1 files changed, 11 insertions, 0 deletions
diff --git a/1151/CH7/EX7.9/example_9.sce b/1151/CH7/EX7.9/example_9.sce
new file mode 100755
index 000000000..87a4193ae
--- /dev/null
+++ b/1151/CH7/EX7.9/example_9.sce
@@ -0,0 +1,11 @@
+s=%s;
+num=(1-s);
+den=(s+1);
+ansys=syslin('c',(num/den));
+nyquist(ansys,-1,1000);
+printf("When K>1:nobopen loop pole is on right half of the s plane P=0");
+printf("number of encirclement of point(-1+j0)N=1\n N=Z-P\n1=Z-0\n Z=1");
+printf("hence the system is unstable")
+printf("When K<1: P=0");
+printf(" N=0\n Z=0");
+printf("hence the system is stable")