Controle ativo de vibração em estruturas inteligentes utilizando um controlador por modos deslizantes com compensação difusa
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...
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| Formato: | Dissertação |
| Idioma: | por |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/21124 |
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| Resumo: | 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. |
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