モード切り換え型制御系の初期値補償設計と磁気ディスク装置ヘッド位置決めサーボ系への適用 Design of Initial Value Compensation for Mode Switching Controller and Its Application to Magnetic Disk Drives

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In the many magnetic disk drives, several servo controllers are switched from one to another to perform one servo action. This type of servo controller is called a mode switching controller and obtains fast access and accurate positioning. The authors previously proposed a basic idea of applying initial value compensation method to the mode switching controller at switching in order to improve transient characteristics.<br>In this paper, an actual design method for applying to a head positioning servo of magnetic disk drives are shown. Zeros of the transfer function between state variables of the plant and a controlled variable (head position) can be relocated by injecting a suitable values to the state variables of the compensator at mode switching. These values are calculated by using detected plant state variables at switching. Therefore the relocated zeros can cancel some undesirable poles and this improves transient characteristics with no influence on a closed loop stability. In the case that the detected plant variables have some errors, a complete pole-zero cancellation is not obtained. In the practical way of avoiding this problem, a specified servo mode is added between fast access mode and accurate positioning mode, whose poles are assigned not to include slow modes. By combining this mode with the initial value compensation method, fast transient with less overshoot can be obtained. Finally some experimental results are shown.

収録刊行物

  • 計測自動制御学会論文集  

    計測自動制御学会論文集 31(6), 780-788, 1995-06 

    The Society of Instrument and Control Engineers

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被引用文献:  28件

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各種コード

  • NII論文ID(NAID)
    10002484547
  • NII書誌ID(NCID)
    AN00072392
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    04534654
  • NDL 記事登録ID
    3607281
  • NDL 刊行物分類
    M045(制御工学)
  • NDL 雑誌分類
    ZM11(科学技術--科学技術一般--制御工学)
  • NDL 請求記号
    Z14-482
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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