I'm looking at this example here, and am using the additive method to plot my bode plots.
To help me draw more accurate plots, I was wondering whether there is an easy way to find all $0 dB$ points?
Doing this question for example:
$H(s) = -10\frac{s}{(s+1)^2 (\frac{s}{10} + 1)}$
I'd need to find all points where $|H(s)| = 1$
so I compute $|H(s)| = |10| \frac{w^2}{(w^2 + 1)\sqrt{0.01w^2+1}} = 1$ which is not easy to solve at all.
How do I go about doing this?
You should look at it as f1=s f2 =1/(s+1)^2 f3=1/(0.1s+1) then tou graph each by itself and because it is linear you just attach the lines. You will be able to see where is the zero
hope this helps. Nachum