Digital velocity control for a disk drive servo system

Details Digital velocity control for a disk drive servo system Digital velocity control for a disk drive servo system

1986-05-30

1987-06-30

Stellar, George G.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

G11B 555

Patent

active

046775072

ABSTRACT:
A high velocity seek deceleration technique is disclosed for seek operations of disk drives wherein measured time per track is compared to a predetermined time per track in a memory as indexed by number of tracks to end of seek determines an error value which adjusts a deceleration amplifier. The gain of digital output to the amplifier is adjusted depending on the number of tracks to end of seek, the higher the number, the higher the gain. Further, a variable bandwidth filter is employed to increase bandwidth as velocity decreases.

REFERENCES:
patent: 4172267 (1979-10-01), Sidman
patent: 4288731 (1981-09-01), Lee

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