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2004 Fiscal Year Final Research Report Summary

Development of a numerical simulation system for flying hend slider design in magnetic disk storage with recording density

Research Project

Project/Area Number 14350086
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 設計工学・機械要素・トライボロジー
Research InstitutionKansai University

Principal Investigator

HAYASHI Takefumi  Kansai University, Faculty of Informatics, Professor, 総合情報学部, 教授 (90268326)

Co-Investigator(Kenkyū-buntansha) MITSUYA Yasunaga  Nagoya University, Dept.of Micro System Engineering, Professor, 大学院・工学研究科, 教授 (10200065)
ITO Toshihide  Kansai University, Faculty of Informatics, Professor, 総合情報学部, 教授 (30213060)
DEN Shisei  Matsushita Electric Industrial Co.Ltd., R & D Center, Senior Researcher, AVC商品開発研究所, 主任技師(研究職)
Project Period (FY) 2002 – 2004
KeywordsMagnetic Disk Storage / Dynamic Gas-Lubricated Slider Bearing / Head-Medium Interface / Gas-Film Lubrication / Mixed Averaging Method / Numerical Simulation / Flying Head Slider / Trioblogy
Research Abstract

In the head-medium interface design of a magnetic disk drive, a new mixed roughness averaging theory was introduced and implemented into the molecular gas lubrication equation. A dynamic simulation system which can take the texture pattern of arbitrary form into consideration was realized based on the results.
To calculate dynamic characteristics of a head slider on surface texture patterns which is composed of several geometrical shapes, the unit roughness model is modified and applied to the molecule gas lubrication equation. Moreover, the effect of the texture pattern is pre-calculated and compiled a flow coefficient database. This enables the calculation of pressure distribution of a bearing area when mixed texture patterns pass through.
The developed simulation system enables rapid and efficient calculation while changing parameters that affect the numerical solution of the lubrication equation and the equation of slider motion. Especially, when the pressure solution diverges, the system rewinds several time steps and retries the calculation with modified parameters. Therefore, it can adjust parameters efficiently without recalculating from the beginning. Furthermore, the binocular stereo graphics is introduced as a display system to improve the human interface of the system. The parameter of the optimal stereo projection was clarified based on evaluation of human visual perception.
Using the system developed in the present research, the static and dynamic flying characteristics of the typical sliders (taper-flat type, negative-pressure type and step-pad type) on a patterned disk surface were demonstrated. It is thought that the result of this research is effective in the design of the flying head slider and the texture patterned disk for the next generation of high-density recording magnetic disk storage.

  • Research Products

    (16 results)

All 2005 2004 2003

All Journal Article (12 results) Book (4 results)

  • [Journal Article] Flying Characteristics of Head Sliders on Patterned Disk Surfaces2005

    • Author(s)
      T.Hayashi, H.Yoshida, Y.Mitsuya
    • Journal Title

      Proceedings of the FMHDDT 2005 (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Development of A Numerical Simulation System to Evaluate Flying Characteristics of Head Sliders for Magnetic Disk Storage2005

    • Author(s)
      H.Yoshida, T.Hayashi
    • Journal Title

      Proceedings of the World Tribology Congress 3(印刷中)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 時間項を含む分子気体潤滑方程式の数値計算法に関する研究2005

    • Author(s)
      吉田英代, 林武文
    • Journal Title

      関西大学総合情報学部紀要「情報研究」 23(印刷中)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Off-Axis法を用いたステレオグラフィックスの奥行き感に関する研究2005

    • Author(s)
      山路真有, 林武文
    • Journal Title

      関西大学総合情報学部紀要「情報研究」 23(印刷中)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Flying Characteristics of Head Sliders on Patterned Disk Surfaces2005

    • Author(s)
      T.Hayashi, H.Yoshida, Y.Mitsuya
    • Journal Title

      Proceedings of the FMHDDT 2005 (in print)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Development of A Numerical Simulation System to Evaluate Flying Characteristics of Head Sliders for Magnetic Disk Storage2005

    • Author(s)
      H.Yoshida, T.Hayashi
    • Journal Title

      Proceedings of the World Tribology Congress 3 (in print)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Numerical Analysis of a Time Dependent Molecular Gas Film Lubrication Equation (in Japanese)2005

    • Author(s)
      H.Yoshida, T.Hayashi
    • Journal Title

      Journal of Informatics 23 (in print)

      Pages: 1-25

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Depth Perception in Stereo Graphics Using Off-Axis Projection (in Japanese)2005

    • Author(s)
      M.Yamaji, T.Hayashi
    • Journal Title

      Journal of Informatics 23 (in print)

      Pages: 1-24

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Formation of lubricant "sierra" a t boundary between perfluoropolyether solution dipped and undipped zones over diamond like carbon coated magnetic disks2004

    • Author(s)
      Y.Mitsuya, et al.
    • Journal Title

      Tribology Letters 16

      Pages: 43-50

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] ファイバーウォブリング法によるナノ閉じ込めされた分子潤滑膜の粘弾性特性の測定2004

    • Author(s)
      三矢保永, 他3名
    • Journal Title

      日本機械学会論文誌(C編) 70-691

      Pages: 233-240

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Formation of lubricant "sierra" at boundary between perfluoropolyether solution dipped and undipped zones over diamond like carbon coated magnetic disks2004

    • Author(s)
      Y.Mitsuya, K.Goto, Y.Hayashi
    • Journal Title

      Tribology Letters 16

      Pages: 43-50

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Measurement of nanorheological Properties of Molecularly Thin Confined Lubricant Film Using Fiber Wobbling Method2004

    • Author(s)
      S.Ito, K.Fukuzawa, H.Zhang, Y.Mitsuya
    • Journal Title

      Transactions of JSME 70, 691

      Pages: 233-240

    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] JAVA3Dによる3次元CGプログラミング2005

    • Author(s)
      林武文, 吉田英代
    • Total Pages
      160
    • Publisher
      コロナ社
    • Description
      「研究成果報告書概要(和文)」より
  • [Book] 3D-CG Programming Using Java 3d2005

    • Author(s)
      T.Hayashi, H.Yoshida
    • Total Pages
      160
    • Publisher
      CORONA PUBLISHING CO.,LTD (in press)
    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] OpenGLによる3次元CGプログラミング2003

    • Author(s)
      林武文, 加藤清敬
    • Total Pages
      160
    • Publisher
      コロナ社
    • Description
      「研究成果報告書概要(和文)」より
  • [Book] 3D-CG Programming Using OpenGL2003

    • Author(s)
      T.Hayashi, K.Kato
    • Total Pages
      160
    • Publisher
      CORONA PUBLISHING CO.,LTD
    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2006-07-11  

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