Simulation of Piezoelectric Stack Actuators for Loss Component

Piezoelectric actuators (PEA) are widely utilized now for ultra-precision positioning and actuation in the micro/nanotechnology manufacturing industry. To ensure that these devices perform efficiently and to improve the system and prevent unnecessary inaccuracies it may trigger, it is better to understand its loss phenomenology. Piezoelectric devices have three losses: dielectric, mechanical, and piezoelectric. In this study, behaviour of PEA was simulated using COMSOL Multiphysics to characterize each loss and determine its effect on mechanical response, electrical impedance and percentage loss. The quality factor of the PEA was also calculated with different combined loss. The simulation study showed that each loss has its own influence on the said constituents especially over the frequency sweep. It was also proved that resonant frequency is invariant to the losses, thus, making it an extensive property of the PZT material. © 2021 School of Science, IHU. All Rights Reserved.