[scilab-Users] Scicos an idea for "The effective value of a wave" function?

[Michael J. McCann]

To generate a wave....
In principle you should be able to make a loop of 
two integrators in series. If each has the same 
gain then they will deliver the phase and 
quadrature signals (0 deg and 90 deg). I have 
done it with other numerical integrating 
simulators but as it's on the verge of 
instability it can be tricky to get it to run 
well for very many cycles. Initial conditions are 
usually 1 and zero for the two integrators 
respectively. I admit to not having tried it in 
Scicos, but have done it on a real analog 
computer with a bit of saturation to prevent it going unstable.

On the other hand if what you want is the RMS 
value (root mean square value) of some arbitrary 
signal then multiply it by itself and integrate, 
sampling the integrator and resetting it to get a 
periodic evaluation. If you need to remove the 
mean and look only at the residual oscillation, 
then  the signal has to be integrated alone to 
get a measure of the mean in the same way, then a 
bit of arithmetic will give the RMS of the "wave" part.

I hope this helps, but please accept my apologies 
if I have totally misunderstood the question.

Mike.
Dr Mike McCann
McCann Science.
======================================
At 16:49 2008-09-02, you wrote:
>M. Jean Luc Bélondrade
>1 Domaine de la Haute Borne
>27700 Hennezis
>
>Hello,
>Actualy i can't make with scicos standards blocks a function to do "The
>effective value of a wave"
>Do you have an idea ?
>Thank you for your help
>See you soon
>
>Bonjour,
>Actuellement je n'arrive pas à faire avec les blocks standard scicos une
>fonction réalisant la valeur efficace d'un signal.
>Avez-vous une idée ?
>
>
>A bientôt et merci pour votre aide
>Jean Luc
>
>
>
>
>
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