Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
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 head
C360S078070, C360S078090
Reexamination Certificate
active
07136256
ABSTRACT:
A head positioning method and device positions a head which reads a disk-type storage medium at a specified location, and accurately estimates a bias value during settling control. A disk device includes a disk medium, a head, an actuator, and a control circuit, and settling control is performed based on a detected position after coarse control without integral compensation or bias compensation having been performed. The position of the head for a next sample is estimated, and an initial bias value is estimated from the difference between the detected position and the estimated position. This initial bias value is then used to perform settling control together with integral compensation of bias compensation. Since the accurate initial bias value at the start of settling is estimated, it is possible to reduce the time for correcting the shift in the bias during settling control, and greatly reduce the time required for settling control.
REFERENCES:
patent: 4894599 (1990-01-01), Ottesen et al.
patent: 5111124 (1992-05-01), Kurosawa
patent: 5126897 (1992-06-01), Ogawa et al.
patent: 5150266 (1992-09-01), Albert
patent: 5381282 (1995-01-01), Arai et al.
patent: 5459624 (1995-10-01), Erickson et al.
patent: 5680271 (1997-10-01), Yatsu
patent: 5859742 (1999-01-01), Takaishi
patent: 6140791 (2000-10-01), Zhang
patent: 6166876 (2000-12-01), Liu
patent: 6429996 (2002-08-01), Iwashiro
patent: 6545838 (2003-04-01), Burton
patent: 6590735 (2003-07-01), Brittner et al.
patent: 2-265079 (1990-10-01), None
patent: 3-288913 (1991-12-01), None
patent: 5-165528 (1993-07-01), None
patent: 5-274040 (1993-10-01), None
patent: 06139729 (1994-05-01), None
patent: 7-57414 (1995-03-01), None
patent: 07192412 (1995-07-01), None
patent: 08255023 (1996-10-01), None
patent: 08329630 (1996-12-01), None
patent: 09139032 (1997-05-01), None
patent: 10125020 (1998-05-01), None
patent: WO99/44194 (1999-09-01), None
Machine Translation of JP7-57414, obtained via Internet on Jan. 29, 2006 from JPO website, 5 pages.
Saito Shunji
Takaishi Kazuhiko
Fujitsu Limited
Greer Burns & Crain Ltd.
Habermehl James L
Nguyen Hoa T.
LandOfFree
Head positioning control method for a storage device and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Head positioning control method for a storage device and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Head positioning control method for a storage device and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3667291