发明名称 |
HEAD POSITION CONTROL DEVICE, MAGNETIC RECORDING EVALUATION APPARATUS, AND HEAD POSITION CONTROL METHOD |
摘要 |
At time to start learning feed-forward control and under the status that servo-drive is not put in execution, a positioning error of repeatable runout is detected by means of a positioning error of repeatable runout operation section and on the basis of a value of the positioning error of repeatable runout, a drive pattern and drive interval of idling are determined by means of a feed-forward data operation section. The drive pattern is stored in a feed-forward data memory and is outputted as feed-forward data in synchronism with the rotation of a spindle during drive interval, thus performing idling of a fine-movement actuator. After the idling has ended, control initiation sequence is resumed to carry out learning of feed-forward control.
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申请公布号 |
US2011090590(A1) |
申请公布日期 |
2011.04.21 |
申请号 |
US20100906687 |
申请日期 |
2010.10.18 |
申请人 |
HITACHI HIGH-TECHNOLOGIES CORPORATION |
发明人 |
YAMAMOTO YUKIO;MATSUDA YASUHIRO;SUGIYAMA TOSHINORI;SAKURAI YOSHIHIRO;HIGA KUNIHITO |
分类号 |
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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