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+//Example 6.10

+// Nyquist plot for an Open-loop unstable system.

+

+xdel(winsid())//close all graphics Windows

+clear;

+clc;

+//------------------------------------------------------------------

+//System transfer function 

+s=poly(0,'s');

+sysG=(s+1)/(s*(s/10-1));

+evans(sysG,50)

+exec .\fig_settings.sci; //custom script for setting figure properties

+title(["Root Locus for","$G(s)=(s+1)/[s(s/10-1)]$"],'fontsize',3)

+zoom_rect([-5 -4 5 4])

+f=gca();

+f.x_location = "origin"

+f.y_location = "origin"

+h=legend('');

+h.visible = "off"

+

+g1=syslin('c',(s+1)/(s*(s/10-1)));

+//------------------------------------------------------------------

+//The bode plot of the system

+figure;

+bode(g1,0.1/2/%pi,100/2/%pi,"rad")

+exec .\fig_settings.sci; //custom script for setting figure properties

+title(["Bode plot for","$G(s)=(s+1)/[s(s/10-1)]$"],'fontsize',3)

+//bode(g,2*%pi*0.1,2*%pi*100)

+//------------------------------------------------------------------

+figure;

+//The nyquist plot of the system

+nyquist(g1,0.5/2/%pi,100/2/%pi,0.05)

+exec .\fig_settings.sci; //custom script for setting figure properties

+title(["Nyquist plot for","$G(s)=(s+1)/[s(s/10-1)]$"],'fontsize',3)

+f=gca();

+f.x_location = "origin";

+f.y_location = "origin";

+zoom_rect([-2 -2 1 2]);

+xset("color",2);

+xset("font size", 3);

+xstring(-1,1.5,"${\fgcolor{blue}{\omega>0}}$",0,0);

+xstring(-1,-1.5,"${\fgcolor{blue}{\omega<0}}$",0,0);

+xstring(-1.5,0,"${\fgcolor{blue}{\omega=\pm \sqrt{10}}}$",0,0);

+xstring(-0.5,0.1,"${\fgcolor{blue}{\omega=\infty}}$",0,0);

+xarrows([-0.2;0],[0.2;0],-1,2)

+//------------------------------------------------------------------

diff --git a/3432/CH6/EX6.10/Ex6_10_f0.pdf b/3432/CH6/EX6.10/Ex6_10_f0.pdf
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diff --git a/3432/CH6/EX6.10/Ex6_10_f1.pdf b/3432/CH6/EX6.10/Ex6_10_f1.pdf
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+++ b/3432/CH6/EX6.10/Ex6_10_f1.pdf