1 files changed, 34 insertions, 0 deletions
diff --git a/28/CH10/EX10.7/ex10_7.sce b/28/CH10/EX10.7/ex10_7.sce
new file mode 100755
index 000000000..3912c4a67
--- /dev/null
+++ b/28/CH10/EX10.7/ex10_7.sce
@@ -0,0 +1,34 @@
+s=%s;
+syms Ka;
+g=(Ka/(s^2*(1+0.2*s)));
+// given Ka=10
+Ka=10;
+g=(10/(s^2*(1+0.2*s)));
+G=syslin('c',g)
+fmin=0.01;
+fmax=100;
+bode(G,fmin,fmax)
+show_margins(G)
+xtitle("uncompensated system")
+[gm,freqGM]=g_margin(G)
+[pm,freqPM]=p_margin(G)
+disp(gm,"gain_margin=")
+disp((freqGM*2*%pi),"gain margin freq=");
+disp(pm,"phase margin=")
+disp((freqPM*2*%pi),"phase margin freq=");
+disp("since P.M is negative so system is unstable")
+disp("selecting zero of lead compensating network at w=2.8 rad/sec and pole at w=14 rad/sec and applying gain to account attenuation factor.")
+gc=(1+0.358*s)/(1+0.077*s)
+Gc=syslin('c',gc)
+disp(Gc,"transfer function of lead compensator=");
+G1=G*Gc
+disp(G1,"overall transfer function=");
+fmin=0.01;
+fmax=100;
+bode(G1,fmin,fmax);
+show_margins(G1)
+xtitle("compensated system")
+[gm,freqGM]=g_margin(G1);
+[pm,freqPM]=p_margin(G1);
+disp(pm,"phase margin of compensated system=")
+disp((freqPM*2*%pi),"gain cross over frequency=")