8 Problem A8.4 OGATA 4ed (Bode plot)

Laplace.T	Root-locus	Transient response	Frecuency response

8 Problem A8.4 OGATA 4ed (Bode plot)
Let's plot Bode plot of the feedback close-loop system for the values by Scilab. The open-loop transfer function is:

$\begin{displaymath}G(s)=\frac{K}{s\cdot(s+1) \cdot(s+5)}\end{displaymath}$
Scilab program
clf;

s=%s/(%pi*2);

K=[1 10 20];

for i=1:3,

g(i)=K(i)/(s*(s+1)*(s+5));

gc(i)=g(i)/. 1;

gcs(i)=syslin('c',gc(i));

end;

bode([gcs(1);gcs(2);gcs(3)]
,0.1,100,['K=20';'K=10';'K=1']);