Magnetic disk apparatus and method with actuator control using s

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head

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Details

360 7807, 360 7706, G11B 5596

Patent

active

054734827

ABSTRACT:
A magnetic disc apparatus controls the output timing of control current data by use of a servo estimation type observer. Servo information is read from a servo sector of a magnetic disc, decoded, and used to calculate control current data. Before the servo information of the following servo sector is fully decoded, the calculated control current data from the previously read servo sector is output, converted to a current, and sent to the actuator of a magnetic head.

REFERENCES:
patent: 4679103 (1987-07-01), Workman
patent: 4835632 (1989-05-01), Shih et al.
patent: 4910616 (1990-03-01), Sirai et al.
patent: 5153788 (1992-10-01), Nishikawa et al.
patent: 5295026 (1994-03-01), Chishima
patent: 5381282 (1995-01-01), Arai et al.
"Digital Control of Dynamic Systems--2nd ed." authored by G. Franklin et al, pub. Addison-Wesley Publishing Co., Inc. (1990), pp. 250-265.

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