Convert Time Domain Signal Data into Frequency Domain

2 visualizaciones (últimos 30 días)
neamah al-naffakh
neamah al-naffakh el 13 de Ag. de 2016
Comentada: Rehanos_boyzee el 4 de Feb. de 2020
Hi, I have dataset that contains time stamp and the acceleration data of three axes( x, y, and z) then i the data has been stored in an array called Segments This is an example of my data
Time stamp X Y Z
0 1.0195313 0.16088867 -0.26391602
0 1.0976563 0.17456055 -0.33447266
0 1.2556152 0.24926758 -0.3774414
0 1.2314453 0.517334 -0.25732422
0 1.0212402 0.5761719 -0.09277344
0 1.0727539 0.51000977 0.007324219
0 1.1694336 0.32885742 -0.017822266
0 1.1247559 0.22924805 -0.10595703
0 1.0339355 0.27905273 -0.13623047
0 0.8273926 0.24560547 -0.080566406
0 0.75097656 0.25390625 -0.018310547
0 0.67626953 0.3046875 0.051757813
0 0.7282715 0.33764648 0.08911133
0 0.8227539 0.34545898 0.08325195
0 0.87939453 0.3413086 0.08300781
0 1.0527344 0.34326172 0.106933594
0 1.1125488 0.32128906 0.10058594
0 1.1477051 0.26416016 0.06347656
0 1.2807617 0.2680664 0.015136719
0 1.2800293 0.2668457 -0.006347656
1 0.7998047 0.2043457 -0.22460938
1 0.89868164 0.16308594 -0.18432617
1 0.9472656 0.107177734 -0.19458008
1 1.0109863 0.08178711 -0.20800781
1 1.0375977 0.111328125 -0.17626953
1 0.96313477 0.13378906 -0.13134766
1 1.0727539 0.15991211 -0.08935547
1 1.041748 0.2055664 -0.0637207
1 0.9003906 0.2607422 -0.013183594
1 0.94677734 0.23095703 0.025390625
1 1.0883789 0.24560547 0.021240234
1 1.1467285 0.22265625 -0.029785156
1 1.1020508 0.23388672 -0.08325195
1 0.88549805 0.22949219 -0.068603516
1 0.8017578 0.24829102 -0.03857422
1 0.83569336 0.27197266 -0.024902344
1 0.8642578 0.34106445 -0.037353516
1 0.91308594 0.3779297 -0.017333984
1 1.0136719 0.43603516 0.04321289
1 1.0756836 0.45166016 0.06567383
1 1.0771484 0.37670898 0.028076172
I have converted the time domain signal into frequency domain signal using *fft* function
I have sent the data of x-axis only into FFT function as illustrated in the following commands
% FFTS = fft(X_Segments)
plot(FFTS)
NOTE( X_Segments is an array that contains the acceleration data of X-axis only)
the graph was so strange!as shown in the pic
Can anyone help me? Thank you so much
  6 comentarios
neamah al-naffakh
neamah al-naffakh el 13 de Ag. de 2016
thank you so much mate, see the following graph! I have got only one peak for 320 value of X data !
Rehanos_boyzee
Rehanos_boyzee el 4 de Feb. de 2020
Can you please share your code as im trying to do something similar

Iniciar sesión para comentar.

Respuestas (1)

Image Analyst
Image Analyst el 13 de Ag. de 2016
Did I help you above such that you have no more questions?
  2 comentarios
neamah al-naffakh
neamah al-naffakh el 13 de Ag. de 2016
iI am not sure to be honest, I am wondering if the graph is correct or not? because when I draw the data in time domain i got many peaks in the signal ! while I got only on in frequency domain signal?
Image Analyst
Image Analyst el 13 de Ag. de 2016
In general, you could have lots of peaks in both domains due to a variety of reasons.

Iniciar sesión para comentar.

Categorías

Más información sobre Parametric Spectral Estimation en Help Center y File Exchange.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by