Curriculum and Labs for Engineering Education

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myDAQ homework problem: AC Circuits > RMS Value > Arbitrary Waveform

Problem Statement: Determine the average value and effective DC value (also called RMS value) of the periodic waveform.

waveform.png

Analysis:

myDAQ Measurement:

  • Create v(t) with NI ELVISmx Arbitrary Waveform Generator; use 50 kS/s update rate
  • Extract average value with RC lowpass filter (R = 10 kW, C = 100 mF)
  • Observe v(t) and filtered version with NI ELVISmx Oscilloscope
  • Report average value and effective value as read from oscilloscope numerical display
  • Follow along with the video clip below to confirm correct operation of your measurement setup:

Comparison:

  • Report percentage difference between calculated values and measured values
  • Include screenshot of oscilloscope display
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