Magnetic recording/reproducing apparatus

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the record

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360 7304, G11B 1546

Patent

active

056638450

ABSTRACT:
A magnetic recording/reproducing apparatus compares speed information obtained by speed detecting means for a magnetic tape with a set travelling speed of the magnetic tape in a control circuit, and controls the rotational frequency of a driving motor for a take-up reel, thereby controlling constant-speed travelling of the magnetic tape, with employment of no capstan. According to this system, the overall apparatus can be simplified and miniaturized with reduction in weight and cost. Further, it is possible to improve constant-speed travelling performance of the magnetic tape by adjusting resonance and antiresonance appearing due to total equivalent inertia moment related to the magnetic tape and reels in the transfer characteristic of the control system.

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T. J. Chou et al., "Precision Tape Control," IBM Technical Disclosure Bulletin, vol. 12, No. 7, pp. 967-968 (1969).
Inoue, et al., "High Accuracy Control in Repetitive Driving of Proton Synchrotron Electromagnet Power Source"--Denki Gakkai Ronbun-Shi C, Jul. 20, 1980.
"Consideration Of Disturbance Suppression in Control System Using Repetitive Learning Compensator and Proposal of Multiple Period Learning Compensator"--System and Control, vol. 31, No. 5, 1987.

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