Disk drive recursively estimating repeatable runout
US7088547B1 · kind B1 · utility
122Cited by
10References
12Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 25, 2005 |
| Grant date | Aug 8, 2006 |
| Priority date | — |
| Expiry date | Jul 25, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59627
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive is disclosed comprising control circuitry for generating a control signal applied to a VCM in response to a position error signal (PES) generated from reading embedded servo sectors and a feed-forward compensation value that compensates for a repeatable runout (RRO) disturbance. The feed-forward compensation value is generated for each servo sector in response to an RRO estimate Ŝ computed recursively for each servo sector according to:wherein: λ is a predetermined fraction;
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.