Disk drive servo system using gain limited high-frequency track-following compensator
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United States of America Patent
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-
Sep 17, 1991
Grant Date -
N/A
app pub date -
Oct 12, 1989
filing date -
Oct 12, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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