Piezoelectrics & Acoustooptics, Volume. 47, Issue 1, 129(2025)
Analysis of Displacement Loss Factors in Piezoelectric Ceramic Stack Actuators Under High-Stiffness Load
The displacement output characteristics of a piezoelectric stack micropositioner under high-stiffness load were measured, revealing that the output displacement is notably lower than expected. This displacement initially increases and then decreases as preload increases. It was found that under high-stiffness load and low preload, the mechanical contact stiffness between the piezoelectric stack and the load is of the same order of magnitude as the stack stiffness. This reduces the effective stiffness of the driving end, leading to displacement loss. As preload increases, non-180° domain reorientation within the piezoelectric stack enhances the piezoelectric effect, and mechanical contact stiffness increases until it reaches its limit. However, at higher loads, the piezoelectric coefficient of the stack decreases rapidly owing to depolarization. Overall, the micropositioner exhibits significant displacement loss, with displacement reaching its peak at a specific preload owing to the combined influence of these two factors.
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ZHANG Duanqin, YANG Wentao, ZHANG Jinghang, CHEN Yaoyao, LIU Xuling. Analysis of Displacement Loss Factors in Piezoelectric Ceramic Stack Actuators Under High-Stiffness Load[J]. Piezoelectrics & Acoustooptics, 2025, 47(1): 129
Received: Sep. 11, 2024
Accepted: Apr. 17, 2025
Published Online: Apr. 17, 2025
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