ss2tf (Signal Processing Toolbox)

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
Lattice filter to transfer function conversion.

sos2tf
Convert digital filter second-order section parameters to transfer function form.

ss2sos
Convert digital filter state-space parameters to second-order sections form.

ss2zp
Convert state-space filter parameters to zero-pole-gain form.

tf2ss
Convert transfer function filter parameters to state-space form.

zp2tf
Convert zero-pole-gain filter parameters to transfer function form.

`latc2tf`	Lattice filter to transfer function conversion.
`sos2tf`	Convert digital filter second-order section parameters to transfer function form.
`ss2sos`	Convert digital filter state-space parameters to second-order sections form.
`ss2zp`	Convert state-space filter parameters to zero-pole-gain form.
`tf2ss`	Convert transfer function filter parameters to state-space form.
`zp2tf`	Convert zero-pole-gain filter parameters to transfer function form.

ss2sos ss2zp