Bode Plot - trasnfer function

I have the following transfer funciton : G(s) = ((1+s*10^(-3))/((s*10^(-2)*(1+s*10^(-1))*(1+s*10^(-5)))

I need to do the bode plot of magnitude and phase for this function.

So far, i've done the transformation s=jω :

G(jω) = ((1+jω*10^(-3))/((jω*10^(-2))*(1+jω*10^(-1))*(1+jω*10^(-5)))

I identified that it has :

• one zero in ω0=1*10^(3).
• pole in ω1= 0
• pole in ω2= 1*10^(1)
• pole in ω3 = 1*10^(5)

How do I do a bode plot of magnitude and phase for this function ?

Answer 1

[Star Strider]

Try this (your code slightly edited):

s = tf('s');
G = ((1+s*1E-3))/((s*1E-2)*(1+s*1E-1)*(1+s*1E-5));

bode(G)                                                 % Plot Only
[mag,phase,wout] = bode(G);                             % Information Only

See the documentation for the bode fucntion for details.

[Grigorie Vlad]

Thank you very much !

[Star Strider]

As always, my pleasure!