Method and apparatus for track accessing using a predicted state

Details Method and apparatus for track accessing using a predicted state Method and apparatus for track accessing using a predicted state

1987-02-11

1988-12-20

Cardillo, Raymond F.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

364165, 364178, 318561, G11B 2108, G11B 555, G11B 1302

Patent

active

047928700

ABSTRACT:
A method and apparatus for displacing a system that is movable with respect to a carrier of data recorded on a plurality of tracks, including a reading head (TEL.sub.1), which is displaced on a given path the position on which is measured at predetermined sampling instants (kT), characterized in that: (1) at each instant kT, the value of the state vector X0 k/k-1 is predicted, as a function of the measured position x.sub.m (k-1) and of the control voltage u(k-1), which are considered at the preceding sampling instant (k-1)T; (2) the predicted state vector is compared with a reference state vector Wk); and (3) the control voltage u(k) is calculated as a function of a reference control voltage e(k) at the instant kT and of the difference .epsilon. (k) between the predicted state vector and the reference state vector.

REFERENCES:
patent: 4031443 (1977-06-01), Droux et al.
patent: 4133011 (1979-01-01), Kurzweil, Jr.
patent: 4166970 (1979-09-01), Cardot et al.
patent: 4297734 (1981-10-01), Laishley et al.
patent: 4383207 (1983-05-01), Maury
patent: 4491776 (1985-01-01), Veale
IBM TDB vol. 19, No. 12 "Algorithm For Track Capture and Following on Disk Files" Craft, 5/77, pp. 4787-4789.
IBM TDB vol. 21, No. 5, "Offset Force Correction For Disk File" Mantey, 10/78, pp. 1792-1795.
IEEE Transactions on Magnetics, vol. MAG-17, No. 4 Jul. 1981, pp. 1396-1402 New York, U.S.; C. Maury: "High Track Density for Magnetic Disk Drives with an Embedded Servo Positioning System".
IBM Technical Disclosure Bulletin, vol. 9 No. 5, Oct. 1976, p. 1884 J. W. Reed: "Access-Control System with Reduced Velocity Error".

Affiliated with

Also associated with

Rating

Method and apparatus for track accessing using a predicted state 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 apparatus for track accessing using a predicted state, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for track accessing using a predicted state will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1912568