Modeling and Simulation Analysis of a Two-degree-of-Freedom Nonlinear Piezoelectric Energy Harvester

摘要

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.