69 lines
960 B
Matlab
69 lines
960 B
Matlab
%close all;
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clear all;
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clc
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figure(1);
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tmpu = load('../tmp/u1');
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tmpi = load('../tmp/i1');
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t = tmpu(:,1);
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u = tmpu(:,2);
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subplot(2,2,1);
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title('u_1 TD');
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plot(t,u);
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xlabel('t \rightarrow');
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ylabel('ut_1 \rightarrow');
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grid on;
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dt=t(2)-t(1);
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u= [u ; zeros(5000,1)];
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L=numel(u);
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t = (1:L)*dt;
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f = (0:L-1)/L/dt;
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fu = fft(u)/L;
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subplot(2,2,2);
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title('u_1 FD');
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plot(f(1:L/2),abs(fu(1:L/2)));
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xlabel('f \rightarrow');
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ylabel('|uf_1| \rightarrow');
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grid on;
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t = tmpi(:,1);
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i = tmpi(:,2);
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subplot(2,2,3);
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title('i_1 TD');
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plot(t,i);
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xlabel('t \rightarrow');
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ylabel('it_1 \rightarrow');
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grid on;
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dt=t(2)-t(1);
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i = [i; zeros(5000,1)];
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L=numel(i);
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t = (1:L)*dt;
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f = (0:L-1)/L/dt;
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fi = fft(i)/L;
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subplot(2,2,4);
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title('i_1 FD');
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plot(f(1:L/2),abs(fi(1:L/2)));
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xlabel('f \rightarrow');
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ylabel('|if_1| \rightarrow');
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grid on;
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figure(2);
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subplot(2,1,1);
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plot(f,real(fu./fi));
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xlim([0 1e9]);
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grid on;
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subplot(2,1,2);
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plot(f,imag(fu./fi));
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xlim([0 1e9]);
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grid on;
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