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研究生:劉柏清
研究生(外文):Po-Ching Liu
論文名稱:使用壓電彎片於近場光碟機的飛行高度控制
論文名稱(外文):Flying Height Control for Near-Field Optical Disk Drives Using Piezoelectric Bender
指導教授:呂宗熙
指導教授(外文):Tzong-Shi Liu
學位類別:碩士
校院名稱:國立交通大學
系所名稱:機械工程系
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:英文
中文關鍵詞:壓電彎片近場光碟機飛行高度
外文關鍵詞:Piezoelectric BenderNear-Field Optical Disk DriveFlying Height
相關次數:
  • 被引用被引用:2
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近場光碟機利用近場光學的技術,使得飛行讀寫頭得以突破繞射極限,增加資料的儲存容量以及密度。然而,讀寫頭的控制效能有待增強。本研究中應用壓電彎片取代在一般讀寫頭上的撓片設計,並執行系統鑑別求得壓電彎片的數學模型。為了即時控制,藉著DSP控制器的高速運算,並以雙光束雷射都卜勒干涉儀作為感測器,使用PID 控制方法達成壓電彎片的飛行運動控制,在近場光碟片以5400rpm轉動時,儘管碟片變形而且飛行讀寫頭振動,都保持著穩定的飛行高度。
Based on near-field optics, a flying pickup head is employed in optical disk drives, so as to increase data storage capacity and density. However, it remains to enhance flying height control performance of the pickup head. This study attaches a piezoelectric bender to the pickup head. System identification is carried out to obtain a transfer function as the plant model. For real-time control, this study uses a DSP motion control card to execute control algorithm and uses a double-beam laser doppler interferometer for sensing head-disk spacing. A PID control method deals with the PZT bender motion to maintain a stable flying height, in spite of optical disk deformation and flying head vibration during near-field disk rotation at 5400rpm.
ABSTRACT (in Chinese)..................................I
ABSTRUCT (in English).................................II
Acknowledgement......................................III
TABLE OF CONTENTS.....................................IV
LIST OF FIGURE........................................VI
LIST OF TABLES........................................IX
CHAPTER 1 INTRODUCTION................................1
1.1 Literature Survey...............................1
1.2 Objective and Scope.............................2
CHAPTER 2 NEAR-FIELD OPTICAL DISK DRIVE...............3
2.1 Introduction to Near-Field Optics...............3
2.2 Structure and Development.......................3
CHAPTER 3 PZT VIBRATION MEASUREMENT...................5
3.1 Bending Displacement............................5
3.2 Neutral Axis Deformation........................6
CHAPTER 4 SYSTEM IDENTIFICATION.......................8
4.1 Experimental Setup for PZT......................8
4.2 Swept Sine Measurement..........................8
4.3 MATLAB Simulation..............................10
CHAPTER 5 PZT CONTROLLER DESIGN......................12
5.1 Reference Input Signal Measurement.............12
5.3 Controller Design..............................13
5.4 Simulation.....................................14
5.2 Control Experiment.............................15
CHAPTER 6 CONCLUSION.................................18
REFERENCES............................................20
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