I would like to know what is the most accurate way to compute a measured signal's fundamental RMS value as a function of time.
The following is true for the considered signal:
- signal represents a voltage
- sample rate:
fs = 6 kHz
- capture time:
t = 100 s
- fundamental frequency:
f1 = 60 Hz
- signal is not a pure sinusoidal but has additional frequency content
- amplitude of the signals fundamental changes slowly over time