Inter-sample switching of servo control in direct access storage

Details Inter-sample switching of servo control in direct access storage Inter-sample switching of servo control in direct access storage

1991-10-18

1995-01-10

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7806, 360 7814, 360 7704, G11B 5596

Patent

active

053812824

ABSTRACT:
A direct access storage device and a method of operation thereof where the output of the circuit which controls energy to the position actuator for the head may be changed at times between receipt of sequential position error signals from the medium. Instead of waiting for the next position error signal, a computation is done based on at least the current position and the desired position of the head as to when the head velocity will be equal to a desired velocity. The optimum time to switch is estimated, the energy required to achieve a predetermined velocity and a predetermined offset with respect to the desired position are computed, and operation is conducted accordingly. The amount of energy may again be changed at a time subsequent to the estimated time. The predetermined velocity and the predetermined offset may be zero or may have values other than zero in accordance with the requirements of the track following controller.

REFERENCES:
patent: 4030132 (1977-06-01), Iftikar et al.
patent: 4486797 (1984-12-01), Workman
patent: 4488189 (1984-12-01), Axmear et al.
patent: 4544968 (1985-10-01), Anderson et al.
patent: 4679103 (1987-07-01), Workman
patent: 4695780 (1987-09-01), Kurakake et al.
patent: 4697127 (1987-09-01), Stich et al.
patent: 4792870 (1988-12-01), Pinson
patent: 4827200 (1989-05-01), Ogura et al.
patent: 4894599 (1990-01-01), Ottesen et al.
patent: 4907109 (1990-03-01), Senio
patent: 5164931 (1992-11-01), Yamaguchi et al.
H. M. Ottesen, "Apparatus for Detecting and Correcting Excessive Vibration in a Disk File", IBM Technical Disclosure Bulleting, vol. 30, No. 6, Nov. 1987.

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