Hi. I would like to ask you in the tranfer function that the numerator can be larger than the denominator ? Because I see in simulink i can not create a tranfer function like that

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super bad
super bad 2017-10-12
编辑： Walter Roberson 2017-12-27
I would like to ask you in the tranfer function that the numerator can be larger than the denominator ?
Because I see in simulink i can not create a tranfer function like that

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回答（2 个）

Nicolas Schmit
Nicolas Schmit 2017-10-13
In MATLAB you can create arbitrary transfer functions, with a numerator degree greater than the denominator degree. This is forbidden in Simulink because such functions do not represent physical systems.
Thanh Nguyen
Thanh Nguyen 2017-12-27
编辑：Walter Roberson 2017-12-27
G(s) = N(s)/B(s) = a(s)+b(s)/c(s)
a(s) is a polynome, you can use derivative to create
order of b(s) is smaller than that of c(s) and you can create b(s)/c(s) by transfer function block
Finally you add two components
ex: s^2/(s+1)=s-1+1/(s+1)

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