Servo control device and method using a minimal bias table for d

Details Servo control device and method using a minimal bias table for d Servo control device and method using a minimal bias table for d

1997-04-30

1999-12-07

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7804, G11B 555

Patent

active

059993618

ABSTRACT:
A servo control device for controlling a plant to generate the position information, comprises an initial bias value storage unit for updating the initial bias value with a bias value corresponding to the current position information, and an estimation unit for making an estimation of the current position, velocity, and disturbance, wherein the estimation unit increases the internal bias gain value, restores the increased internal bias gain value to the original value when settling is started, produces the disturbance estimation value corresponding to the gain value, and uses the disturbance estimation value as the initial settling value in response to a long seek stroke command, or uses the previous initial bias value of the preceding seek stroke updated by the initial bias value storage unit as the initial settling value in response to a short seek stroke command.

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