano de defesa: 2015
• Autor(a) principal: Castilho Filho, Edson Luiz Valverde [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Vibração; Amortecimento (Mecanica); Dinamica estrutural; Vibration
• Link de acesso: http://hdl.handle.net/11449/138473; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/15-04-2016/000864230.pdf

Modern production systems increasingly require good reliability and performance of their machines and equipment. Those which have high vibration levels tend to deteriorate sooner and to produce poor production processes, which means that the maximum availability cannot be exploited. In recent years, due to the desire to mitigate the effects of vibration, systems which are capable of controlling the dynamic displacements and forces generated by equipment, have been studied. The work in this dissertation presents a study of a semi-active control technique which changes the dynamic properties of a machine, through the modification of the system stiffness, to produce the effect of vibration reduction. A methodology is developed to evaluate the effect of the system stiffness alteration through dynamic analysis. A potential implementation of a design capable of modifying the stiffness of a mechanical system is presented, and simulations are carried out into its performance as a machine passes through its natural frequency. The results show that the design works in principle and has the potential to work in a real experimental system