How can I calculate the Peak acceleration from IMU output file?

I'm trying to calculate the cumulative acceleration from IMU file. (Attached) Can I use this code (https://www.mathworks.com/matlabcentral/answers/453374-converting-accelerometer-data-to-frequency#answer_368192) and what should I change? Thanks in advance

[David Hill]

What is the big picture? Are you trying to get velocity in each direction?

[Newbie]

No I'm trying to calculate the total acceleration from this equation xyz = sqrt(x^2 + y^2 + z^2)

[David Hill]

But total acceleration is not the same as cumulative acceleration. Instanteous acceleration (collected) is only valid at the time it was collected unless you do some kind of averaging/filtering.

[James Tursa]

Is there any rotational motion?

[Newbie]

My bad. I actually need the peak acceleration. Should I use findpeaks function instead?

[Newbie]

@James

There should be internal and external rotation as this sensor is attached to lower leg

Answer 1

[David Hill]

num = xlsread('test550.xlsx');
peakAcc=max(vecnorm(num(:,3:5)'));

[Newbie]

Thanks a lot!