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Paul C
Posts:
5
Registered:
2/27/07


Why does Bode Plot frequency axis change with sampling time?
Posted:
Apr 19, 2014 7:23 PM


Why does the Bode Plot frequency axis change if the sampling time 'dt' is changed? If dt is changed from 1e3 to 1e4, the axis labels go from 10^1 > 10^4, to 10^2 > 10^5. But sampling time shouldn't change the axis, just the accuracy. dt = 1e4; t = (0 : dt : 50)'; uc = chirp(t, 0.1, t(end), 100); yc = circshift(uc, 100); %phase shift the output data = iddata(yc, uc, dt); TF= etfe( data ); bode(TF);



