Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
NONLINEAR EFFECTS ON EXPERIMENTAL PIEZOMAGNETOELASTIC ENERGY HARVESTING
Submission Author:
gabriel xavier gonçalves borges , RJ
Co-Authors:
gabriel xavier gonçalves borges, Luã Guedes Costa, Arthur Adeodato, Brenno Tavares Duarte, Luciana Loureiro da Silva Monteiro, Pedro Manuel Calas Lopes Pacheco, Marcelo Savi
Presenter: gabriel xavier gonçalves borges
doi://10.26678/ABCM.COBEM2019.COB2019-0865
Abstract
Recently, the study of the conversion of vibrational energy into electrical power has become a important field of research for clean and renewable energy resources. That concept has been improved on smart material field, due the last decade technological achievements on piezoelectric materials. Further, several low power devices as sensor and actuators were developed, so the energy harvesting through piezoelectric materials excited by environmental vibrations become a potential energy source on engineering. However, researchers still face challenges for the low energy efficiency of those conventional devices. The bistable energy harvesting devices have attracted significant attention due to some of their unique features, that method may rise those devices efficiencies. This paper investigates a piezomagnetoelastic systems that consists of a permanent magnet fixed to the end of a piezoelectric cantilever which interacts with another magnet placed close to the free end of the cantilever, when the system is subjected to a harmonic base excitation. The magnets generate nonlinear repulsive force and make the structure bistable. The nonlinear energy harvester responds to vibration with large tip deflections and high energy orbit oscillations. Thus, the system exhibits a broadened frequency response and chaotic motion, enhancing its energy harvesting potential.
Keywords
Nonlinear systems, energy harvesting, Piezomagnetoelastic, smart materials
