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[ pdf ] Cryogenic Piezoelectric Actuator

Cryogenic Piezoelectric Actuator Download
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Topic under  Precision measuring
Source: ntrs.nasa.gov 
File size: 3.17 MB
File type: pdf
Last download on: Sat Mar 25, 2017 02:40:12 PM
Short Desciption:
... actuator, cryogenic actuator 1. INTRODUCTION Electromechanical actuators with large stroke and high precision are ... Cryogenic displacement measurement results. (a) actuator ...

Summary:
In this paper, PMN-PT single crystal piezoelectric stack actuators and flextensional actuators were designed, prototyped and characterized for space optics applications. Single crystal stack actuators with footprint of 10 mm x10 mm and the height of 50 mm were assembled using 10 mm x10mm x0.15mm PMN-PT plates. These actuators showed stroke > 65 85 ?m at 150 V at room temperature, and > 30 ?m stroke at 77 K. Flextensional actuators with dimension of 10mm x 5 mm x 7.6 mm showed stroke of >50 ?m at room temperature at driving voltage of 150 V. A flextensional stack actuator with dimension of 10 mm x 5 mm x 47 mm showed stroke of ~ 285 ?m at 150 V at room temperature and > 100 ?m at 77K under driving of 150 V should be expected. The large cryogenic stroke and high precision of these actuators are promising for cryogenic optics applications.
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