[Scilab-users] Phase shift and step size in XCOS - electrical

[Serge Steer]

Le 23/03/2016 22:38, laftek a écrit :
> Thank you for such quick response.
>
> So far i found that there are 3 ways to get phase shift. But I am not sure
> if these are right solutions.
>
> *1.)*
>
> It´s the one I mentioned. I tried to reconstruct fourier block from MATLAB :
> http://postimg.org/image/l764cdb1v/ <http://postimg.org/image/l764cdb1v/>
>
> But there is atan2 block which i cant replace in xcos (undefined variable :
> atan2). So I found alternative to atan2(x,y) - atan(y/x) but there is
> singularity problem :
> http://postimg.org/image/4vg07lm91/ <http://postimg.org/image/4vg07lm91/>
>
> Any idea ?
The Scilab equivalent of Matlab atan2(x,y) is atan(x,y)
Serge
>
> *2.)*
>
> Very simple solution.
> <http://mailinglists.scilab.org/file/n4033842/reactivepowernew.jpg>
> <http://mailinglists.scilab.org/file/n4033842/2016-03-23_22_16_24-New_Microsoft_Word_Document.jpg>
>
> I succesfully got angle :
> http://postimg.org/image/mknvh4u3l/ <http://postimg.org/image/mknvh4u3l/>
>
> but if I am trying to implement rad to degree convertor block I am getting
> the same error : Singularity in a block :
> http://postimg.org/image/yqpfn5j31/ <http://postimg.org/image/yqpfn5j31/>
>
> Do you know some workaround ?
>
> *3.)*
>
> The last one : in this case I dont know how to transform it to xcos (zero
> crossing blocks) and I need to know what quadrant the angle is in.
> http://postimg.org/image/g6b851s2j/ <http://postimg.org/image/g6b851s2j/>
>
> quadrants :
> <http://mailinglists.scilab.org/file/n4033842/4quadr_darstellung.png>
>
>
> I know these are simple methods but it is all I got so far. Let me know if
> there is something wrong or some other way how to get angle between two
> signals.
>
> I would greatly appreciate any help. Thanks in advance.
>
>
>
>
>
> --
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