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Distributed piezoelectric actuator with complex shape
Author(s)
Qiu, Yan
Date Issued
2002
Type
Thesis
Publisher
Peninsula Technikon
Abstract
Distributed Piezoelectric Actuator (DPA) is one kind of actuator in the smart technology
field. Firstly, DPA is one kind of solid-state actuator, and can be embedded in the
structure. Secondly, it can be controlled by the electrical signal with high bandwidth and
high precision. So it can be applied in the many different fields, such as high-resolution
positioning, noise and vibration detection and shape control.
Up to now, all of the DPA theory investigations and the product designs are based on
applying the approximate electrical field. And only the rectangular shape DPA has been
studied. The accurate distribution and intensity of electrical and mechanics field, and the
numerical imitation for the DPA products with rectangular and other shapes have never
been discussed and studied. Therefore, the development of DPA to be used in the micro
application, such as in the Micro Electro-Mechanical System (MEMS), has been limited.
This thesis has developed the analytical analysis models for two types of DPA elements
and the part circular shape DPA element. The MathCAD and MATLAB program have
been used to develop the analytical models. The ABAQUS program has also been used to
compare the results between the analytical models and Finite Element Method (FEM).
Finally, the accuracy and reliability of analytical models have been proved by results
comparison between the analytical models, FEM and the product testing data from the
industry.
This thesis consists of five chapters. Chapter 1 is the introduction of smart structure. The
characterizations of constituent materials, including the piezoelectric material and matrix
epoxy material have been discussed in Chapter 2. In Chapter 3, the analytical models for
two type of DPA element have been developed and the comparisons have also been
completed. The analytical models for part circular shape DPA element have been
developed in Chapter 4. The conclusions and recommendations are included in Chapter 5.
field. Firstly, DPA is one kind of solid-state actuator, and can be embedded in the
structure. Secondly, it can be controlled by the electrical signal with high bandwidth and
high precision. So it can be applied in the many different fields, such as high-resolution
positioning, noise and vibration detection and shape control.
Up to now, all of the DPA theory investigations and the product designs are based on
applying the approximate electrical field. And only the rectangular shape DPA has been
studied. The accurate distribution and intensity of electrical and mechanics field, and the
numerical imitation for the DPA products with rectangular and other shapes have never
been discussed and studied. Therefore, the development of DPA to be used in the micro
application, such as in the Micro Electro-Mechanical System (MEMS), has been limited.
This thesis has developed the analytical analysis models for two types of DPA elements
and the part circular shape DPA element. The MathCAD and MATLAB program have
been used to develop the analytical models. The ABAQUS program has also been used to
compare the results between the analytical models and Finite Element Method (FEM).
Finally, the accuracy and reliability of analytical models have been proved by results
comparison between the analytical models, FEM and the product testing data from the
industry.
This thesis consists of five chapters. Chapter 1 is the introduction of smart structure. The
characterizations of constituent materials, including the piezoelectric material and matrix
epoxy material have been discussed in Chapter 2. In Chapter 3, the analytical models for
two type of DPA element have been developed and the comparisons have also been
completed. The analytical models for part circular shape DPA element have been
developed in Chapter 4. The conclusions and recommendations are included in Chapter 5.
Additional information
Thesis (MTech (Mechanical Engineering))--Peninsula Technikon, Cape Town, 2002
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