Experimental Measurements and Theoretical Analysis on Dynamic Characteristics of Piezoelectric Components
Date Issued
2004
Date
2004
Author(s)
Lin, Yu-Chih
DOI
zh-TW
Abstract
Experimental Measurements and Theoretical Analysis on Dynamic Characteristics of Piezoelectric Components
ABSTRACT
The investigation on the resonant characteristics of piezoelectric components both in the air and under liquids is very important because of the wide applications of piezoelectric material on sensor/actuator, communication, biomedical field, navigation, underwater exploration and national defense. Since it is difficult to get the mode shapes under liquids, the utilizing of AF-ESPI, which has the benefits of high resolution and clarity, can facilitate the under water resonant analysis.
In this dissertation, three experimental techniques, including AF-ESPI, LDV, and impedance analyzer, are adopted to obtain the vibration characteristics of piezoceramic components, such as disks, plates, composite laminates and bimorphs, in the air and under various liquids. The experimental results are compared with the FEM and analytical solutions. In addition, based on the coupling of mechanical and electrical fields of piezoelectric material, different designs of electrodes covered on the faces of the piezoelectric components will change the resonant characteristics of these components. The influences of electrode designs on resonant properties are also discussed in detail in this research. The results of the experimental and theoretical analysis are essentially in good agreement, and they provide complete information of the vibration characteristics of piezoelectric components in different kinds of media.
Subjects
振動
壓電陶瓷
電子斑點干涉術
piezoelectric
vibration
ESPI
Type
thesis
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