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Servo Integrator

IP.com Disclosure Number: IPCOM000097932D
Original Publication Date: 1961-Oct-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Boehm, RF: AUTHOR

Abstract

An analog voltage V(t) to be integrated is connected to a normally open point 10 of a control relay 11. The transfer arm of 11 is connected to the input of servo amplifier 12. The output of 12 drives servo-motor 13 which is mechanically coupled to power generator 14, slidewire 15 of a feedback potentiometer 16, and input portions of clutches 17 and 18. The output shaft of 17 is connected to slidewire 19 of output potentiometer 20. The driven part of clutch 18 is linked with the same slidewire 19 through reversing box 21.

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Servo Integrator

An analog voltage V(t) to be integrated is connected to a normally open point 10 of a control relay 11. The transfer arm of 11 is connected to the input of servo amplifier 12. The output of 12 drives servo-motor 13 which is mechanically coupled to power generator 14, slidewire 15 of a feedback potentiometer 16, and input portions of clutches 17 and 18. The output shaft of 17 is connected to slidewire 19 of output potentiometer 20. The driven part of clutch 18 is linked with the same slidewire 19 through reversing box 21.

Potentiometer 16 has a grounded center-tap and its ends are shunted across a voltage supply E1+ and E1-. Similarly, output potentiometer 20 has a grounded center-tap and shunts a second voltage supply E2+ and E2-.

Clutches 17 and 18 are mechanically coupled by the energization of solenoids 22 and 23, respectively, by collateral devices not shown.

At the beginning of a sampling period of duration t, relay 11 and solenoid 22 are energized so that V(t) is supplied to amplifier 12. This causes the servo- motor to turn in a direction corresponding to the polarity of the analog voltage. This drives the slidewire of potentiometer 16 to a position functionally representative of this input voltage. Simultaneously, output potentiometer 20 is also driven to a correspondingly representative position through the engaged clutch 17. Negative feedback from generator 14 and slidewire 15 is applied to the input of amplifier 12 for a nulling out of...