Integrate acceleration to velocity and displacement

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tupac1971ful 2016-3-25

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评论： Sebastián Santibáñez Brito 2023-4-4

I have taken 5000 measurements for acceleration with its acceleration's respective time. I created 2 vectors: for my acceleration measurements named "acceleration" and for time named "time". Which commands should i use exactly to intergate? I tried : velocity=cumtrapz(acceleration,time) & displacement=cumtrapz(velocity,time) and then to do the diagrams plot(time,velocity) & plot(time,displacement). Is that correct, or should i try another commands?

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Answer 1

John D'Errico 2016-3-25

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编辑：John D'Errico 2016-3-25

在 MATLAB Online 中打开

It looks close to good to me. Why do YOU think there is a problem?

Hint: Read the help for the tools you will use. In this case, cumtrapz.

When there are two arguments to cumtrapz, they should be in the order cumtrapz(x,y). Again, from the help, it shows this:

Z = cumtrapz(Y)
Z = cumtrapz(X,Y)

With only one argument, so an implicit X step of 1, you just pass in Y. With two arguments, i.e., acceleration and time, they must go in the proper order.

So, if you will integrate acceleration over time,

velocity = cumtrapz(time,acceleration);

Similarly, the second integral must have its arguments in the proper order.

READ THE HELP.

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Maaz Nayeem 2020-2-3

check the graphs with seismo signal software.

Sebastián Santibáñez Brito 2023-4-4

@tupac1971ful

hey, I think it's too late, but the correct order is (time, acceleration) (you can check the cumtrapz documentation). I asked a friend of mine, and it's normal that the speed doesn't look right. You can use detrend to kinda fix it.

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