Author(s)

G.J. Eastman & N.K. Sinha

Abstract

Invited Paper Computer program for root locus plots G.J. Eastman," N.K. Sinha* " Department of Applied Mathematics, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1 * Department of Electrical & Computer Engineering, McMaster University, Hamilton, Ontario, Canada L8S 4L7 ABSTRACT A computer program has been developed for plotting the root locus of the characteristic polynomial of a closed-loop system, either in the s-plane or the z-plane. The program can be run on an IBM-compatible personal computer with EGA or VGA colour graphics. The roots of the characteristic polynomial are calculated for a sequence of values of a parameter, each root is assigned to the appropriate branch of the root locus, and the root locus is plotted. The plot can be examined in detail by a movable cursor. The program can be run in either a test mode or a production mode. The test mode automatically executes a set of 20 instructive example problems either in the s-plane or the z-plane. The

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