Disk drive servo system using gain limited high-frequency track-following compensator
US5050016A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 12, 1989 |
| Grant date | Sep 17, 1991 |
| Priority date | — |
| Expiry date | Oct 12, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S360/903
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The disk drive system includes an actuator, responsive to an adjustment value, for adjusting the position of a data head with respect to data tracks located on the surface of a disk, and a controller coupled to the data head and to the actuator. The controller receives servo information read from the surface of the disk by the data head. In turn, the controller determines an adjustment value to be applied to the actuator. The adjustment value is calculated dependent on a predetermined variable gain factor. Where the controller determines the position of the heat is oscillating about the center line of a predetermined data track at a frequenc above a predetermined frequency, the controller reduces the gain factor applied in determining the adjustment value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.