Magnetic recording/reproducing apparatus capable of reducing a s

Details Magnetic recording/reproducing apparatus capable of reducing a s Magnetic recording/reproducing apparatus capable of reducing a s

1990-04-02

1992-06-30

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7806, 360 7705, G11B 555, G11B 5596

Patent

active

051268973

ABSTRACT:
In a servo type magnetic head drive control device, a moving velocity of a magnetic head is controlled on the basis of an error between an actual moving velocity value of the magnetic head generated using servo data and a target velocity value set in accordance with a moving distance to a target position. When the magnetic head is moved to a predetermined position, transient control is performing by using finite time settling control on the basis of position information and velocity information of the magnetic head, and normal tracking control or tracking control using the finite time settling control is performed to form positioning control of the magnetic head. Also a difference between the head position and the position of the head generated from a model is determined and used to control head movement.

REFERENCES:
patent: 4355273 (1982-10-01), DuVall
patent: 4594622 (1986-06-01), Wallis
patent: 4879612 (1989-11-01), Freeze et al.
patent: 4894599 (1990-01-01), Ottesen et al.
NTT, Report on the Use of Products of Research, vol. 28, No. 10 (1979) Peripheral Circuits for Driving an 800-MB Disk Apparatus, pp. 179-208.
Ciscato et al. Proc. Annu. Symp. Incremental Motion, 1988, vol. 17, pp. 129-142, Digital Positioning System for Disk Drives in Control System Devices.
Hanselmann et al. Proc. IECON, 1986, vol. 2, pp. 864-869, High Bandwidth Control of the Head Positioning Mechanism in a Winchester Disc Drive.

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