dominant pole + trasfert function

[So.nia]

hi all,

i need to find the dominant pole of trasfer function which is as follows:

tf = [as²+bs+c] / [ As3 + Bs² +Cs + D]

can i suppose the dominant pole is equal to D/C ?? if i can what is the expelication !

Regards;

 

[victoriya]

it depends on relation between your parameters(A,B,..) would you please give more details. your tf has three poles and which one has the minimum value will be your domonant pole.

 

[FvM]

As an example consider three real poles (As+1)(Bs+1)(Cs+1), A being the dominant pole A >> B> C

Then calculate yourself.