XML
Loading
Laplace.T Root-locus Transient response Frecuency response
       
 
 
 

6 Program 6.7 OGATA 4edition (root locus, damping ratio)




Let us calculate the roots-locus with indication of damping ratio $\zeta$=0.5 by Scilab, a closed loop system with feedback unit whose transfer function in open-loop is:

\begin{displaymath}G(s)=\frac{K}{(s^{3}+4\cdot s^{2}+5\cdot s)}\end{displaymath}


Program in Scilab
num=poly([1 0 0 0],'s','coeff');
den=poly([0 5 4 1],'s','coeff');
g=syslin('c',num/den);
evans(g);
clf;
v=[-3 1 -2 2];
mtlb_axis(v)
sgrid([0.5],[0],32);

 

Image Programa6_7

cajael