Eventos Anais de eventos
CONEM 2022
XI Congresso Nacional de Engenharia Mecânica - CONEM 2022
NONLINEAR DYNAMICS OF AN ADAPTIVE ENERGY HARVESTER WITH MAGNETIC INTERACTION
Submission Author:
Pedro Savi , RJ , Brazil
Co-Authors:
Pedro Savi, Marcelo Savi
Presenter: Pedro Savi
doi://10.26678/ABCM.CONEM2022.CON22-0375
Abstract
This work investigates the mechanical energy harvesting from smart and adaptive devices using magnetic interaction. The energy harvesting device is built from a magneto-elastic beam that interacts with magnets. The mechanical system is connected to the electrical circuit by magnetostrictive materials that promotes energy conversion. Magnetic interactions are modeled by considering a modified single point magnet dipole method. A novel model is proposed using multiple points to represent the magnetic dipole. Based on the magnetic interaction model, an adaptive energy harvesting device is proposed by assuming a magneto-elastic beam interacting with magnets that can change their position with respect to the beam. The adaptive behavior allows one to alter the system stability and therefore, its dynamical response. A nonlinear dynamics analysis is performed showing the possibilities to enhance energy harvesting capacity from the magnet position change. The strategy is to control the energy barrier based on dynamical characteristics of the system. Results show interesting conditions where energy harvesting capacity is dramatically increased by changing the system characteristics passing through mono, bi and tri stable systems.
Keywords
Mechanical energy harvesting, nonlinear dynamics, smart materials, adaptive systems, magnetic interaction
