National Instruments Xmath Interactive Control Design Module ICDM - Manual (Page 47)

© National Instruments Corporation 5-1 Xmath Interactive Control Design Module
5
Root Locus Synthesis
This chapter describes the user interface, terminology, and parameters used
for root locus synthesis.
Overview
The Root Locus window performs two main functions:
• Displays selected gain and phase contours in the complex plane of the
loop transfer function.
• Allows the user to manipulate the controller transfer function
graphically by dragging controller poles and zeros, or dragging
the closed-loop poles along the root locus plot.
The Root Locus window only works in SISO mode.
Window Anatomy
The Root Locus Synthesis window is shown with the standard (default)
contour in Figure 5-1. The branches of the locus connect the zeros and
poles of the loop transfer function, which are shown in the plot. The
closed-loop poles, which are on the locus, also are shown.