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Technical Briefs

Cylindrical Shell Control With Center- and Corner-Placed Photostrictive Skew-Quad Actuator Systems

[+] Author and Article Information
J. Jiang

 School of Mechatronic Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, Chinajj–03@163.comDepartment of Mechanical Engineering, StrucTronics Lab,  University of Kentucky, Lexington, KY 40506-0503 e-mail: hstzou@engr.uky.edujj–03@163.com

H. H. Yue, Z. Q. Deng

 School of Mechatronic Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, Chinablock@hit.edu.cnDepartment of Mechanical Engineering, StrucTronics Lab,  University of Kentucky, Lexington, KY 40506-0503 e-mail: hstzou@engr.uky.edublock@hit.edu.cn

H. S. Tzou

 School of Mechatronic Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, ChinaDepartment of Mechanical Engineering, StrucTronics Lab,  University of Kentucky, Lexington, KY 40506-0503 e-mail: hstzou@engr.uky.edu

J. Vib. Acoust 134(2), 024503 (Jan 18, 2012) (5 pages) doi:10.1115/1.4005023 History: Received August 25, 2010; Revised July 12, 2011; Published January 18, 2012; Online January 18, 2012

Light-driven photostrictive actuators can induce control actions for wireless non-contact actuation and control of precision structures and systems. Conventional distributed actuators laminated on shells and plates usually only introduce uniform control forces and moments. Structural actuation and control based on uniform control forces and moments have been investigated for over two decades. This paper is to exploit a new photostrictive actuator design, i.e., a skew-quad (SQ) actuator system. This new distributed SQ actuator system laminated on shells and plates can introduce non-uniform control forces and moments. The new SQ actuator system is composed of four pieces of photostrictive materials and the inner two edges of each piece are bonded to a cross fixture. Under the irradiation of high-energy lights, each piece generates non-uniform control forces and moments, due to its uneven non-symmetrical boundary conditions. Modal actuation characteristics of a cylindrical shell coupled with the center-placed and corner-placed SQ actuator systems are evaluated respectively. A paired-design regulating positive/negative control forces of each actuator region is also proposed and evaluated to improve the control effectiveness of the center-located SQ actuator system. Parametric analysis proves improved control effectiveness of unsymmetrical shell modes.

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Copyright © 2012 by American Society of Mechanical Engineers
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Figures

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Figure 1

Photostictive actuator with fixed-fixed-free-free boundary conditions

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Figure 2

A new skew-quad photostrictive actuator system

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Figure 3

A cylindrical shell attached with the skew-quad (SQ) actuator system

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Figure 4

Control action versus length ratio of the center-located SQ actuator system

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Figure 5

Control action versus length ratio of the corner-located SQ actuator system

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Figure 6

A cylindrical shell attached with one pair of skew-quad actuator systems

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Figure 7

Control action versus length ratio of the paired center-located SQ actuator system

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