Positioning control system and method therefor

Details Positioning control system and method therefor Positioning control system and method therefor

2009-02-26

2010-12-07

Sniezek, Andrew L (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S077040, C360S077080

Reexamination Certificate

active

07848050

ABSTRACT:
There is provided with a positioning control system which includes: a head moving unit configured to move a head for recording or reproducing information with respect to a disk capable of recording information; a position detecting unit configured to detect a position of the head; an error detecting unit configured to detect a position error signal of a detected head position with respect to a predetermined target position; a compensation controller configured to generate control input by performing phase lead compensation and phase delay compensation for the position error signal and supply the control input to the head moving unit; and a gain controller configured to control at least one of gains the phase lead compensation and the phase delay compensation based on frequency components contained in the position error signal and an amplitude of the position error signal.

REFERENCES:
patent: 6153998 (2000-11-01), Takakura
patent: 7576943 (2009-08-01), Atsumi et al.
patent: 2002/0089778 (2002-07-01), Shimokoshi et al.
patent: 2002/0093754 (2002-07-01), Zhang et al.
patent: 2004-178662 (2004-06-01), None
Venkataramanan et al, Discrete-Time Composite Nonlinear Feedback Control with an Application in Design of a Hard Disk Drive Servo System, IEEE Transactions on Control Systems Technology, vol. 11, No. 1, Jan. 2003.

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