发明名称 |
Method and disk drive for improving head position accuracy during track following through real-time identification of external vibration |
摘要 |
The present invention may be embodied in a method and a disk drive for improving head position accuracy during track following through real-time identification of external vibration. A selected track is followed using a servo control loop having a nominal gain and being responsive to position error signal samples generated based on a difference between head position samples and a reference head position value. A spectral power value within a predetermined frequency band is determined from a sequence of the position error signal samples. If a property of the spectral power value exceeds a threshold, the gain of the servo control loop is increased within the predetermined frequency band to attenuate the effect of external vibration on the position of the head over the selected track during track following.
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申请公布号 |
US6693764(B1) |
申请公布日期 |
2004.02.17 |
申请号 |
US20010775256 |
申请日期 |
2001.01.31 |
申请人 |
WESTERN DIGITAL TECHNOLOGIES, INC. |
发明人 |
SHEH EDGAR D.;MELKOTE HEMANT;AGARWAL VINAY K. |
分类号 |
G11B5/596;(IPC1-7):G11B5/596 |
主分类号 |
G11B5/596 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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