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

[Stefan Du Rietz]

RMS value: And divide the integral by the evaluation time and take the square root!

/Stefan


On 2008-09-02 21:38, Michael J. McCann wrote:
--------------------
> 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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