integration of decaying acceleration signal

[Sehgal]

Hi

I have an experimental acceleration signal that is decaying with respect to time

I want to get velocity by integrating this signal. Practically the velocity signal should also decay with respect to time. But the integrated signal is not decaying ? Where am I making a mistake?

Corresponding VI and The Photo of the results are in the attached files.

Thanks in anticipation

[Sehgal]

Hi

I have an experimental acceleration signal that is decaying with respect to time

I want to get velocity by integrating this signal. Practically the velocity signal should also decay with respect to time. But the integrated signal is not decaying ? Where am I making a mistake?

Corresponding VI and The Photo of the results are in the attached files.

Thanks in anticipation

[johnsold]

I cannot open your VI as I have not yet installed LV 2012

Looking at your image I think that it is integrating your data. The x-axes are different so it is impossible to determine the exact correlation between the two graphs.  What I suspect is happening is that the decay is all contained in the first few small divisions at the left and the linear increase is the result of integrating a constant (offset) in the acceleration data.

Try subtracting the mean of the raw data from that data before integrating. That should eliminate the linear ramp and allow you to see the velocity decay component.

Lynn

[johnsold]

This question is also in the LV board.  Let's keep the discussion in one place.

Lynn