Head positioning method, and disk apparatus using the same

Details Head positioning method, and disk apparatus using the same Head positioning method, and disk apparatus using the same

2005-06-07

2005-06-07

Sniezek, Andrew L. (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S078040, C360S077020

Reexamination Certificate

active

06903896

ABSTRACT:
A disturbance compensation signal is produced by estimating the magnitude of disturbance acting upon an actuator based on a driving signal and a voltage signal generated when driving the actuator. A control signal is produced by multiplying the disturbance compensation signal by a gain adjustment coefficient. A head position error signal is produced based on the target position of a magnetic head and the current position of the magnetic head that is detected based on servo information recorded in advance on a magnetic disk. A gain adjuster obtains the driving signal by adding together the control signal and a position control signal. The actuator is driven with the driving signal output from the gain adjuster.

REFERENCES:
patent: 5473550 (1995-12-01), Cameron et al.
patent: 6031684 (2000-02-01), Gregg
patent: 2002/0181142 (2002-12-01), Kokami et al.
patent: 1 174 861 (2002-01-01), None
patent: 09-231701 (1997-09-01), None
patent: P2002-42434 (2002-02-01), None
patent: 2002-251850 (2002-09-01), None

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