Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Analysis of piezoelectric sensor networks for spatial modal filters and active vibration control
Submission Author:
Filipe Horiy , SP
Co-Authors:
Augusto Shigueoka, Marcelo A. Trindade, Filipe Horiy
Presenter: Marcelo A. Trindade
doi://10.26678/ABCM.COBEM2017.COB17-0838
Abstract
This work presents an analysis of a regular network of piezoelectric sensors and actuators on a rectangular plate and its application to a non-collocated active vibration control using a feedback of a signal obtained from a weighted-sum of the signals from the sensors in the network. Two methodologies are considered to combine the sensors signals. The first is based on the concept of spatial modal filters in which the combined signal is built to approximate a mono-modal response. This leads to the evaluation of the weighting of each sensor signal using the inversion of the Frequency Response Function matrix through a LSQ method. The second technique consists on the search for the weighting of the sensors signals that minimizes a closed-loop cost function, considering a direct derivative feedback, through a genetic algorithm optimization method. For that, an electromechanically coupled finite element model of the plate with bonded piezoceramic patches is considered. Results have shown that it is possible to obtain a very good closed-loop performance, although within a limited frequency band, by using these techniques. As expected, the optimization based on the closedloop response provided better results.
Keywords
Vibration control, sensor networks, spatial modal filters, Piezoeletric materials
