Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2006-01-10
2006-01-10
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
Reexamination Certificate
active
06985327
ABSTRACT:
A compensation element (317) in a feedforward line in a dual stage control system for a data storage system compensates for the undesired transient motion of a first positioning element (i.e., a coarse actuator). The compensation element is a transfer function that is applied from the first positioning element's control signal (Uv) to a second positioning elements's (306) (i.e., microactuator's) input. The transfer function is defined as formula (I) where ^Vnom(z) is a transfer function model of the nominial portion of the first positioning element, ^Vres(z) is a transfer function model of the resonance portion of the first positioning element, and ^M(z) is a transfer function model of the dynamics of the second positioning element. This feedforward transfer function effectively cancels the resonances of the first positioning element without requiring the inversion of the resonance transfer function.
REFERENCES:
patent: 3657524 (1972-04-01), Bakke
patent: 3924268 (1975-12-01), McIntosh et al.
patent: 4200827 (1980-04-01), Oswald
patent: 4736353 (1988-04-01), Kasai et al.
patent: 5177652 (1993-01-01), Yamaguchi et al.
patent: 5189578 (1993-02-01), Mori et al.
patent: 5305158 (1994-04-01), Ueda et al.
patent: 5317550 (1994-05-01), Semba
patent: 5402400 (1995-03-01), Hamada et al.
patent: 5452275 (1995-09-01), Ogawa
patent: 5623461 (1997-04-01), Sohmuta
patent: 5710497 (1998-01-01), Yanagimachi
patent: 5745319 (1998-04-01), Takekado et al.
patent: 5796558 (1998-08-01), Hanrahan et al.
patent: 5856896 (1999-01-01), Berg et al.
patent: 5862015 (1999-01-01), Evans et al.
patent: 5920441 (1999-07-01), Cunningham et al.
patent: 6005742 (1999-12-01), Cunningham et al.
patent: 6049441 (2000-04-01), Ottesen
patent: 6088187 (2000-07-01), Takaishi
patent: 6101058 (2000-08-01), Morris
patent: 6160676 (2000-12-01), Takaishi
patent: 6295184 (2001-09-01), Takekado
patent: 6320720 (2001-11-01), Hattori
patent: 6470225 (2002-10-01), Yutkowitz
patent: 6490118 (2002-12-01), Ell et al.
patent: 6493177 (2002-12-01), Ell et al.
patent: 6583964 (2003-06-01), Huang et al.
patent: 6587303 (2003-07-01), Bui et al.
patent: 6600619 (2003-07-01), Morris et al.
patent: 0924689 (1999-06-01), None
patent: 2-263369 (1990-10-01), None
Berger Derek J.
Hudspeth David
Lucente David K.
Seagate Technology LLC
Tzeng Fred F.
LandOfFree
Method and control scheme for compensating the coarse... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and control scheme for compensating the coarse..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and control scheme for compensating the coarse... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3590978