Method and apparatus for providing a stable, high gain servo sys

Details Method and apparatus for providing a stable, high gain servo sys Method and apparatus for providing a stable, high gain servo sys

1976-03-19

1978-08-22

Schaefer, Robert K.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318341, 318345A, H02P 500

Patent

active

041091841

ABSTRACT:
A servo system is disclosed for accurately regulating velocity of a rotating drum, preferably for guiding a magnetic tape of a recording and reproducing system. The method and apparatus is characterized in that generation of a ramp signal is commenced in response to a first one of a series of tach signals provided at a rate proportional to the velocity of rotation of the drum, the ramp signal being interrupted for a predetermined time duration and thereafter recommenced, the ramp signal subsequently being monitored upon occurrence of a second tach signal in order to produce an error signal for adjusting velocity of the drum motor means and maintaining the proper drum velocity.

REFERENCES:
patent: 3241023 (1966-03-01), Eby
patent: 3935522 (1976-01-01), Tsay

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