Disk apparatus and head positioning method

Details Disk apparatus and head positioning method Disk apparatus and head positioning method

2006-01-03

2006-01-03

Sniezek, Andrew L. (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S075000, C360S078040

Reexamination Certificate

active

06982848

ABSTRACT:
A disk apparatus includes: an actuator7; a driver10; a voltage detector11for outputting first voltage signal Ed which is produced in a driving coil5of the actuator7; a voltage signal adjuster16for outputting pseudo disturbance signal ur and generating second voltage signal Ed+from pseudo disturbance signal ur, driving signal u, first voltage signal Ed, and disturbance estimation signal τdest; a disturbance estimator12for estimating the magnitude of disturbance load τd applied to a magnetic head2from driving signal u and second voltage signal Ed+to output disturbance estimation signal τdest; a position detector13for generating position error signal e which corresponds to a current position of the magnetic head2; a position controller14for generating control signal c from position error signal e; and a corrector15for generating driving signal u from disturbance estimation signal τdestand position control signal c.

REFERENCES:
patent: 5844743 (1998-12-01), Funches
patent: 6690536 (2004-02-01), Ryan
patent: 3-30156 (1991-02-01), None
patent: 5-62385 (1993-03-01), None
patent: 9-231701 (1997-09-01), None

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