Analysis of High-Performance Piezoelectric Actuator Dynamics at Low Temperature

The performance of piezoelectric actuators can be significantly degraded when used in low-temperature conditions. To address this issue, in this article, we present a high-performance piezoelectric actuator with a relatively high coefficient of thermal expansion. This actuator is capable of dynamically adjusting the preload force with temperature. The article begins with thermodynamic simulations using Abaqus to analyze the impact of temperature on the clearance between the drive's foot and the guide. Subsequently, a dynamic model of the piezoelectric actuator is developed in Simulink to examine the influence of key parameters on drive displacement using parameter identification techniques. Finally, validating the reduction of the preload force is crucial for enhancing the actuator's performance by experiment, and low-temperature conditions have a significant 7.3-fold improvement compared to room temperature conditions with displacement. This research provides a theoretical and experimental foundation for effectively utilizing piezoelectric actuators in extremely low-temperature environments.