发明名称 |
Method for recursively determining repeatable runout cancellation values in a magnetic disk drive |
摘要 |
A method is disclosed for recursively determining repeatable runout (RRO) cancellation values in a disk drive having a head disk assembly (HDA) and a sampled servo controller. The HDA includes a disk having distributed position information in servo wedges, a rotary actuator carrying a head that periodically reads the position information, and a voice coil motor circuit that responds to a control effort signal. The servo controller periodically adjusts the control effort signal during a track-following operation. In the method, resonant filter values for developing RRO cancellation values are iteratively learned and updated after each disk rotation during track following operations on a predetermined track until a threshold, such as a particular number of disk rotations, is obtained.
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申请公布号 |
US6826006(B1) |
申请公布日期 |
2004.11.30 |
申请号 |
US20020262482 |
申请日期 |
2002.09.30 |
申请人 |
WESTERN DIGITAL TECHNOLOGIES, INC. |
发明人 |
MELKOTE HEMANT;QUISENBERRY RUSS A. |
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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