Przemek Klosowki,
accuracy of 95% is requiered, not much.
El viernes, 27 de enero de 2017, 2:10:27 (UTC-2), Renzo Fabián escribió:
>
>
> I have the following C code's parts that uses tables of sins and cosins to
> calculate a fundamental phasor of 60 Hz electrical system using 16 samples
> per cycle (960 Sps):
>
> float cosins[]={1, 0.92388, 0.70711, 0.38268, 0, -0.38268, -0.70711,
> -0.92388, -1,
> -0.92388, -0.70711, -0.38268, 0, 0.38268, 0.70711, 0.92388};
>
> float sins[]={0, 0.38268, 0.70711, 0.92388, 1, 0.92388, 0.70711, 0.38268,
> 0,
> -0.38268, -0.70711, -0.92388, -1, -0.92388, -0.70711,
> -0.38268};
>
> ...
>
> for(i=0; i <16; i++){
> ret_r=x[15-i]*cosins[i]+ret_r;
> ret_i=x[15-i]*sins[i]+ret_i;
> }
>
> return 0.088388*ret_r -0.088388*ret_i*I;
>
> Is it possible to perform this using the libpruio in order to read 6
> analog inputs? If yes? What is the best way to implement it if other
> operations were need, i.e. compute the division of 2 phasors.
>
> Thanks.
>
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