Phase shift in in FFT Harmonics results

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Dom 2022-2-12

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https://ww2.mathworks.cn/matlabcentral/answers/1648190-phase-shift-in-in-fft-harmonics-results

编辑： Dom 2022-2-12

Hi Guys,

I am using the fft_powerscope function to evalute a simulink output signal. My problem is, that the recreated signal does not ressemble the original signal. There seems to be a phase shift somewhere. Can you help me find the error? I shared all the data that I used.

order= z_46.fft_iabc.freq./z_46.fft_iabc.fundamental;

phase= z_46.fft_iabc.phase;

for y=1:length(phase)

phase2(y,1)=phase(y)-phase(2)*(y-1);

end

fs = 1000;

Ts = 1/fs;

duration = 10;

t = 0 : Ts : duration-Ts;

mag= z_46.fft_iabc.mag./ z_46.fft_iabc.magFundamental;

x=mag(1);

M=[order,mag,phase2];