Construction of Root Locus Curves

The root loci start (X, = 0) at thepofes of the system openloop transfer function [Pg.357]

The number of loci is equal to the order of the system, i.e., the number of poles [Pg.358]

4 The complex parts of the curves always appear as complex conjugates. [Pg.358]

Rules I to 4 are fairly self-evident. Rule 5 comes from the fact that at a point on the root locus plot the complex number s must satisfy the equation / [Pg.358]

Therefore, the argument of on a root locus must always be [Pg.358]

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