Disk drive employing adaptive feed-forward vibration compensation to enhance a retry operation
US6538839B1 · kind B1 · utility
130Cited by
10References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 31, 2001 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Sep 28, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59694
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive is disclosed comprising a head, and an actuator, responsive to an adjusted control effort signal, for actuating the head radially over a disk. An adaptive feed-forward signal is generated in response to a vibration affecting the disk drive and combined with a nominal control effort signal to generate the adjusted control effort signal. During a normal read operation the feed-forward signal is substantially removed from the adjusted control effort signal, and during a retry read operation the feed-forward signal is included in the adjusted control effort signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.