Open AccessModeling and Simulation Analysis of a Two-degree-of-Freedom Nonlinear Piezoelectric Energy Harvester
Author(s) -
Junxiang Jiang,
Shaogang Liu,
Jianhua Wu,
Lifeng Feng
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/649/1/012004
Subject(s) - energy harvesting , nonlinear system , cantilever , piezoelectricity , control theory (sociology) , energy (signal processing) , degrees of freedom (physics and chemistry) , bandwidth (computing) , acoustics , computer science , physics , engineering , structural engineering , telecommunications , control (management) , quantum mechanics , artificial intelligence
In order to improve energy harvesting efficiency, this paper shows the design of a two-degree-of-freedom (2-DOF) nonlinear piezoelectric energy harvester. The proposed harvest is realized by introducing magnetic attraction to a 2-DOF piezoelectric cantilever beam in order to broaden the energy harvesting bandwidth. Electromechanical equations describing this nonlinear system are presented. The simulation results confirmed the advantage of this new 2-DOF nonlinear harvester. Performance comparison shows that the 2-DOF nonlinear harvester has much higher energy harvesting efficiency than a conventional one-degree-of-freedom (1-DOF) nonlinear one.