ハードディスクドライブのヘッド位置決め制御系におけるディスクフラッタ振動の補償方式

カテゴリ: 論文誌(論文単位)

グループ名: 【D】産業応用部門

発行日: 2012/12/01

タイトル(英語): Compensation for Disk-Flutter Vibrations of Head-Positioning Control Systems in Hard Disk Drives

著者名: 熱海　武憲（（株）日立製作所 日立研究所），藪井　将太（（株）日立製作所 日立研究所）

著者名(英語): Takenori Atsumi (Hitachi Research Laboratory, Hitachi, Ltd.), Shota Yabui (Hitachi Research Laboratory, Hitachi, Ltd.)

キーワード: ハードディスクドライブ，位置決め制御系，振動制御，過渡応答，ディスクフラッタ　　hard disk drives，positioning control，vibration control，residual response，disk flutter

要約(英語): In a head-positioning control system of a hard disk drive, the head-positioning accuracy is worsened because of the airflow-induced vibration of disks (called “disk flutter”). Therefore, the control system must compensate for the disk-flutter-induced positioning error. In this paper, we propose a new framework of the head-positioning control system using a resonant filter to suppress the disk-flutter-induced positioning error. The control system uses resonant filters with variable gains that depend on the cylinder number of the head position and the modal shape of the flow-induced vibration of disks. The resonant filter can obtain a circular vector locus that recedes from the unstable point on the Nyquist diagram and can decrease the sensitivity function's gain at a specific frequency. The variable gains are optimized depending on the cylinder number of the head position. As a result, the resonant filter is able to improve the transient response after track-seeking control. The result of track-seeking simulations showed that the proposed method was effective in decreasing the positioning error caused by the disk-flutter-induced vibration and improving the seek time of the hard disk drive.

本誌: 電気学会論文誌D（産業応用部門誌） Vol.132 No.12 （2012）

本誌掲載ページ: 1149-1158 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejias/132/12/132_1149/_article/-char/ja/