Position control system for read/write device

Details Position control system for read/write device Position control system for read/write device

1989-03-16

1992-02-11

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7704, 360 7702, 360 7811, 369 32, 369 4429, G11B 555, G11B 2108, G11B 2110

Patent

active

050879979

ABSTRACT:
A position control system for a read/write device for fast positioning the read/write device at a particular track of a disk having a tracking pattern in the recording medium. The system having a transportation unit for transporting the read/write device to a target track and a control loop containing a BAF (multi-peak band-pass filter), includes a position control unit for controlling the position of the read/write device so as for the read/write device to track the target track, and a storage unit for storing the internal variables of the BAF filter. When the operation by the transportation unit is switched to the operation of the position control unit, the operation of the BAF filter is performed in accordance with the internal values or initial values stored beforehand, a particular one of the variables stored beforehand is used for the operation by the position control unit, or a reference value of the speed control is adjusted in accordance with a particular one of the variables stored beforehand.

REFERENCES:
patent: 3881184 (1975-04-01), Koepcke et al.
patent: 4536809 (1985-08-01), Sidman
patent: 4788608 (1988-11-01), Tsujisawa

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