Digital servo control system for use in disk drives

Details Digital servo control system for use in disk drives Digital servo control system for use in disk drives

1995-06-01

1997-10-21

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7809, G11B 5596

Patent

active

056802722

ABSTRACT:
A servo control system provides adaptive compensation for a variety of tracking and seek problems found in disk drives. The servo control system is ideally implemented in digital form for accuracy, speed and compactness. A first embodiment includes two modes, a tracking (or position) mode and a seek (or velocity) mode, each mode employing a variety of compensation functions. A second embodiment includes a single comprehensive control system which functions during both tracking and seek operations.

REFERENCES:
patent: 3458785 (1969-07-01), Sordello
patent: 3881184 (1975-04-01), Koepcke et al.
patent: 4057832 (1977-11-01), Kappert
patent: 4135217 (1979-01-01), Jacques et al.
patent: 4355273 (1982-10-01), DuVall
patent: 4412161 (1983-10-01), Cornaby
patent: 4486797 (1984-12-01), Workman
patent: 4516162 (1985-05-01), West
patent: 4524398 (1985-06-01), Fujiki
patent: 4536809 (1985-08-01), Sidman
patent: 4575776 (1986-03-01), Stephens et al.
patent: 4590526 (1986-05-01), Laatt et al.
patent: 4591933 (1986-05-01), Quackenbush
patent: 4616276 (1986-10-01), Workman
patent: 4618898 (1986-10-01), Young et al.
patent: 4638383 (1987-01-01), McGinlay et al.
patent: 4677507 (1987-06-01), Elliott
patent: 4679103 (1987-07-01), Workman
patent: 4697127 (1987-09-01), Stich et al.
patent: 4755977 (1988-07-01), Abed
patent: 4775903 (1988-10-01), Knowles
patent: 4783705 (1988-11-01), Moon et al.
patent: 4788608 (1988-11-01), Tsujisawa
patent: 4803572 (1989-02-01), Haruna et al.
patent: 4821125 (1989-04-01), Christensen et al.
patent: 4823212 (1989-04-01), Knowles et al.
patent: 4835632 (1989-05-01), Shih et al.
patent: 4835633 (1989-05-01), Edel et al.
patent: 4879612 (1989-11-01), Freeze et al.
patent: 4890172 (1989-12-01), Watt et al.
patent: 4907107 (1990-03-01), Sukurai
patent: 4907109 (1990-03-01), Senio
patent: 4914644 (1990-04-01), Chen et al.
patent: 4914725 (1990-04-01), Belser et al.
patent: 4942564 (1990-07-01), Hofer et al.
patent: 4954909 (1990-09-01), Sengoku
patent: 4969059 (1990-11-01), Volz et al.
patent: 4982297 (1991-01-01), Tsujisawa
patent: 5038333 (1991-08-01), Chow et al.
patent: 5047880 (1991-09-01), Ohno
patent: 5109307 (1992-04-01), Sidman
patent: 5182684 (1993-01-01), Thomas et al.
N. H. Hansen; A Head-Positioning System Using Buried Servos: IEEE Transactions on Magnetics, vol. Mag-17, No. 6, Nov. 1981; pp. 2735-2738.
I. Mee; vol. II: Computer Data Storage; 1988; pp. 80-83.
D.H. Pennington et al, "Digital Velocity Reference Curve Anticipator," IBM Technical Disclosure Bulletin, vol. 26, No. 3B, Aug. 1983, pp. 1741 and 1742.
J. P. Mantey, "Offset Force Correction for Disk File," IBM Technical Disclosure Bulletin, vol. 21, No. 5, Oct. 1978, pp. 1792-1794.

Affiliated with

Also associated with

Rating

Digital servo control system for use in disk drives does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital servo control system for use in disk drives, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital servo control system for use in disk drives will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1011597