How to convert accelerometer data to find displacement graph

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Maaz Nayeem 2021-10-8

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https://ww2.mathworks.cn/matlabcentral/answers/1469521-how-to-convert-accelerometer-data-to-find-displacement-graph

回答： Bora Eryilmaz 2024-3-21

I have a triple axis accelerometer sensors. we are doing vibrational analysis for a Civil engg structure, we are able to successfully get raw data from the accelerometer (XYZ in g's). We transfered this raw data into matlab and did acceleration and Fast fourier transform plot to get frequency. We are stuck on writing the code to change the acceleration data into displacement. If anyone has any tips on where we should go with this, it would be greatly appreciated. Thanks in advance.I have attached the Accleration plot. I have tried using CumTrapz command but it dosent give proper results.

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采纳的回答

Mathieu NOE 2021-10-8

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https://ww2.mathworks.cn/matlabcentral/answers/1469521-how-to-convert-accelerometer-data-to-find-displacement-graph#answer_804151

在 MATLAB Online 中打开

hello

see my suggestion below

clc
clearvars
data = csvread('data.csv',1);        % time & Acceleration data
t = data(:,1);
acc = data(:,2);
acc = detrend(acc,'linear');
N = length(t);
dt = mean(diff(t));       % Average dt
fs = 1/dt;                  % Frequency [Hz] or sampling rate
% some additionnal high pass filtering
N = 4;
fc = 0.05; % Hz
[B,A] = butter(N,2*fc/fs,'high');
acc2 = filter(B,A,acc);
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
velocity = cumtrapz(dt,acc2);
velocity = detrend(velocity,'linear');
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
disp     = cumtrapz(dt,velocity);
%
figure(1)
subplot(311),plot(t,acc);
subplot(312),plot(t,velocity);
subplot(313),plot(t,disp);