Piezoelectric Actuators: Control Applications of Smart Materials / Edition 1

by Seung-Bok Choi, Young-Min Han

Overview

Currently, many smart materials exhibit one or multifunctional capabilities that are being effectively exploited in various engineering applications, but these are only a hint of what is possible. Newer classes of smart materials are beginning to display the capacity for self-repair, self-diagnosis, self-multiplication, and self-degradation. Ultimately, what will make them practical and commercially viable are control devices that provide sufficient speed and sensitivity. While there are other candidates, piezoelectric actuators and sensors are proving to be the best choice.

Piezoelectric Actuators: Control Applications of Smart Materials details the authors’ cutting-edge research and development in this burgeoning area. It presents their insights into optimal control strategies, reflecting their latest collection of refereed international papers written for a number of prestigious journals.

Piezoelectric materials are incorporated in devices used to control vibration in flexible structures. Applications include beams, plates, and shells; sensors and actuators for cabin noise control; and position controllers for structural systems such as the flexible manipulator, engine mount, ski, snowboard, robot gripper, ultrasonic motors, and various type of sensors including accelerometer, strain gage, and sound pressure gages.

The contents and design of this book make it useful as a professional reference for scientists and practical engineers who would like to create new machines or devices featuring smart material actuators and sensors integrated with piezoelectric materials. With that goal in mind, this book:

• Describes the piezoelectric effect from a microscopic point of view
• Addresses vibration control for flexible structures and other methods that use active mount
• Covers control of flexible robotic manipulators
• Discusses application to fine-motion and hydraulic control systems
• Explores piezoelectric shunt technology

This book is exceptionally valuable as a reference for professional engineers working at the forefront of numerous industries. With its balanced presentation of theory and application, it will also be of special interest to graduate students studying control methodology.

Product Details

ISBN-13:	9781439818084
Publisher:	Taylor & Francis
Publication date:	04/16/2010
Pages:	276
Product dimensions:	6.30(w) x 9.30(h) x 0.80(d)

About the Author

Seung-Bok Choi received his Ph.D. in mechanical engineering from Michigan State University, East Lansing, in 1990. Since 1991, he has been a professor at Inha University, Incheon, South Korea. His current research interests include the design and control of functional structures and systems utilizing smart materials such as electrorheological and magnetorheological fluids, piezoelectric materials, and shape memory alloys. He is the author of over 250 archival international journal and book contributions, and 170 international conference publications. He is currently serving as the associate editor of the Journal of Intelligent Material Systems and Structures and Smart Materials and Structures, and is a member of the editorial board of the International Journal of Vehicle Autonomous Systems and the International Journal of Intelligent Systems Technologies and Applications.

Young-Min Han received his Ph.D. in mechanical engineering from Inha University, Incheon, South Korea, in 2005. Since 2006, he has been a research professor at Inha University. His current research interest includes the design and control of functional mechanisms utilizing smart materials such as active mounts, dispensing systems, shock absorbers, robotic manipulators, and human-machine interfaces. Dr. Han is the author of over 30 international journal papers and 20 international conference proceedings.

