I have done the FFT analysis of a real time data. Please check weather am i right or not ?

8 次查看（过去 30 天）

显示更早的评论

GOURANG UPADHYAY 2022-7-6

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1754560-i-have-done-the-fft-analysis-of-a-real-time-data-please-check-weather-am-i-right-or-not

评论： Abderrahim. B 2022-7-7

采纳的回答： Abderrahim. B

sing2.txt

在 MATLAB Online 中打开

clc;

clear;

close all;

%%Time Domain Plot

vib1=readtimetable("sing2.txt","SampleRate",1);

tiledlayout(5,1)

nexttile

plot(vib1.Time,vib1.Sing1)

N=length(vib1.Sing1);

xlabel("Time(s)")

ylabel("Ampl(mm/s^2)")

%% FFt

fs=1;%Sampling Frequency

delt=seconds(1/fs); %time step

t=0:1:length(vib1.Sing1)-1;

Totaltime=(length(vib1.Sing1)-1);

my_fft=2/N*(fft(vib1.Sing1));%FFT of Signal

abs_fft=abs(my_fft); %Absolute value of fft

delf=1/Totaltime; %Frequency Resolution

n2=1:1:N/2; %fft results are plotted for N/2 data points

fk=delf*n2;% frequency values

nexttile

plot(fk,abs_fft(1:N/2))

[v,p]=findpeaks(abs_fft(1:N/2),fk,'Threshold',0.03);

findpeaks(abs_fft(1:N/2),fk,'MinPeakHeight',0.03)

xlabel("Frequency (Hz)")

ylabel("Ampl(mm/s^2)")

%%Spectral density

nexttile

pspectrum(vib1.Sing1,vib1.Time,"spectrogram")

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Abderrahim. B 2022-7-6

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1754560-i-have-done-the-fft-analysis-of-a-real-time-data-please-check-weather-am-i-right-or-not#answer_1001420

编辑：Abderrahim. B 2022-7-6

Spectral_Analaysis.jpg

Hi!

Looks correct to me your spectral analysis!

Screenshot from Signal Analyzer App. This app allows MATLAB script generation.

HTH!

10 个评论
显示 8更早的评论隐藏 8更早的评论

GOURANG UPADHYAY 2022-7-7

ok bro

Abderrahim. B 2022-7-7

If this answer helped you accept it.

请先登录，再进行评论。

类别

Signal Processing Signal Processing Toolbox Spectral Analysis Spectral Estimation

在 Help Center 和 File Exchange 中查找有关 Spectral Estimation 的更多信息

Community Treasure Hunt

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

Start Hunting!

Translated by