Eventos Anais de eventos
CONEM 2022
XI Congresso Nacional de Engenharia Mecânica - CONEM 2022
Performance Analysis of Broadband and Multidirectional Piezoelectric Vibration-based Energy Harvesters
Submission Author:
Virgilio Junior Caetano , RJ , Brazil
Co-Authors:
Virgilio Junior Caetano, Marcelo Savi
Presenter: Marcelo Savi
doi://10.26678/ABCM.CONEM2022.CON22-0116
Abstract
Vibration-based energy harvesting systems have been investigated as an alternative to power sources like batteries that have limited lifetime, need periodic recharge, and eventually replacement. In this regard, ambient vibration excitations may feature in a multidirectional and broadband frequency spectrum. Usually, piezoelectric energy harvesting devices presented in the literature are still associated with unidirectional behavior, being suitable for operating under transverse vibration direction, which cannot explore all energy potential available in the environment. This work presents a comparative analysis between two multimodal piezoelectric mechanical energy harvesting systems to operate under multidirectional and broadband excitation sources: 8-irregular-slice pizza-shaped (8-ISPS-PM) and star-shaped (SSH) configurations. Multiple inertial pendular-like masses are used to harvest energy from three-direction excitation sources with a broadband spectrum. The devices are modeled based on the finite element method using the ANSYS software. Modal, harmonic, and transient simulations are carried out in order to design the system to operate in the required frequency range and to investigate the system performance. Results for in-plane and out-of-plane excitations show that the proposed devices have potential to operate in a wideband frequency spectrum, serving as an alternative to conventional linear cantilever-type energy harvester with a single vibration mode.
Keywords
energy harvesting, multimodal systems, multidirectional harvester
