Digital velocity control for a disk drive servo system
US4677507A · kind A · utility
24Cited by
2References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 30, 1986 |
| Grant date | Jun 30, 1987 |
| Priority date | — |
| Expiry date | May 30, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/085
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A high velocity seek deceleration technique is disclosed for seek operations of disk drives wherein measured time per track is compared to a predetermined time per track in a memory as indexed by number of tracks to end of seek determines an error value which adjusts a deceleration amplifier. The gain of digital output to the amplifier is adjusted depending on the number of tracks to end of seek, the higher the number, the higher the gain. Further, a variable bandwidth filter is employed to increase bandwidth as velocity decreases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.