control.matlab.append

control.matlab.append(sys1, sys2[, ..., sysn])[source]

Group LTI models by appending their inputs and outputs.

Forms an augmented system model, and appends the inputs and outputs together.

Parameters:

sys1, sys2, …, sysnscalar, array, or LTI: I/O systems to combine.

Returns:

outLTI: Combined system, with input/output vectors consisting of all input/output vectors appended. Specific type returned is the type of the first argument.

Other Parameters:

inputs, outputsstr, or list of str, optional: List of strings that name the individual signals. If not given, signal names will be of the form ‘s[i]’ (where ‘s’ is one of ‘u’, or ‘y’). See InputOutputSystem for more information.
statesstr, or list of str, optional: List of names for system states. If not given, state names will be of of the form ‘x[i]’ for interconnections of linear systems or ‘<subsys_name>.<state_name>’ for interconnected nonlinear systems.
namestring, optional: System name (used for specifying signals). If unspecified, a generic name ‘sys[id]’ is generated with a unique integer id.

See also

interconnect, feedback, negate, parallel, series

Examples

>>> G1 = ct.rss(3)
>>> G2 = ct.rss(4)
>>> G = ct.append(G1, G2)
>>> G.ninputs, G.noutputs, G.nstates
(2, 2, 7)

>>> G1 = ct.rss(3, inputs=2, outputs=4)
>>> G2 = ct.rss(4, inputs=1, outputs=4)
>>> G = ct.append(G1, G2)
>>> G.ninputs, G.noutputs, G.nstates
(3, 8, 7)