Journal
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
Volume 29, Issue 13, Pages 2728-2743Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/1045389X18778363
Keywords
Control; active composites; piezoelectric; actuator; sensor
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Funding
- Ministerio da Ciencia, Tecnologia e do Ensino Superior and Fundo Social Europeu (MCTES and FSE) under programme POPH-QREN
- Ministerio da Ciencia, Tecnologia e do Ensino Superior and Fundo Social Europeu (MCTES and FSE) under programme Investigador FCT
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A local collocation method based on finite difference generated radial basis functions considering supplementary polynomials is used to solve the governing equations of cantilever piezoelectric smart beams. The natural modes of vibration of a bimorph and a three-layered smart beam with an interior aluminium core are analysed for both open-circuit and closed-circuit electrical boundary conditions. Very accurate results are obtained at a low computational cost. Subsequently, a constant gain velocity feedback active vibration control system is implemented, and the time and frequency response functions of both beams subjected to initial impulse and displacement conditions are investigated. Different values of the applied gain and varying thickness of the piezoelectric layers are analysed. The governing equations are established using equivalent-single-layer first-order-shear-deformation theory with through-the-thickness quadratic layerwise electric potential for improved accuracy.
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