updated the code

1 files changed, 15 insertions, 14 deletions

diff --git a/104/CH9/EX9.10/9_10.sce b/104/CH9/EX9.10/9_10.sce
index 4a6b9ba64..05d092f3b 100755
--- a/104/CH9/EX9.10/9_10.sce
+++ b/104/CH9/EX9.10/9_10.sce
@@ -1,15 +1,16 @@
-//multiple loop systems

-s=%s

-innerloop=syslin('c',6/s*(s+1)*(s+2))

-nyquist(innerloop)

-show_margins(innerloop,'nyquist')

-printf("nyquist plot intersects jw axis at -1 so innerloop is marginally stable")

-outerloop=syslin('c',100*(s+0.1)/(s+10)*(s^3+3*s^2+2*s+6))

-//nyquist(outerloop)

-show_margins(outerloop,'nyquist')

-P=0//no of poles on RHP

-Pw=2//no of poles on jw axis

-theta=-(Z-P-0.5*Pw)*180

-Z=0//for outer loop to be stable

-disp(theta,"theta for stability=")

+//multiple loop systems
+s=%s;
+Z = 0; 
+innerloop=syslin('c',6/s*(s+1)*(s+2))
+nyquist(innerloop)
+show_margins(innerloop,'nyquist')
+printf("nyquist plot intersects jw axis at -1 so innerloop is marginally stable")
+outerloop=syslin('c',100*(s+0.1)/(s+10)*(s^3+3*s^2+2*s+6))
+//nyquist(outerloop)
+show_margins(outerloop,'nyquist')
+P=0//no of poles on RHP
+Pw=2//no of poles on jw axis
+theta=-(Z-P-0.5*Pw)*180
+Z=0//for outer loop to be stable
+disp(theta,"theta for stability=")
 printf("theta as seen from nyquist plot is same as that required for stability \n hence outer loop is stable")
\ No newline at end of file