Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2007-10-31
2009-02-03
Tzeng, Fred (Department: 2627)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
Reexamination Certificate
active
07486469
ABSTRACT:
A method of minimizing a mechanical mode excitation is disclosed. A seed position trajectory is generated utilizing a third order time polynomial, wherein the third order time polynomial is segmented for constant velocity, and deceleration. A reference position is generated by applying a first infinite impulse response filter to the seed position trajectory. A reference acceleration is then generated by applying a second infinite impulse response filter to the reference position. Then, the reference position and the reference acceleration are fed forward to a servo loop such that an actuator follows a desired seek trajectory, thereby reducing a position error signal at the seek settling.
REFERENCES:
patent: 4937689 (1990-06-01), Seaver et al.
patent: 5050146 (1991-09-01), Richgels et al.
patent: 5345409 (1994-09-01), McGrath et al.
patent: 5510939 (1996-04-01), Lewis
patent: 5583501 (1996-12-01), Henrion et al.
patent: 6219196 (2001-04-01), Semba et al.
patent: 6384994 (2002-05-01), Smith et al.
patent: 6449117 (2002-09-01), Waugh
patent: 6831809 (2004-12-01), Kagami et al.
patent: 6870342 (2005-03-01), Naik
patent: 6888694 (2005-05-01), Guo et al.
patent: 7017857 (2006-03-01), Hill et al.
patent: 7126785 (2006-10-01), Li et al.
patent: 2002/0131186 (2002-09-01), Ottesen et al.
patent: 2003/0147172 (2003-08-01), Singer et al.
patent: 2004/0001278 (2004-01-01), Andress et al.
patent: 2004/0030664 (2004-02-01), Kotoulas et al.
patent: 2006/0077588 (2006-04-01), Shih
patent: 2006/0082922 (2006-04-01), Shih
patent: 2006/0114601 (2006-06-01), Semba et al.
patent: 2006/0158773 (2006-07-01), Semba et al.
patent: 0263962 (1992-01-01), None
patent: 03233609 (1991-10-01), None
Mizoshita, et al., “Vibration Minimized Access Control For disk Drives”,IEEE Transactions on Magnetics, vol. 32, No. 3, May 1996, 1793-1798.
Semba, et al., “Optimal Seek Trajectory Generation for a Hard Disk Drive Using Adaptive Filtering”,Proceedings of the 2006 American Control Conference, (Jun. 2006),594-599.
Hitachi Global Storage Technologies - Netherlands B.V.
Tzeng Fred
LandOfFree
Minimizing a mechanical mode excitation utilizing 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 Minimizing a mechanical mode excitation utilizing a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Minimizing a mechanical mode excitation utilizing a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4080728