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Previous issue date: 2016-03-01 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Estruturas e sistemas inteligentes tem como principal caracter?stica a capacidade de emular o comportamento de organismos vivos, os quais possuem comportamento autorregulado. Deste modo, devido a presen?a de um mecanismo de est?mulo-resposta, este tipo de estrutura possui propriedades adaptativas. O termo estrutura inteligente vem sendo usado para identificar sistemas estruturais capazes de modificar sua geometria e/ou propriedades f?sicas no intuito de executar determinada tarefa. Neste trabalho, um controlador por modos deslizantes com compensa??o difusa ? empregado para o controle ativo de vibra??es em uma treli?a de Von Mises feita de liga com mem?ria de forma. Este sistema possui uma din?mica bastante rica e complexa, podendo apresentar comportamento ca?tico mesmo quando submetido a carregamentos de frequ?ncias moderadas. Simula??es num?ricas s?o apresentadas para comprovar a efic?cia da estrat?gia utilizada. / Smart structures and systems have the main purpose to mimic living organisms,
which are essentially characterized by an autoregulatory behavior. Therefore,
this kind of structure has adaptive characteristics with stimulus-response mechanisms.
The term adaptive structure has been used to identify structural systems
that are capable of changing their geometry or physical properties with the purpose
of performing a specific task. In this work, a sliding mode controller with fuzzy inference
is applied for active vibration control in an SMA two-bar truss. In order to
obtain a simpler controller, a polynomial model is used in the control law, while a
more sophisticated version, which presents close agreement with experimental data,
is applied to describe the SMA behavior of the structural elements. This system has
a rich dynamic response and can easily reach a chaotic behavior even at moderate
loads and frequencies. Therefore, this approach has the advantage of not only obtaining
a simpler control law, but also allows its robustness be evidenced. Numerical
simulations are carried out in order to demonstrate the control system performance.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/21124 |
| Date | 01 March 2016 |
| Creators | Medeiros, Philippe Eduardo de |
| Contributors | 05362438751, http://lattes.cnpq.br/3256782908311485, Queiroz, Kurios Iuri Pinheiro de Melo, 01187266418, http://lattes.cnpq.br/7489022506091803, Savi, Marcelo Amorim, 83037497734, http://lattes.cnpq.br/1224532648969159, Dias, Samaherni Morais, 03199668445, http://lattes.cnpq.br/9792492584361511, Bessa, Wallace Moreira |
| Publisher | Universidade Federal do Rio Grande do Norte, PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA MECATR?NICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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