initial commit / add all books

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
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+

+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