Hi,
I have a signal in time domain, actually, specific kinetic energy was calculated in time domain and its medium value is 10 m2/s2 (with some peak at 60 m2/s2). I wanted to obtain the Fourier transform of this signal in time domain. Then I did an FFT on the signal and converted to frequency domain; but the amplitude of this kinetic energy in frequency domain is at the magnitude order of 10e6. Why this difference? Should I normalize this FFT in some way to obtain the Fourier trasform? If I do the fft the unit lenght is m2/s2, while if I do the Fourier trasform the unit lenght should be m2/s, so I thought that my problem could be due to a normalization
This is the code (the tket.txt contain the signal, which can be read at the 34th column) can you help me?
tket1=readtable('tket.txt');tket=table2array(tket1);Tinc=0.001;% Tinc is the time step
Fs=1/Tinc;L=length(tket);f = Fs*(0:(L/2))/L;tkef1= fft(tket(:,34:34),L);fl=length(f);tkef=tkef1(1:fl,:);
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