Method and apparatus for rotary actuator arc compensation correc

Details Method and apparatus for rotary actuator arc compensation correc Method and apparatus for rotary actuator arc compensation correc

1998-05-29

1999-12-14

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 76, G11B 5596

Patent

active

060025409

ABSTRACT:
Rotary actuator arc compensation correction method and apparatus are provided for a direct access storage device (DASD). A reference feedforward correction signal is generated at each of a plurality of sectors around a predetermined track on a disk surface. A specific selected track is identified, and both magnitude and phase of the generated reference feedforward correction signal are modified to correct for the arced trajectory caused by the rotary actuator at the specific selected track. Improved actuator servo control is provided by using pseudo sector compensation to interpolate the feedforward correction signal between servo sectors.

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