Spindle speed control using feed-forward estimation in a...

Details Spindle speed control using feed-forward estimation in a... Spindle speed control using feed-forward estimation in a...

2006-11-14

2006-11-14

Nguyen, Hoa T. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

Reexamination Certificate

active

07136248

ABSTRACT:
A method is applied to reduce a range in variation of a target spin speed for a rotatable medium in a data storage device. The method includes rotating the rotatable medium at the target spin speed, determining an initial position of a head relative to a surface of the rotatable medium, determining a target position of the head relative to the surface of the rotatable medium, calculating an adjusted spin speed based on the initial position and the target position, sending a signal to rotate the rotatable medium at the adjusted spin speed, repositioning the head from the initial position to the target position, and sending a signal to rotate the rotatable medium at the target spin speed.

REFERENCES:
patent: 5216647 (1993-06-01), Kitani
patent: 5473230 (1995-12-01), Dunn et al.
Davis, Michael W., “A New Spin on Suspension Windage,” Insight, Mar./Apr. 2001, pp. 8-12.
“Neon Filled Hard Drive to Reduce Power Consumption,” www.priorartdatabase.com/IPCOM/000013939/, Jan. 20, 2004.

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