Root Locus Example #1

MATLAB Code




%         ***** MATLAB Code Starts Here
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%ROOT_LOCUS_01_MAT

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fig_size = [232 84 774 624];

olz = [-1; 1+j; 1-j]; % open-loop poles and zeros

olp = [0; -0.5; -2; -2; -1+j; -1-j];

%

num = real(poly(olz)); % open-loop transfer function

den = real(poly(olp));

%

figure(1),clf,root_locus(num,den);

title('K > 0'),set(gcf,'Position',fig_size)

%

figure(2),clf,root_locus(-num,den);

title('K < 0'),set(gcf,'Position',fig_size)

 

 
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%         ***** MATLAB Code Stops Here

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