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Author(s): C. M. A. Vasques
J. D. Rodrigues
Title: Classical and optimal active vibration control of smart piezoelectric beams
Issue Date: 2004
Abstract: In this paper a numerical study concerning the active vibration control of smartpiezoelectric beams is presented. A comparison between the classical control strategies,constant gain and amplitude velocity feedback, and optimal control strategies,linear quadratic regulator (LQR) and linear quadratic Gaussian (LQG) controller, isperformed in order to investigate their effectiveness to suppress vibrations in beamswith piezoelectric patches with sensing and actuating capabilities.As a mathematical model, a one-dimensional finite element of a three-layered smartbeam with two piezoelectric surface layers and metallic core is utilized and brieflypresented. The mathematical model considers a partial layerwise theory, with threediscrete-layers, and a fully coupled electro-mechanical theory. The finite elementmodel equations of motion and electric charge equilibrium are presented and recastinto a state variable representation in terms of the physical modes of the beam.The analyzed case studies concern the vibration reduction of a cantilever aluminumbeam with a pair of collocated piezoelectric patches mounted on the surface. The displacementtime history, for an initial displacement field and white noise force disturbance,and point receptance at the free end are evaluated with the open- and closedloopclassical and optimal control systems. The case studies allow to compare theirperformances and demonstrate their advantages and disadvantages.
Subject: Engenharia mecânica, Engenharia mecânica
Mechanical engineering, Mechanical engineering
Scientific areas: Ciências da engenharia e tecnologias::Engenharia mecânica
Engineering and technology::Mechanical engineering
Source: Proceedings of the Seventh International Conference on Computational Structures Technology
Document Type: Artigo em Livro de Atas de Conferência Internacional
Rights: openAccess
Appears in Collections:FEUP - Artigo em Livro de Atas de Conferência Internacional

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