1 files changed, 27 insertions, 0 deletions
diff --git a/1340/CH6/EX6.3/6_3.sce b/1340/CH6/EX6.3/6_3.sce
new file mode 100755
index 000000000..847ad066b
--- /dev/null
+++ b/1340/CH6/EX6.3/6_3.sce
@@ -0,0 +1,27 @@
+
+clc;
+//stability via reversing coefficients
+s = poly(0,'s');
+tf = syslin('c',10/(s^5+2*s^4+3*s^3+6*s^2+5*s+3));
+deno = denom(tf);
+coef = coeff(deno);
+
+//reversing coefficients of tf 
+tf2 = poly([coef(6) coef(5) coef(4) coef(3) coef(2) coef(1)],"s","coeff");
+disp(tf2);
+x = routh_t(tf2);//using routh_t function to generate the routh table
+disp(x);
+c = 0;
+for i=1:length(coef)
+    if(x(i,1)<0)
+      c = c+1;
+      end
+end
+if  (c>=1)
+    printf("system is unstable");
+    else printf("system is stable")
+    
+end
+//since there is sign change in the first column of the table
+// the system is unstable
+//note: the first column does not contain any zeroes