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14 Problem A8.18 OGATA 4ed(Nichols chart)



    Let's draw the Bode plot and the G(jw) locus on Nichols chart by Scilab.


    \begin{displaymath}G(s)=\frac{80\cdot e^{-0.1\cdot s}}{s\cdot (s+4)\cdot (s+10)}... ...t (2-0.1\cdot s)}{s\cdot (s+4)\cdot (s+10)\cdot (2+0.1\cdot s)}\end{displaymath}

    Scilab program(Bode plot) 
    clf;

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

g=80*(2-0.1*s)/(s*(s+4)*(s+10)*(2+0.1*s));

gs=syslin('c',g);

clf;

bode(gs);

     


    Image ProblemaA8-18

     

    Scilab program(Nichols chart) 
    clf;

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

g=80*(2-0.1*s)/(s*(s+4)*(s+10)*(2+0.1*s));

gs=syslin('c',g);

clf;

chart;

black(gs);

mtlb_axis([-250 -100 -50 50]);

     

    Image ProblemaA8-18b