Disk drive servo system using gain limited high-frequency track-

Details Disk drive servo system using gain limited high-frequency track- Disk drive servo system using gain limited high-frequency track-

1989-10-12

1991-09-17

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7702, 369 4429, G11B 5596, G11B 2110

Patent

active

050500163

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.

REFERENCES:
patent: 4326226 (1982-04-01), Touchton et al.
patent: 4511938 (1985-04-01), Betts
patent: 4775903 (1988-10-01), Knowles
patent: 4887173 (1989-12-01), Sengoku et al.
patent: 4954908 (1990-09-01), Sengoka

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