ss2tf

Signal Processing Toolbox

State-space to transfer function conversion.

[num,den] = ss2tf(a,b,c,d,iu)

Description

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

[num,den] = ss2tf(a,b,c,d,iu)

returns the transfer function

of the system

from the iu-th input. Vector den contains the coefficients of the denominator in descending powers of s. The numerator coefficients are returned in array num with as many rows as there are outputs y. The function tf2ss is the inverse of ss2tf. ss2tf also works with systems in discrete time, in which case it returns the z-transform representation.

Algorithm

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

See Also


`ss2zp`	State-space to zero-pole-gain conversion.
`tf2ss`	Transfer function to state-space conversion.
`tf2zp`	Transfer function to zero-pole-gain conversion.
`zp2ss`	Zero-pole-gain to state-space conversion.
`zp2tf`	Zero-pole-gain to transfer function conversion.

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