Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://python-control.readthedocs.io/en/stable/generated/control.tf2ss.html below:

Website Navigation

• Python Control Systems Library

control.tf2ss — Python Control Systems Library 0.10.2 documentation

control.tf2ss(sys)[source]

Transform a transfer function to a state space system.

The function accepts either 1 or 2 parameters:

tf2ss(sys)

Convert a transfer function into space space form. Equivalent to ss(sys).

tf2ss(num, den)

Create a state space system from its numerator and denominator polynomial coefficients.

For details see: tf.

Parameters:

sysStateSpace or TransferFunction

A linear system.

numarray_like, or list of list of array_like

Polynomial coefficients of the numerator.

denarray_like, or list of list of array_like

Polynomial coefficients of the denominator.

Returns:

outStateSpace

New linear system in state space form.

Other Parameters:

inputs, outputsstr, or list of str, optional

List of strings that name the individual signals of the transformed system. If not given, the inputs and outputs are the same as the original system.

namestring, optional

System name. If unspecified, a generic name ‘sys[id]’ is generated with a unique integer id.

methodstr, optional

Set the method used for computing the result. Current methods are ‘slycot’ and ‘scipy’. If set to None (default), try ‘slycot’ first and then ‘scipy’ (SISO only).

Raises:

ValueError

If num and den have invalid or unequal dimensions, or if an invalid number of arguments is passed in.

TypeError

If num or den are of incorrect type, or if sys is not a TransferFunction object.

Notes

The slycot routine used to convert a transfer function into state space form appears to have a bug and in some (rare) instances may not return a system with the same poles as the input transfer function. For SISO systems, setting method = ‘scipy’ can be used as an alternative.

Examples

>>> num = [[[1., 2.], [3., 4.]], [[5., 6.], [7., 8.]]]
>>> den = [[[9., 8., 7.], [6., 5., 4.]], [[3., 2., 1.], [-1., -2., -3.]]]
>>> sys1 = ct.tf2ss(num, den)

>>> sys_tf = ct.tf(num, den)
>>> sys2 = ct.tf2ss(sys_tf)

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4