Table of Contents

Preface ix

Authors xiii

Chapter 1 Introduction 1

1.1 Piezoelectric Effect 1

1.2 General Requirements for Control Devices 3

Chapter 2 Control Strategies 7

2.1 Introduction 7

2.2 PID Control 7

2.3 LQ Control 8

2.4 Sliding Mode Control 11

2.5 H Control 13

2.6 QFT Control 16

2.7 Inverse Model Control 19

References 22

Chapter 3 Vibration Control of Flexible Structure 23

3.1 Vibration Control of Beam Structures 23

3.1.1 Introduction 23

3.1.2 Dynamic Modeling 24

3.1.3 Controller Formulation 27

3.1.3.1 General Formulation 27

3.1.3.2 Application to the Structure 29

3.1.4 Control Results 32

3.1.5 Some Final Thoughts 36

3.2 Vibration Control of Hull Structures 37

3.2.1 Introduction 37

3.2.2 Dynamic Modeling 39

3.2.3 Modal Analysis 41

3.2.4 Controller Formulation 44

3.2.5 Control Results 45

3.2.6 Some Final Thoughts 48

3.3 Vibration Control Using Piezostack Mount 49

3.3.1 Introduction 49

3.3.2 Mount Design 50

3.3.3 System Modeling and Analysis 51

3.3.4 Controller Formulation 53

3.3.5 Control Results 57

3.3.6 Some Concluding Comments 60

References 62

Chapter 4 Vibration Control Using Active Mount 65

4.1 One-Axis Active Mount 65

4.1.1 Introduction 65

4.1.2 Design and Modeling 66

4.1.3 Controller Formulation 76

4.1.4 Control Results 78

4.1.5 Some Concluding Comments 83

4.2 Three-Axis Active Mount 83

4.2.1 Introduction 83

4.2.2 Parameter Identification 85

4.2.2.1 The Rubber Element 85

4.2.2.2 The Piezoelectric Actuator 86

4.2.3 Dynamic Modeling 88

4.2.4 Controller Formulation and Results 93

4.2.5 Some Concluding Comments 100

References 102

Chapter 5 Control of Flexible Robotic Manipulators 105

5.1 Two-Link Flexible Manipulator 105

5.1.1 Introduction 105

5.1.2 Dynamic Modeling 106

5.1.3 Controller Formulation 110

5.1.3.1 Sliding Mode Controller 110

5.1.3.2 Constant Amplitude Controller 111

5.1.4 Control Responses 113

5.1.5 Some Final Thoughts 116

5.2 Flexible Gantry Robot 117

5.2.1 Introduction 117

5.2.2 System Modeling 118

5.2.2.1 Bidirectional ER Clutch Actuator 118

5.2.2.2 Modeling of Flexible Gantry Robort System 121

5.2.3 Controller Formulation 125

5.2.4 Control Responses 129

5.2.5 Some Final Thoughts 131

References 135

Chapter 6 Application to Fine Motion Control System 137

6.1 Optical Pickup Device 137

6.1.1 Introduction 137

6.1.2 Modeling and Mechanism Design 138

6.1.3 Controller Formulation 141

6.1.4 Control Results 145

6.1.5 Some Concluding Comments 147

6.2 Dual-Servo Stage 147

6.2.1 Introduction 147

6.2.2 Modeling and Mechanism Design 151

6.2.2.1 Coarse Motion Stage 151

6.2.2.2 Fine Motion Stage 155

6.2.3 Controller Formulation 158

6.2.4 Control Results 162

6.2.5 Some Concluding Comments 165

References 167

Chapter 7 Application to Hydraulic Control System 171

7.1 Piezoactuator-Driven Pump 171

7.1.1 Introduction 171

7.1.2 Pump Design and Analysis 172

7.1.3 Controller Formulation 176

7.1.4 Control Results 179

7.1.5 Some Concluding Comments 181

7.2 Piezoactuator-Driven Jetting Dispenser 182

7.2.1 Introduction 182

7.2.2 Mechanism Design 184

7.2.3 Dynamic Modeling 185

7.2.4 Controller Formulation and Responses 195

7.2.5 Some Concluding Comments 203

References 203

Chapter 8 Piezoelectric Shunt Technology 205

8.1 Vibration Control of CD-ROM Devices 205

8.1.1 Introduction 205

8.1.2 Shunt Circuit Design 206

8.1.3 Implementation and Analysis 210

8.1.3.1 Dynamic Characteristics of the CD-ROM Drive Base 210

8.1.3.2 Admittance Analysis of the CD-ROM Drive Base with Piezoelectric Patches 212

8.1.4 Shunt Responses 216

8.1.5 Some Final Thoughts 218

8.2 Vibration Control of the HDD Disk-Spindle System 221

8.2.1 Introduction 221

8.2.2 Modal Analysis 225

8.2.3 Shunt Circuit Design 230

8.2.4 Analysis and Optimization 240

8.2.4.1 Admittance Analysis 240

8.2.4.2 Sensitivity Analysis for Optimal Design 243

8.2.5 Implementation and Results 247

8.2.6 Some Final Thoughts 252

References 253

Index 257