Example 102: Drawing a Bode plot with complex poles - STEP BY STEP

[@amandasterling7948]

This has been super helpful as a lot of examples seem to cover real poles/zeros in excessive depth and then skip over the complex poles. Thank you so much!

[@thuongmai9201]

Why does the spike up at the cut off frequency G(s)=-20log(2zeta). Is it applicable to all cases with complex roots?

[@ahmadal-areeqy9881]

What a great teaching !! Thank u 🙏

[@blackmamba6646]

Thank you for this.

[@iremcantas6602]

sir, I wonder that if we have 10 in the denominator instead of 1 , it would be affect our bode plot ?

[@biomechlab]

You must always write the characterisic equation in the standard form, which must with +1. If the charactersitic equations was s^2+0.4s+10, both the damping ratio and the natural frequency would change.

[@iremcantas6602]

@@biomechlab Can I get 10 as 1/10 numerator? would I have progressed in the right way then? sir, thank you so much for reply

[@biomechlab]

@@iremcantas6602 yes, factor out 10 in the denominator first, as I did with "4" in this example

[@iremcantas6602]

@@biomechlab I want to ask one more question with your permission.