We are trying to use the velocity output of the AD2S1210 to close a loop on speed and then the position to close the loop on position.
For that, we intend to use the velocity output of the chip, but the bandwidth seems lower than the bandwidth of the position. Is that right?
In the figure, I plot the speed directly get from the chip, and the speed obtained indirectly from the encoder( in blue). To obtain the latter, a Butterworth filter 2nd order 50 Hz cutoff has been applied, and still appears to be slightly faster than the chip output.