Constant Initial Value Not Working On LabVIEW's Integration Function

Updated Sep 26, 2024

Reported In

Software

  • LabVIEW

Issue Details

I need to add an initial value in the integration function, but when I add a constant value doesn't make a difference

Solution

This behavior is expected because the integration function expects an initial value with the same properties as the input signal, in this example ( a sin(x) integration ) our initial value will need to include magnitude, phase and offset, ( values equal to zero in a constant value). So, to include an initial value, we need a value that contains the same components. Here you can see a code example for this particular case:
KB-P002.png

You can see in the next picture the difference in the magnitude, phase, and offset between the original signal, the integration, and the integration with an initial value:
KB-P001.png
 
 

Additional Information

The example in this document is base in the sin(x) function integration. As we know:
KB-P003.png
From that, we know the magnitude and phase
  • Magnitude
KB-P004.png
  • Phase
KB-P005.png
  • Offset
Screenshot_24.png

Considering that we will see a difference in the output magnitude, phase and offset (C), so, these components are really important in the integration, and use a constant (with phase zero won't provide enough information).

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