A piezoelectric multilayer-stacked hybrid actuation/transduction system

摘要

A piezoelectric multilayer-stacked hybrid actuation/transduction system (stacked-HYBATS) is reported in this letter. It uses synergetic contributions from positive-strain and negative-strain piezoelectric multilayer-stacks to give displacements of about 3.5 times those of the same-sized piezoelectric flextensional actuator/transducer. The resonance of a stacked-HYBATS is enhanced comparing with that of actuators with either stack alone. The effective piezoelectric coefficient of the stacked-HYBATS is 2.5×10~6 pm/V at the resonance frequency and 1.5×10~5 pm/V at off-resonance frequencies. The stacked-HYBATS provides an approach for high performance electromechanical devices.