Problem with convert acceleration to velocity and displacement

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vu ngothanh 2016-6-9

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回答： Bora Eryilmaz 2024-3-21

Hi everyone,

I used DAQ to get acceleration, however, when I convert accleration to velocity and displacement (using 'cumtrapz' function) is not OK like the picture below:

Problem is that the velocity and displacement is increase with time. What i need to do make the velocity and displacement stable around 0.

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Jos (10584) 2016-6-9

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Apparently there is an offset in your acceleration data. You can subtract a running mean

A(k) = ValueFromDaq - mean(A(1:k-1))

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Jos (10584) 2016-6-10

Good suggestion, Star Strider, to use the median.

vu ngothanh 2016-6-13

Dear Mr Jos and Star Strider,

at last, I found "detrend" function. I think that is the best solution for this situation.

Thank you for you all for helping me.

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Bora Eryilmaz 2024-3-21

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The new convertVibration function in MATLAB R2024a release of the Predictive Maintenance Toolbox lets you compute baseline-corrected and filtered acceleration, velocity, and displacement signals from vibration measurements using a single sensor output from either an accelerometer, velocity sensor, or displacement sensor.