Method and apparatus for fast positioning a head of a recording

Details Method and apparatus for fast positioning a head of a recording Method and apparatus for fast positioning a head of a recording

1992-10-16

1996-10-01

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7808, G11B 5596

Patent

active

055615686

ABSTRACT:
To achieve fast positioning of a head by determining an initial value dynamically from state variables of a system at a switching time of control modes. In a recording device having a head, a recording media including a plurality of tracks accessed by the head, and a motor for moving the head, in order to position the head to a target track by switching control modes and outputting a control signal value u(n) to drive the motor in response to an input signal value y(n) representing a difference between a current position of the head and the target track, the gain of a control system having the input and control signal values as state variables is changed only at a mode switching time.

REFERENCES:
patent: 4907109 (1990-03-01), Senio
patent: 5164931 (1992-11-01), Yamaguchi et al.
patent: 5168398 (1992-12-01), Kanda et al.
Head Positioning Servo Systems and High Track Density by R. K. Oswald Mar. 1988.

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