Parallel connection of two discrete transfer functions (= inputs are the same, outputs of the two systems are added)
function 'dtf+dtf' import Modelica; import Modelica_LinearSystems2.Math.Polynomial; import Modelica_LinearSystems2.DiscreteTransferFunction; input DiscreteTransferFunction dtf1 "Transfer function system 1"; input DiscreteTransferFunction dtf2 "Transfer function system 2"; output DiscreteTransferFunction result; end 'dtf+dtf';