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Comparison of lead network, tachometer, and damper stabilization for electric servos

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1 Author(s)
Biernson, George A. ; Sylvania Electric Products, Waltham, Mass.

Three types of compensation widely used to achieve stable operation in instrument servomechanisms are: the lead network, tachometer feedback, and the viscous-coupled-inertia damper. The paper compares these types of compensation in such matters as servo bandwidth, velocity constant, torque constant, transient response, tolerance to gear-train backlash, noise, and required amplifier gain. The purpose of this comparison is to provide a basis for selection of the most appropriate type of compensation for a particular application. The paper also serves to illustrate a method of analyzing servo performance in terms of the asymptotic gain-crossover frequency. Although this method may be theoretically trivial, it actually is a powerful tool for analyzing the performance of feedback control systems.

Published in:

Automatic Control, IRE Transactions on  (Volume:AC-4 ,  Issue: 1 )