Re: gEDA-user: RMS Waveform of a signal

[Rubén Gómez Antolí <lobo@xxxxxxxxxxxxxx>]

Again:

El 17/06/10 00:33, Rubén Gómez Antolí escribió:
> [...]

> Let's go to do the real test:
>
> octave:1> simu4=load Salida.S4.Tran.dat ;
> octave:2> tiempo=simu4(:,1);
> octave:3> i_neutro=simu4(:,2);
> octave:4> length(i_neutro)
> ans = 3334
> octave:5> valor_rms=sqrt(sum(i_neutro.*conj(i_neutro))/size(i_neutro,1))
> valor_rms = 26.597
>
> Ok, these 26.597 are the expected (and it can be calculated, and
> checked, too with Gnucap)

Thanks to Holger Vogt, we can check it too in Ngspice:

vmeasc#branch                                0
vmeasb#branch                                0
vmeasa#branch                                0
vneut#branch                                 0

 Reference value :  1.64847e-01

No. of Data Rows : 6443
             Transient Analysis

iout_rms            =   2.65992e+01 from=  0.00000e+00 to=  1.66660e-01

adding this to circuit file:

.tran 50us 166.66ms UIC
.measure tran iout_rms rms i(vneut) from=0 to=166.66ms

Original e-mail from Holger:

http://sourceforge.net/mailarchive/message.php?msg_name=4C190640.8010504%40uni-due.de

> [...]

> These aren't the expected wave, but, wait, if I use average of the
> wave_rms? (In somewhere I read that RMS wave are the average of RMS values)

http://home.olemiss.edu/~atef/engr360/tutorial/qgspice.html

At the end of the page you can read:

RMS(x) running RMS average of x over the range of the X axis variable.

Best regards.

Salud y Revolución.

Lobo.
--
Libertad es poder elegir en cualquier momento. Ahora yo elijo GNU/Linux,
para no atar mis manos con las cadenas del soft propietario.
---------
Desde El Ejido, en Almería, usuario registrado Linux #294013
http://www.counter.li.org


_______________________________________________
geda-user mailing list
geda-user@xxxxxxxxxxxxxx
http://www.seul.org/cgi-bin/mailman/listinfo/geda-user