How does one factor a SISO transfer function?

I'd like a function that factors SISO transfer functions to a series of second and first order transfer functions. Is there a Matlab function that accomplishes that?

Answer 1

[Rishav]

Hi James,

There is no such MATLAB function that factors SISO transfer functions to a series of second and first order transfer functions.

But you can try some customizations at your end with 'tf' and 'zpk' functions.

Refer to the following documentations for the same:

1. tf - https://www.mathworks.com/help/control/ref/tf.html
2. zpk - https://www.mathworks.com/help/control/ref/zpk.html#d126e278996

Answer 2

[Tushar Mathur]

Hi James,

You can use the modalsep function to separate you system into a series of modal components. For example:

sys = rss(15);
[h,h0] = modalsep(sys);
size(h)

14x1 array of state-space models.
Each model has 1 outputs, 1 inputs, and between 1 and 2 states.