Characterization of surface parallel mirror actuation using preloaded commercial lead zirconate titanate (PZT) stacks

Stewart Sherrit; Eric A. Guevara; Turner M. Bumbary; George L. Lamb; Diego W. Camacho; Carey L. Weisberg; Carlos Gross Jones; Will E. Krieger; Brian Monacelli; Scott A. Basinger; Erkin Sidick; David W. Miller; Keith Coste

doi:10.1117/12.3010058

9 May 2024 Characterization of surface parallel mirror actuation using preloaded commercial lead zirconate titanate (PZT) stacks

Stewart Sherrit, Eric A. Guevara, Turner M. Bumbary, George L. Lamb, Diego W. Camacho, Carey L. Weisberg, Carlos Gross Jones, Will E. Krieger, Brian Monacelli, Scott A. Basinger, Erkin Sidick, David W. Miller, Keith Coste

Author Affiliations +

Proceedings Volume 12949, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2024; 1294908 (2024) https://doi.org/10.1117/12.3010058
Event: SPIE Smart Structures + Nondestructive Evaluation, 2024, Long Beach, California, United States

Abstract

The next generation of space telescopes will require large, segmented apertures for observations in the near ultraviolet through mid- and far-infrared regions to enable new science ranging from exoplanet characterization to precision astronomical observations that refine astrophysics models. To meet these challenges, we are developing instrumented (strain gauge) surface parallel actuators (SPAs) that are robust and can meet the stringent requirements of mass and cost per m². We have developed a surface parallel mirror test piece and a set of flexured actuators that maintain compression in the piezoelectric stack elements at all times. The characterization work of these actuators is directed at understanding the performance of flexure piezoelectric multilayer stack actuator operation when embedded in the mirror. To determine the influence functions for each actuator position, we will report the measured stroke/strain and charge/capacitance versus voltage curves for all 42 preloaded actuators. Although designed to operate under close loop control via feedback from the strain gauge initial testing on bare lead zirconate titanate (PZT) stack actuators suggests that by driving the stack to a known domain state we could perform open loop control in the actuators to levels of ± 0.3 μm. We will also report on creep for the actuators and cross actuation for each unique actuator position as well as discuss approaches to mitigating the effect on open loop control error. Thermal studies of flextensional actuators embedded in analog rib structures down to 100K will also be presented.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Stewart Sherrit, Eric A. Guevara, Turner M. Bumbary, George L. Lamb, Diego W. Camacho, Carey L. Weisberg, Carlos Gross Jones, Will E. Krieger, Brian Monacelli, Scott A. Basinger, Erkin Sidick, David W. Miller, and Keith Coste "Characterization of surface parallel mirror actuation using preloaded commercial lead zirconate titanate (PZT) stacks", Proc. SPIE 12949, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2024, 1294908 (9 May 2024); https://doi.org/10.1117/12.3010058

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