This is the filter gain/frequency response graph (Bode plot). The output remains substantially equal to the input (vo/vi≈1≈0dB)(vo/vi≈1≈0dB) for all frequencies up to the cut-off frequency (fc). This is the upper limit of the passband for the filter, and all frequencies...
bp2 = bodeplot(Parray*K2,{1e-2,1e2}); bp2.PhaseMatchingEnabled = 'on'; grid on Randomized closed-loop Bode plots confirm a closed-loop bandwidth of approximately 2 rad/s. The frequency response has a bit more peaking than was seen in the lower bandwidth design, due to the increas...