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//Example 5.3
//Root locus for satellite attitude control with PD control.
xdel(winsid())//close all graphics Windows
clear;
clc;
//------------------------------------------------------------------
//System transfer function and its root locus
s=poly(0,'s');
sysS=(s+1)/(s^2);
evans(sysS,100)
//Title, labels and grid to the figure
exec .\fig_settings.sci; // custom script for setting figure properties
title(['Root locus for','$L(s)=G(s)=(s+1)/s^2$'],'fontsize',3)
zoom_rect([-6 -3 2 3])
h=legend('');
h.visible = "off"
//------------------------------------------------------------------
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