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diff --git a/3885/CH5/EX5.18/Ex5_18.sci b/3885/CH5/EX5.18/Ex5_18.sci new file mode 100644 index 000000000..d5327b765 --- /dev/null +++ b/3885/CH5/EX5.18/Ex5_18.sci @@ -0,0 +1,16 @@ +//control systems by Nagoor Kani A
+//Edition 3
+//Year of publication 2015
+//Scilab version 6.0.0
+//operating systems windows 10
+// Example 5.28
+
+clc;
+clear;
+s=poly(0,'s')//defines s as poly nomial variable
+h=syslin('c',(s+2)/(s+1)*(s-1))//the given transfer function assigned to variable h
+scf()
+nyquist(h)
+show_margins(h,'nyquist')
+disp('open loop system is unstable')
+disp('closed loop system is stable;' )
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