Control system for positioning head in disk device by estimating

Details Control system for positioning head in disk device by estimating Control system for positioning head in disk device by estimating

1994-01-07

1995-11-07

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 75, G11B 5596, G11B 2102

Patent

active

054651832

ABSTRACT:
A control system rotates disks as information storage media to position a head in a disk drive that records or reproduces data. An actuator swings the head in the radial direction of the disk. Positioning of the head is performed by a servo control system adjusting a drive current supplied to the actuator based on the value of the drive current and head position information. Parameters for the actuator are estimated based on the head position information and the value of the drive current obtained when the head is vibrated at one or more frequencies in a plurality of positions. The estimated parameters are used to adjust input/output signals for the servo control system to correct the preset parameters for the control system.

REFERENCES:
patent: 4477755 (1984-10-01), Rickert
patent: 4697127 (1987-09-01), Stich et al.
patent: 5153787 (1992-10-01), Sidman
patent: 5402400 (1995-03-01), Hamada et al.

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