Power Generation And Shunt Damping Performance Of A Single Crystal Lead Magnesium Niobate-lead Zirconate Titanate Unimorph: Analysis And Experiment

摘要

This letter investigates the power generation and shunt damping performance of the single crystal piezoelectric ceramic lead magnesium niobate-lead zirconate titanate (PMN-PZT) analytically and experimentally. PMN-PZT is a recently developed interface for energy harvesting and shunt damping with its large piezoelectric constant (-2252 pm/ V) and coupling coefficient (0.95) for the transverse piezoelectric mode. A unimorph PMN-PZT cantilever with an aluminum substrate is tested under base excitation and its electromechanical response is predicted with a coupled distributed parameter model. The power generation performance of the device is 138 μW/(g~2 cm~3) at 1744 Hz, causing 84% tip vibration attenuation due to the resistive shunt damping effect.