. The Bell System technical journal . DASHPOT SERIES L-R-CL R C ^-dt^^^^i^^. ^-df^*i/^^^ Fig. 1—Electrical-mechanical analog}. the two shafts. Thus the action of the synchro pair is that of a combinedtransfer stiffness and differential. The tachometer is a generator whichproduces an output voltage e proportional to 6, the angular speed of itsshaft. The ratio of e to 0 is a transfer resistance constant Rt . LINEAR SERVO THEORY 619 There are many other specific devices used to convert from mechanicalto electrical quantities. Most are equivalent to the potentiometer or syn-chro circuit, one such
. The Bell System technical journal . DASHPOT SERIES L-R-CL R C ^-dt^^^^i^^. ^-df^*i/^^^ Fig. 1—Electrical-mechanical analog}. the two shafts. Thus the action of the synchro pair is that of a combinedtransfer stiffness and differential. The tachometer is a generator whichproduces an output voltage e proportional to 6, the angular speed of itsshaft. The ratio of e to 0 is a transfer resistance constant Rt . LINEAR SERVO THEORY 619 There are many other specific devices used to convert from mechanicalto electrical quantities. Most are equivalent to the potentiometer or syn-chro circuit, one such being a lobing radar antenna, which delivers a voltageproportional to an angular difference. A different, less widely used deviceis the accelerometer, a generator which delivers an output voltage propor-tional to the angular acceleration of its shaft. Its characteristic is that of atransfer inductance or inertia. T=Hte de
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