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PIEZOELECTRIC LAMINATES FOR TORSIONA...

LEE, CHIH-KUNG.

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PIEZOELECTRIC LAMINATES FOR TORSIONAL AND BENDING MODAL CONTROL: THEORY AND EXPERIMENT.

Record Type:	Electronic resources : Monograph/item
Title/Author:	PIEZOELECTRIC LAMINATES FOR TORSIONAL AND BENDING MODAL CONTROL: THEORY AND EXPERIMENT./
Author:	LEE, CHIH-KUNG.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 1987,
Description:	213 p.
Notes:	Source: Dissertations Abstracts International, Volume: 48-07, Section: B.
Contained By:	Dissertations Abstracts International48-07B.
Subject:	Mechanics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=8724154

PIEZOELECTRIC LAMINATES FOR TORSIONAL AND BENDING MODAL CONTROL: THEORY AND EXPERIMENT.
LEE, CHIH-KUNG.

PIEZOELECTRIC LAMINATES FOR TORSIONAL AND BENDING MODAL CONTROL: THEORY AND EXPERIMENT. - Ann Arbor : ProQuest Dissertations & Theses, 1987 - 213 p.

Source: Dissertations Abstracts International, Volume: 48-07, Section: B.

Thesis (Ph.D.)--Cornell University, 1987.

This item must not be sold to any third party vendors.

In this dissertation, a piezoelectric laminate theory that uses piezoelectric phenomenon to effect distributed control and sensing of both bending and torsional vibration of a flexible torsion beam has been developed. This newly developed theory is capable of modeling the electro-mechanical and mechano-electrical behavior of a laminate. Emphasis is on the use of piezoelectric and ferroelectric property of the lamina to achieve both torsion as well as bending coupling between the applied voltage and the deformation in the torsion beam. This theory is applied to the commercially available polyvinylidene fluoride (PVDF) thin film which is used as the piezoelectric lamina. Four design parameters were adopted to design a series of PVDF sensors and actuators: (1) laminating different piezoelectric laminae, (2) changing the skew angle between the structure principal axes and the material axes of each lamina, (3) using the ferroelectric property of certain lamina to vary the polarization profile within the plane, and (4) reshaping the surface electrode pattern. A modal sensor of a beam which measures the modal coordinates on-line real time without any signal processing requirements has been invented. A distributed sensor which measures the twisting angle, the bending angle and the slope of the twisting angle at any point for a slender plate has also been created. From experimental data, it appears that a PVDF sensor is sensitive enough to detect small motions. PVDF bending/twisting actuators have also been fabricated. Experimental results indicated that PVDF actuators are suitable for micro-actuators. The experimental observations were successfully predicted by the piezoelectric laminate theory. The reciprocal relationships between PVDF sensors and actuators were unfolded. PVDF oscillators were studied to demonstrate the reciprocal relationships between PVDF sensors and actuators. Lyapunov's Direct Method was used to derive the control algorithms for a distributed parameter PVDF feedback control system.Subjects--Topical Terms:

525881
Mechanics.

PIEZOELECTRIC LAMINATES FOR TORSIONAL AND BENDING MODAL CONTROL: THEORY AND EXPERIMENT.
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008 201008s1987 ||||||||||||||||| ||eng d
035 $a (MiAaPQ)AAI8724154
035 $a AAI8724154
040 $a MiAaPQ $c MiAaPQ
100 1 $a LEE, CHIH-KUNG. $3 3434409
245 1 0 $a PIEZOELECTRIC LAMINATES FOR TORSIONAL AND BENDING MODAL CONTROL: THEORY AND EXPERIMENT.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 1987
300 $a 213 p.
500 $a Source: Dissertations Abstracts International, Volume: 48-07, Section: B.
500 $a Publisher info.: Dissertation/Thesis.
502 $a Thesis (Ph.D.)--Cornell University, 1987.
506 $a This item must not be sold to any third party vendors.
506 $a This item must not be added to any third party search indexes.
520 $a In this dissertation, a piezoelectric laminate theory that uses piezoelectric phenomenon to effect distributed control and sensing of both bending and torsional vibration of a flexible torsion beam has been developed. This newly developed theory is capable of modeling the electro-mechanical and mechano-electrical behavior of a laminate. Emphasis is on the use of piezoelectric and ferroelectric property of the lamina to achieve both torsion as well as bending coupling between the applied voltage and the deformation in the torsion beam. This theory is applied to the commercially available polyvinylidene fluoride (PVDF) thin film which is used as the piezoelectric lamina. Four design parameters were adopted to design a series of PVDF sensors and actuators: (1) laminating different piezoelectric laminae, (2) changing the skew angle between the structure principal axes and the material axes of each lamina, (3) using the ferroelectric property of certain lamina to vary the polarization profile within the plane, and (4) reshaping the surface electrode pattern. A modal sensor of a beam which measures the modal coordinates on-line real time without any signal processing requirements has been invented. A distributed sensor which measures the twisting angle, the bending angle and the slope of the twisting angle at any point for a slender plate has also been created. From experimental data, it appears that a PVDF sensor is sensitive enough to detect small motions. PVDF bending/twisting actuators have also been fabricated. Experimental results indicated that PVDF actuators are suitable for micro-actuators. The experimental observations were successfully predicted by the piezoelectric laminate theory. The reciprocal relationships between PVDF sensors and actuators were unfolded. PVDF oscillators were studied to demonstrate the reciprocal relationships between PVDF sensors and actuators. Lyapunov's Direct Method was used to derive the control algorithms for a distributed parameter PVDF feedback control system.
590 $a School code: 0058.
650 4 $a Mechanics. $3 525881
690 $a 0346
710 2 $a Cornell University. $3 530586
773 0 $t Dissertations Abstracts International $g 48-07B.
790 $a 0058
791 $a Ph.D.
792 $a 1987
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=8724154