Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
EXPERIMENTAL INVESTIGATION OF PIEZOELECTRIC VIBRATION-BASED ENERGY HARVESTING WITH SHAPE MEMORY ALLOY ELEMENTS
Submission Author:
Arthur Adeodato , RJ
Co-Authors:
Arthur Adeodato, gabriel xavier gonçalves borges, Brenno Tavares Duarte, Ricardo Alexandre Amar de Aguiar, Luciana Loureiro da Silva Monteiro, Pedro Manuel Calas Lopes Pacheco, Marcelo Savi
Presenter: Arthur Adeodato
doi://10.26678/ABCM.COBEM2019.COB2019-0726
Abstract
Piezoelectric vibration-based energy harvesting systems have an inherent disadvantage when operating in linear conditions. The maximum power output for these systems is obtained by matching their resonance frequencies with the ambient source frequencies, but significant reduction of the output power occurs for small source frequency deviations, resulting in a narrowband harvester system. Nowadays, many researches have included different kinds of nonlinearities to increase the bandwidth of the energy harvesters producing a broadband energy harvesting system. This paper presents an experimental analysis of a system based on a new concept with the synergistic use of smart materials considering a piezoelectric energy harvester combined with shape memory alloy helical spring proposed to improve system performance through the temperature control. The main idea is to use temperature variations to change the power amplitude and also to shift the peak of the power curve as a function of frequency. The piezoelectric-SMA system is temperature dependent and two major mechanisms are used to modify the system dynamics: stiffness change and dissipation due to hysteresis.
Keywords
Energy harvesters, smart materials, Piezoelectric materials, Shape Memory Alloy, experimental analysis
