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authorpriyanka2015-06-24 15:03:17 +0530
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+clc
+close
+//chapter 9: Stability Analysis
+//Example 9.3 page no 361
+//given
+clear
+wL=258
+s=poly(0,'s')
+h=syslin('c',(100/(s*(s/wL+1)^2 )))
+clf();bode(h,1,1000);
+disp('The open loop gain and the phase plots are given .It is seen that the crossover frequency is 15Hz,and the phase margin is 50degree')
+disp('We know that the overshoot can be increased by decreasing the phase margin.In fact,in this case selecting wL=233 rad/s corresponding to phase margin of 43.5degree gives an overshoot of 20persent')