Seek control method, seek control device and medium storage...

Details Seek control method, seek control device and medium storage... Seek control method, seek control device and medium storage...

2007-04-25

2008-12-02

Sniezek, Andrew L. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S078060, C360S078090

Reexamination Certificate

active

07460331

ABSTRACT:
In a seek control device based on a current observer control which performs two degree of freedom control, a current step difference to be generated when seek control is switched to following control is prevented. When seek control is switched to following control, a current step difference cancellation trajectory generation section calculates a current value Udiff for the amount of the step difference based on a difference between current values u(n) and u(n−1), and supplies a target position trajectory r′(n) (or target current trajectory) for offsetting this calculated value to a following controller. Therefore the current step difference of the output current is cancelled.

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