Invention Grant
US07675707B1 Disk drive employing repeatable disturbance compensation for fly height control
失效
磁盘驱动器采用可重复的扰动补偿来进行飞行高度控制
- Patent Title: Disk drive employing repeatable disturbance compensation for fly height control
- Patent Title (中): 磁盘驱动器采用可重复的扰动补偿来进行飞行高度控制
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Application No.: US12275989Application Date: 2008-11-21
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Publication No.: US07675707B1Publication Date: 2010-03-09
- Inventor: Hain-Ling Liu , Min Chen , Soo-Choon Kang
- Applicant: Hain-Ling Liu , Min Chen , Soo-Choon Kang
- Applicant Address: US CA Lake Forest
- Assignee: Western Digital Technologies, Inc.
- Current Assignee: Western Digital Technologies, Inc.
- Current Assignee Address: US CA Lake Forest
- Agent Howard H. Sheerin, Esq.
- Main IPC: G11B21/02
- IPC: G11B21/02
Abstract:
A disk drive is disclosed comprising a disk, a head actuated over the disk, and control circuitry operable to generate a fly height control signal. A fly height of the head is measured, and the measured fly height is combined with a target fly height and a feedforward signal, wherein the feedforward signal is generated according to: a1·cos(2πn1k/N)+b1·sin(2πn1k/N) where a1 and b1 are coefficients and 2πn1k/N represents a frequency of a repeatable disturbance in the fly height of the head.
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