Dear All
I am trying to analyse acceleration in the frequency domain. Here is my code to transfers time domain to frequency domain. I want the axis y in m/s2. Someone who can help me? Because now I am obtaining magnitude vs frequency (frequency domain).
myData = xlsread('Book1.xls');
t = 0:0.01:19.99;
s=myData(:,1);
Ts=mean(diff(t));
fs=1/Ts;
L=length(s);
NFFT=2^nextpow2(L);
M=L+1;
y=fft(s,NFFT);
mag=abs(y);
mag=mag*2/NFFT;
f=fs/2*linspace(0,1,NFFT/2+1);
figure;
plot(f(1:M/2),mag(1:M/2));
xlabel('Frequency (Hz)')
ylabel('Magnitude')
grid
Thanks
Natividad Garcia Troncoso
Hello! In the axis y after the FFT I get 0.07. My Maximum acceleration in time domain is 0.049.
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