发明名称 |
Disk drive having a servo control system optimized for faster determination of repeatable runout correction values and related method |
摘要 |
A disk drive is disclosed having a servo control system optimized for faster determination of repeatable runout (RRO) correction values. Each circumferential track on a magnetic disk exhibits total runout having an RRO component and a nonrepeatable runout (NRO) component. The control system generates a control signal for positioning a transducer head during a track following operation based on distributed position information defining the followed track. PES values are calculated based on the distributed servo position information read during a track following operation. The first servo-loop compensator processes the PES values during normal data access operations and has a first transfer function that is optimized with respect to a variance of the total runout. The second servo-loop compensator processes the PES values during a RRO calibration operation and has a second transfer function that is optimized with respect to a variance of the NRO component.
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申请公布号 |
US7196864(B1) |
申请公布日期 |
2007.03.27 |
申请号 |
US20050153153 |
申请日期 |
2005.06.15 |
申请人 |
WESTERN DIGITAL TECHNOLOGIES, INC. |
发明人 |
YI LI;MELKOTE HEMANT |
分类号 |
G11B5/596;G11B5/58 |
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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