Bode Plot 3 - Part 1

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2nd order syst bode plots Lf & HF assyp, their intersection point, slope of HF assyp note : 18:00 1. different freq def natural freq wn is freq at which 2nd order undamped syst oscillates. With sinusoidal ip of freq wn, the op blows to inf damped natural freq wd = wn root ( 1 - zeta ^2 ) is freq at which stable 2nd order damped syst oscillates for 0 < zeta < 1 resonant freq wr = wn root ( 1 - 2 zeta ^2 ) is freq at which stable 2nd order syst oscillates for 0 < zeta < 1/root(2) 2. resonant syst is stable with bounded op yet resonnce may cause structural damage & hence is undesirable.