RMS for Non-Sinusoidal wave or Contain aliasing

Answer 1

[Mathieu NOE]

hello

if you have a signal (vector), the rms value is always (by definition)

rms_value = sqrt(mean(signal.^2))

[Akram chabaari]

thank you

I have a vector value of voltage (V) [ ]

and time scale 0:0.001:2

when plot (V,t)

i have the above relation between v,t as usual rms for sine wave =rms(v)

but here the wave is not pur sine wave

how i get rms value in this case

[Mathieu NOE]

hello

when a sine signal gets distorted , you can do the rms calculation either by computing each harmonic amplitude then rms value and combine them

this is explained here : https://www.lehmanengineering.com/quiz/quiz5sol.html

but you can do it also directly on the time data according to the definition I gave above

the rms means compute the equivalent dc signal which has the same power as your AC signal (distorded or not)

so I let you do the computation either in time or frequency domain