Movable head position controlling device for magnetic recording

Details Movable head position controlling device for magnetic recording Movable head position controlling device for magnetic recording

1993-04-14

1995-04-04

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7701, 360 7809, G11B 2102

Patent

active

054042526

ABSTRACT:
A movable head position controlling device for magnetic recording and reproducing apparatuses. The position of a magnetic head is detected. The magnetic head is driven by an actuator in accordance with a driving signal. The driving signal is corrected on the basis of the estimated speed of the magnetic head, the absolute height of the movable head, the displacement of the magnetic head, or the output of an equivalent coil. The speed of the magnetic head is estimated by a speed estimating observer. The absolute height is detected by a magnetic field detecting element. The displacement of the magnetic head is detected by non-contacting sensors attached to a member which moves together with the magnetic head and a member which does not move together with the magnetic head, respectively.

REFERENCES:
patent: 3626264 (1971-12-01), Halfhill et al.
patent: 4379256 (1983-04-01), Maury
patent: 4392163 (1983-07-01), Rijckaert
patent: 4679103 (1987-07-01), Workman
patent: 4688109 (1987-08-01), Sangu
patent: 4760471 (1988-07-01), Brush et al.
patent: 4851754 (1989-07-01), Sakamoto et al.
patent: 4954902 (1990-09-01), Furuhata et al.
patent: 5090005 (1992-02-01), Hara et al.
Patent Abstracts of Japan, vol. 14, No. 1, Jan. 1990.

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