ss2tf (Signal Processing Toolbox)

Signal Processing Toolbox

ss2tf

Convert state-space filter parameters to transfer function form

Syntax

```
[b,a] = ss2tf(A,B,C,D,iu)
```

Description

ss2tf converts a state-space representation of a given system to an equivalent transfer function representation.

[b,a] = ss2tf(A,B,C,D,iu) returns the transfer function

of the system

from the iu-th input. Vector a contains the coefficients of the denominator in descending powers of s. The numerator coefficients are returned in array b with as many rows as there are outputs y. ss2tf also works with systems in discrete time, in which case it returns the z-transform representation.

The ss2tf function is part of the standard MATLAB language.

Algorithm

The ss2tf function uses poly to find the characteristic polynomial det(sI-A) and the equality:

See Also

latc2tf, sos2tf, ss2sos, ss2zp, tf2ss, zp2tf

ss2sos ss2zp