Adaptive velocity profile selection based on torque constant mea

Details Adaptive velocity profile selection based on torque constant mea Adaptive velocity profile selection based on torque constant mea

1989-11-28

1992-07-21

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7806, G11B 555

Patent

active

051328550

ABSTRACT:
A method for eliminating overshoot of a destination track by a servo head of a rotating disk data storage device during seeks wherein the seek is carried out in accordance with an adaptive velocity demand profile selected to undershoot the destination track by an amount sufficient to offset overshoot arising from an incapacity of the servo head to follow a velocity demand profile. Prior to performing the seek, the servo head is moved a distance about a null position on the disk at which the only force on the actuator on which the head is mounted arises from a constant current passed through the actuator and the time for the movement is measured and utilized to select the adaptive demand profile. Adaptive demand profiles are obtained by performing seeks while modifying a nominal profile to eliminate actuator current ringing at the end of the seek.

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