Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2005-08-30
2005-08-30
Sniezek, Andrew L. (Department: 2651)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
C318S560000, C318S611000, C360S075000
Reexamination Certificate
active
06937428
ABSTRACT:
An apparatus and method for compensating actuator arm oscillation induced by resonance mode excitation during a seek in a disc drive data handling system. The actuator arm supports a head adjacent a recording surface, and a servo loop controls the position of the actuator arm. A frequency of actuator arm oscillation is identified, after which a seek is initiated to move the head from an initial track to a destination track on the recording surface. A position error signal (PES) is generated to indicate position of the head relative to the destination track, and a compensation signal is generated by a filter based on the PES and the frequency of oscillation of the actuator arm. The compensation signal is adapted to remove a component of the PES arising from the actuator arm oscillation, and is applied to the servo loop as the head is settled onto the destination track.
REFERENCES:
patent: 4477755 (1984-10-01), Rickert
patent: 4536809 (1985-08-01), Sidman
patent: 4574227 (1986-03-01), Herder et al.
patent: 4894599 (1990-01-01), Ottesen
patent: 4965501 (1990-10-01), Hashimoto
patent: 5050016 (1991-09-01), Squires
patent: 5072318 (1991-12-01), Yu
patent: 5189571 (1993-02-01), Murphy et al.
patent: 5325247 (1994-06-01), Ehrlich et al.
patent: 5510939 (1996-04-01), Lewis
patent: 5608586 (1997-03-01), Sri-Jayantha et al.
patent: 5608589 (1997-03-01), Kang et al.
patent: 5610487 (1997-03-01), Hutsell
patent: 5646797 (1997-07-01), Kadlec et al.
patent: 5661615 (1997-08-01), Waugh et al.
patent: 5691617 (1997-11-01), Funches
patent: 5801905 (1998-09-01), Schirle et al.
patent: 5901009 (1999-05-01), Sri-Jayantha et al.
patent: 6014285 (2000-01-01), Okamura
patent: 6088186 (2000-07-01), Carlson
patent: 6122125 (2000-09-01), Clare et al.
patent: 6166876 (2000-12-01), Liu
patent: 6377418 (2002-04-01), Kagami et al.
patent: 2002/0006009 (2002-01-01), Ooi et al.
patent: 2002/0034036 (2002-03-01), Sri-Jayantha et al.
patent: 2002/0041472 (2002-04-01), Ding et al.
patent: 0 263 962 (1988-04-01), None
patent: 0 314 111 (1989-03-01), None
Alexi H. Sacks et al., “Advanced Methods For Repeatable Runout Compensation,” IEEE Transaction on Magnetics, 1st ed., IEEE Magnetics Society (San Diego, CA, USA), vol. 31 (No. 2), p. 1031-1036, (Feb. 3, 1995).
Abou-Jaoude Fadi Youssef
Campbell Gregory Andrew
Ho Hai Thanh
Won Justin
Berger Derek J.
Lucente David K.
Seagate Technology LLC
Sniezek Andrew L.
LandOfFree
Reducing actuator arm oscillation during settle mode in a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reducing actuator arm oscillation during settle mode in a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reducing actuator arm oscillation during settle mode in a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3477313