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DINAME2019
DINAME2019
Closed-loop multiobjective optimization of piezoelectric patches for active vibration control of a rectangular plate
Submission Author:
Augusto Shigueoka , AM
Co-Authors:
Augusto Shigueoka, Helio Cruz, Filipe Horiy, Marcelo A. Trindade
Presenter: Augusto Shigueoka
doi://10.26678/ABCM.DINAME2019.DIN2019-0104
Abstract
The combination of modal filters with Direct Velocity Feedback (DVF) is a popular choice of active vibration control of flexible structures due to its simplicity. Even though some recent works have improved the design of spatial modal filters, even including sensor positioning, most of them focused on the attenuation of the spillover by only predefining the modes to be filtered in and considering any other mode as undesired spillover. In this work a closed-loop optimization is performed using a multiobjective Genetic Algorithm (GA). One of the objectives is the attenuation of select modes of vibration in the structure, while the other is the frequency bandwidth over which the system guarantees stability. The Pareto Front is found and the results for both rectangular and optimal placement shows the compromise between the two objectives. Then the optimal designs for three different frequencies are compared. We conclude that i) our closed-loop optimization also attenuates modes which were not required to be damped ii) sensor placement is not very advantageous over fixed sensors when the frequency bandwith used in the design is too narrow or too short.
Keywords
Vibration control, Piezoelectric materials, sensor networks, spatial modal filters, Optimization
