Page 24 - ANALYSIS AND ROOT LOCUS DESIGN METHOD.pptx (A4 Document)

RULE #7 : Intersection with

Imaginary Axis

The objective is to find the intersection

point at which the locus crosses the

imaginary axis.

Points on root locus satisfy: Routh-

Hurwitz Criterion :-

Find the range of K for stable system

Take the range of Kmax and insert into

additional equation ( at S² row : refer

table R-H) to get the value of S1, S2 on

imaginary axis

jω?

jω?

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