When measuring voltage across a shunt and computing the RMS values of a PWM with dither signal on a solenoid, what time should I average this across? RMS equates the voltage across the period, so should I always use the RMS value over a period to give an output? Or do I use point by point RMS outputs? I would like to do this with hardware(possibly AD536A), but I cannot set a period to integrate across because the frequency is variable. Also, since I am using dither, should I take RMS of the dither frequency instead of the base frequency? I will have a raw shunt output, and an RMS output, so it may not be necessary to show the affect of the dither in the RMS output, in that case I would take RMS over the slower dither frequency.
Or, is the period that I integrate across ambiguous because the average should work out the same over time, as long as the time is greater than the slowest frequency?
Thanks in advance!
Or, is the period that I integrate across ambiguous because the average should work out the same over time, as long as the time is greater than the slowest frequency?
Thanks in advance!
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