Piezoelectric ring-stack actuator characterization and modeling for high-bandwidth application

Seth P. Pietrowski; Andres M. Rodriguez; Carlos Hernandez; Jeffrey L. Kauffman

doi:10.1117/12.2658625

18 April 2023 Piezoelectric ring-stack actuator characterization and modeling for high-bandwidth application

Seth P. Pietrowski, Andres M. Rodriguez, Carlos Hernandez, Jeffrey L. Kauffman

Proceedings Volume 12484, Behavior and Mechanics of Multifunctional Materials XVII; 1248408 (2023) https://doi.org/10.1117/12.2658625
Event: SPIE Smart Structures + Nondestructive Evaluation, 2023, Long Beach, California, United States

Abstract

Piezoelectric materials are excellent actuator candidates due to their high frequency bandwidth. However, hysteresis and nonlinear material effects can reduce their overall performance, particularly when driven at high amplitudes and high frequencies. Of interest here is an application for high-frequency actuation. The demand for actuation authority requires careful characterization and accurate modeling of the piezoelectric actuator dynamics to ensure the intended performance. This paper presents such a characterization of a ring-shaped piezoelectric stack actuator. A series of experiments is presented to explore the ring stack actuator’s response both under free boundary conditions and with spring-applied preloads. Fixed voltage tests conducted confirm the expected quasi-static response, while oscillatory tests exhibit dynamics that impact response at higher frequencies. Preload stiffnesses appear to minimally change the nominal displacement observed compared to the baseline, no-load case. While the preloads were small, the actuator showed qualitatively similar performance for the unloaded and several loaded cases.

Conference Presentation

Citation Download Citation

Seth P. Pietrowski, Andres M. Rodriguez, Carlos Hernandez, and Jeffrey L. Kauffman "Piezoelectric ring-stack actuator characterization and modeling for high-bandwidth application", Proc. SPIE 12484, Behavior and Mechanics of Multifunctional Materials XVII, 1248408 (18 April 2023); https://doi.org/10.1117/12.2658625

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