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US 7,839,595 B1Granted
Feed forward compensation for fly height control in a disk drive
AssigneeWestern Digital Technologies, Inc.
InventorsJack M. Chue, Tomas D. Hugunin
Life of this patent
Estimating the term…
Abstract
A method of selecting a dynamic fly height (DFH) control setting for a head in a disk drive is disclosed. The head is servoed over a disk, and a fly height measurement is generated for the head. A frequency component is extracted from the fly height measurement, and the DFH control setting for the head is adjusted in response to the extracted frequency component.
Claims23
A method of selecting a dynamic fly height (DFH) control setting for a head in a disk drive, the method comprising:
- servoing the head over a disk;
- generating a fly height measurement for the head;
- extracting a frequency component from the fly height measurement;
- and
- adjusting the DFH control setting for the head in response to the extracted frequency component.
2 more elements
A disk drive comprising:
- a disk;
- a head actuated over the disk;
- and
- control circuitry operable to select a dynamic fly height (DFH) control setting for the head by:
- servoing the head over the disk;
- generating a fly height measurement for the head;
- extracting a frequency component from the fly height measurement;
- and
- adjusting the DFH control setting for the head in response to the extracted frequency component.
6 more elements
A disk drive comprising:
- a disk;
- a head actuated over the disk;
- and
- a means for servoing the head over the disk;
- a means for generating a fly height measurement for the head;
- a means for extracting a frequency component from the fly height measurement;
- and
- a means for adjusting a DFH control setting for the head in response to the extracted frequency component.
5 more elements
Dependencies are inferred from the claim text.