System for controlling rotation of rotating structure

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

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318603, G11B 1554, G11B 1928

Patent

active

042951712

ABSTRACT:
A system for controlling the rotation of a rotating structure comprises a detector for detecting the rotation of the rotating structure a circuit for repeatedly forming address signals for every revolution of the rotating structure in response to a detection output from the rotation detector, a memory circuit in which control data responsive to deviations in the rotational peripheral speed of the rotating structure in each revolution thereof have been stored beforehand at addresses corresponding to the address signals, the address signals being supplied to the memory circuit, whereupon the data stored at the corresponding addresses are read out, and a control circuit for obtaining a control signal from the detection output of the rotation detector and the data thus read out from the memory circuit and accordingly controlling the rotation of the rotating structure.

REFERENCES:
patent: 4146910 (1979-03-01), Oliver et al.
patent: 4157488 (1979-06-01), Allan
patent: 4190860 (1980-02-01), Somers et al.
patent: 4217612 (1980-08-01), Matla et al.

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