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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Design of quasi-static piezoelectric plate based transducers by using topology optimization

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Autor(es):
Motta Mello, Luis Augusto [1] ; Kiyono, Cesar Yukishigue [1] ; Nakasone, Paulo Henrique [1] ; Nelli Silva, Emilio Carlos [1]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Sch Engn, Dept Mechatron & Mech Syst Engn, Sao Paulo - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: Smart Materials and Structures; v. 23, n. 2 FEB 2014.
Citações Web of Science: 4
Resumo

Sensors and actuators based on piezoelectric plates have shown relevance in the field of smart structures. Recently, modern design techniques such as the topology optimization method have been applied to design laminated piezoelectric transducers, and design requirements such as maximizing static displacements (actuator design) and output voltages (sensor design) have been employed. However, it may be desirable to keep the transducer working range before its first resonance frequency. In this case, the (displacement or voltage) amplitude is expected to be constant with excitation frequency, which may not be the case when only static design requirements are employed. Thus, considering sensor design, if the amplitude is constant, an undetected change in the excitation frequency would cause a small measurement error. Regarding actuators, on the other hand, if the first resonance frequency is small, oscillations in the response to a step excitation (which is usually applied in quasi-static applications, i.e. applications in which the transducer operates under the first resonance frequency) could be high, ultimately causing overshoot, for instance. Thus, in this work, the topology optimization method has been applied to design piezoelectric transducers considering quasi-static operation, by distributing piezoelectric material over a metallic plate and by selecting the material polarization sign, in order to fulfil quasi-static design requirements. This is achieved by maximizing an objective function that depends on both displacements (for actuators) or output voltages (for sensors), and first resonance frequencies. The applied methodology, which encompasses the optimization problem formulation and numerical implementation, is presented. The achieved computational results, corresponding to the design of different types of transducers, clearly show the potential of the proposed methodology to increase the quasi-static working frequency range. (AU)

Processo FAPESP: 12/14576-9 - Projeto de Dispositivos Coletores de Energia Piezelétricos Utilizando o Método de Otimização Topológica
Beneficiário:Cesar Yukishigue Kiyono
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 06/50640-2 - Projeto de atuadores baseados em placas piezeletricas atraves do metodo de otimizacao topologica.
Beneficiário:Paulo Henrique Nakasone
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 09/18210-6 - Projeto otimizado de microsistemas atuados eletro-termicamente considerando efeitos de não-linearidade, redução do tempo de resposta e o conceito de materiais com gradação funcional
Beneficiário:Luis Augusto Motta Mello
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 11/02387-4 - Dispositivos piezocompósitos inovadores para nanoposicionamento e coleta de energia
Beneficiário:Emílio Carlos Nelli Silva
Linha de fomento: Auxílio à Pesquisa - Regular