Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Investigation of the passive vibration control using low-cost piezoelectric ceramics and a purely resistive shunt circuit
Submission Author:
Adailton Gomes Pereira , SP
Co-Authors:
Adailton Gomes Pereira, Maria Carolina Barcellos de Oliveira, Sidney Bruce Shiki, Armando Ítalo Sette Antonialli
Presenter: Adailton Gomes Pereira
doi://10.26678/ABCM.COBEM2021.COB2021-0933
Abstract
Vibrations are present in all mechanical structures and machines, usually being harmful to those systems. In this sense, passive vibration control techniques have been developed in order to minimize the occurrence of mechanical oscillations by adding damping to the system, usually without the need of a complex hardware. One of these techniques is characterized by the use of piezoelectric materials connected to an electrical circuit. In comparison to other techniques, it can be considered less robust but presents good results at the same time that it requires low investment. This work aims to analyze numerically and experimentally the efficiency of the aforementioned technique using a purely resistive electrical circuit in a cantilever aluminum beam. The value of the resistance was varied in both numerical simulations and experimental tests in order to understand its impact on the efficiency of the device under analysis. In the numerical and experimental analysis, the efficiency of the device in reducing the vibrations of the structure was proven. In the experimental tests, it was concluded that the piezoelectric shunt enabled to reduce mechanical vibrations up to 25% next to the resonance frequency.
Keywords
mechanical vibrations, Passive Vibration Control, Piezoelectric materials
