Measurement of Four-Pole Parameters of Complex Structures

[+] Author and Article Information
F. B. Safford

Weights and Mechanical Analysis, Nortronics Division of Northrop Corporation, Hawthorne, Calif.

J. Eng. Ind 84(1), 15-20 (Feb 01, 1962) (6 pages) doi:10.1115/1.3667399 History: Received December 19, 1960; Online December 09, 2011


A method of measurement of the four-pole parameters of a system as a function of frequency is presented. This procedure consists of no-load dynamic measurements followed by measurements under a known load. From the foregoing measurements, the four-pole parameters of a system are derived. Application is made to an electrodynamic motion exciter with graphical presentation of the parameters with respect to amplitude, phase angle, real, and imaginary parts.

Copyright © 1962 by ASME
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