4 files changed, 62 insertions, 0 deletions
diff --git a/Working_Examples/3432/CH6/EX6.9/DEPENDENCIES/fig_settings.sci b/Working_Examples/3432/CH6/EX6.9/DEPENDENCIES/fig_settings.sci
new file mode 100755
index 0000000..5d5e7d4
--- /dev/null
+++ b/Working_Examples/3432/CH6/EX6.9/DEPENDENCIES/fig_settings.sci
@@ -0,0 +1,9 @@
+//------------------------------------------------------------------
+//figure handel settings
+f=get("current_figure"); //Current figure handle
+f.background=8; //make the figure window background white
+l=f.children(1); 
+l.background=8 ;//make the text background white
+id=color('grey');
+xgrid(id);
+//------------------------------------------------------------------
diff --git a/Working_Examples/3432/CH6/EX6.9/Ex6_9.sce b/Working_Examples/3432/CH6/EX6.9/Ex6_9.sce
new file mode 100755
index 0000000..a66b127
--- /dev/null
+++ b/Working_Examples/3432/CH6/EX6.9/Ex6_9.sce
@@ -0,0 +1,53 @@
+//Example 6.9
+// Nyquist plot for a third order system.
+
+xdel(winsid())//close all graphics Windows
+clear;
+clc;
+//------------------------------------------------------------------
+//System transfer function 
+s=poly(0,'s');
+g=syslin('c',1/(s*(s+1)^2));
+
+//The bode plot of the system
+fmin=0.01/2/%pi;
+fmax=100/2/%pi;
+//[frq,repf]=repfreq(g1,fmin,fmax,0.01);
+bode(g,fmin,fmax,"rad");
+frq=[1,10]/2/%pi;
+[frq, repf]=repfreq(g,frq);
+[db, phi]=dbphi(repf);
+plot(frq*2*%pi,db,'ro');
+exec .\fig_settings.sci; //custom script for setting figure properties
+title(["Bode plot for","$G(s)=1/[s(s+1)^2]$"],'fontsize',3)
+//zoom_rect([[0.1 0] -70 [12 -180] 20])
+xset("font size", 3);
+
+xstring(1,0,"$C\,\, (\omega=1)$",0,0);
+xstring(2,-75,"$E\,\, (\omega=10)$",0,0);
+f=gca();
+
+//------------------------------------------------------------------
+//The nyquist plot of the system
+figure;
+nyquist(g,0.8/2/%pi,10/2/%pi,0.02)
+
+exec .\fig_settings.sci; //custom script for setting figure properties
+title(["Nyquist plot for","$G(s)=1/[s(s+1)]^2$"],'fontsize',3)
+f=gca();
+f.x_location = "origin";
+f.y_location = "origin";
+zoom_rect([-1 -0.2 0.5 0.2]);
+xset("clipping", -1.2, 0.2, 1.4,0.4);
+xset("font size", 3);
+xset("color",2);
+xstring(-0.6,0.1,"${\fgcolor{blue}{\omega<0}}$",0,0);
+xstring(-0.6,-0.1,"${\fgcolor{blue}{\omega>0}}$",0,0);
+xstring(-0.7,0.005,"${\fgcolor{blue}{\omega=\pm 1}}$",0,0);
+xstring(-1,-0.2,...
+"${\fgcolor{blue}{\text{From \infty at \omega=0^+}}$",0,0);
+ xstring(-0.7,0.15,"${\fgcolor{blue}...
+ {\text{Towards \infty at \omega=0^-}}$",0,0);
+xstring(-0.525,-0.04,"C",0,0);
+xstring(-0.075,0,"E",0,0);
+//------------------------------------------------------------------
diff --git a/Working_Examples/3432/CH6/EX6.9/Ex6_9_f0.pdf b/Working_Examples/3432/CH6/EX6.9/Ex6_9_f0.pdf
new file mode 100755
index 0000000..0717e6c
--- /dev/null
+++ b/Working_Examples/3432/CH6/EX6.9/Ex6_9_f0.pdf
diff --git a/Working_Examples/3432/CH6/EX6.9/Ex6_9_f1.pdf b/Working_Examples/3432/CH6/EX6.9/Ex6_9_f1.pdf
new file mode 100755
index 0000000..482ef93
--- /dev/null
+++ b/Working_Examples/3432/CH6/EX6.9/Ex6_9_f1.pdf