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A rotational actuator based on the piezoelectric bimorph
Author(s): Shuidong Jiang; Lei Liu; Yangqing Hou; Houfei Fang
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Paper Abstract

With the advancing of reflectarray antenna technology, a rotational actuator is desired to enable the beam scanning capability. The anticipated characteristics of this actuator include small volume, low energy consumption, easy to control, fast response, high reliability, and etc. The actuator developed by this study is composed of bimorphs and microgears. It can rotate clockwise and counterclockwise alternately by varying the applied voltage. The most prominent advantage of this actuator is that it only requires feed forward control which is easy to implement. It doesn’t need feedback control, as other actuators do, with no accumulative errors for its positioning application. This study has optimized the geometry of this actuator using the multi-physics coupling finite element method (FEM) software. The components of this actuator have been fabricated by micro-electric-mechanical-system (MEMS) fabrication process and precise machining technology. Glass fiber reinforced composited (GFRC) and Lead Zirconium Titanate (PZT) materials are used to fabricate the bimorph. The copper and stainless steel are used to fabricate the housing and gear, respectively. Several actuators have been assembled and tested to investigate the characteristics of this actuator. A test set up has been developed to measure the relationship between the rotation angle and the applied voltage. A fast camera has been employed to experimentally assess the response time, repeatability, stability and etc. Finally, the experimental results are correlated with the analysis results.

Paper Details

Date Published: 27 March 2018
PDF: 10 pages
Proc. SPIE 10598, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2018, 105981D (27 March 2018); doi: 10.1117/12.2294966
Show Author Affiliations
Shuidong Jiang, Shanghai YS Information Technology Co., Ltd. (China)
Lei Liu, Shanghai YS Information Technology Co., Ltd. (China)
Yangqing Hou, Shanghai YS Information Technology Co., Ltd. (China)
Houfei Fang, Shanghai YS Information Technology Co., Ltd. (China)


Published in SPIE Proceedings Vol. 10598:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2018
Hoon Sohn, Editor(s)

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