Calculate velocity!

[Eric_LV]

There is a Derivative function in LabVIEW in the Control Design and Simulation Toolkit. You can read more about it in the link below.  

http://zone.ni.com/reference/en-XX/help/371894F-01/lvsim/sim_derivative/

[DFGray]

You can also use the Savitzky-Golay coefficients VI with a convolution VI to calculate derivatives using multiple points.

[0862194672]

Hi,

I have measured velocity the same way as you are saying but I would like to add a filter to that how can I do that. I tried  Butterworth Filter.vi, and Butterworth Filter PtByPt.vi but the filtered value that I get is "NaN". please help me with this.

[crossrulz]

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0862194672 wrote:

I have measured velocity the same way as you are saying but I would like to add a filter to that how can I do that. I tried  Butterworth Filter.vi, and Butterworth Filter PtByPt.vi but the filtered value that I get is "NaN". please help me with this.

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Show us your code.  We can't magically debug your code without seeing it.