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公开(公告)号：HK1022370A1
公开(公告)日：2000-08-04
申请号：HK00101233
申请日：2000-02-29
Applicant: IBM
Inventor： SRI SHARMA ARUN MUTHUTHAMBY SR , HIEN PHU DANG , NAOYUKI KAGAMI , YUZO NAKAGAWA , AKIRA TOKIZONO , ISAO YONEDA
Abstract: Methods and systems for detecting and correcting for undesirable vibrations impacting the servo systems in data storage devices. A detection technique is provided wherein a detection filter is configured to scan a position signal of the servo system across a range of frequencies, and, at each respective scanned frequency, record an amplitude associated therewith. The recorded amplitudes are examined to determine whether any exceed a threshold, thereby locating a peak frequency of the vibration. Using the detected peak frequency of the vibration, a corrective filter is configured to operate about the peak frequency of vibration, thereby reducing its impact on the position signal in the servo system. Optimum detection and correction filter structures are disclosed, as are techniques for addressing filter state vectors as initial conditions as the corrective filters are repeatedly engaged during successive settle-out and track follow cycles (between seeks), as are continuous adaptation techniques for changing vibration environments.
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公开(公告)号：MY110153A
公开(公告)日：1998-02-28
申请号：MYPI19930502
申请日：1993-03-19
Applicant: IBM
Inventor： SATOSHI YAMAMOTO , TETSUO UEDA , ISAO YONEDA
Abstract: REDUCTION OF NOICE AND POWER CONSUMPTION DURING A SEEK OPERATION ARE ACHIEVED.MPU (8) DETERMINES WHETHER A MOVING SPEED OF A HEAD (1) IS WITHIN A PREDETERMINED RANGE INCLUDING A TARGET SPEED DURING A PERIOD FROM A TIME AT WHICH THE MOVING SPEED OF THE HEAD REACHES THE TARGET SPEED TO A PREDETERMINED TIME AT WHICH A DECELERATION OF THE HEAD IS STARTED. IF THE DETERMINATION IS YES, A CURRENT SUPPLIED TO A VOICE COIL MOTOR (2) IS TURNED OFF BY A MOTOR DRIVER (11). IF THE DETERMINATION IS NO, A CURRENT IS SUPPLIED TO THE VOICE COIL MOTOR (2) BY THE MOTOR DRIVER (11).(FIG 1)
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