MATLAB (8)

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Lead-Lag Compensation

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>> num=[4];
>> den=[1 0.5 0];
>> v=[-5 5 -5 5];
>> axis(v);

axis-1

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>> rlocus(num,den);
>> axis(v);

rlocus
axis-2

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>> rlocus(num,den);
>> grid on
>> hold on

grid-on

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>> numc=[25.04 5.008];
>> denc=[1 5.03247 0.0626 0];
>> rlocus(numc,denc);

lead-lag-compensation

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>> den=[1 0.5 4];
>> denc=[1 5.0327 25.1026 5.008];
>> t=0:0.1:10;
>> step(num,den,t);
>> hold on
>> step(numc,denc,t);
>> grid on

step-response

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>> step(num,den,t);
>> den=[1 0.5 4 0];
>> step(num,den,t);
>> hold on
>> denc=[1,5.0327 25.1026 5.008 0];
>> step(numc,denc,t);
>> plot(t,t,'k');
>> grid on

ramp-response