The classes listed below are used to represent models of input/output systems (both linear time-invariant and nonlinear). They are usually created from factory functions such as tf and ss, so the user should normally not need to instantiate these directly.
InputOutputSystem LTI StateSpace TransferFunction FrequencyResponseData NonlinearIOSystem InterconnectedSystem LinearICSystem
The following figure illustrates the relationship between the classes and some of the functions that can be used to convert objects from one class to another:
DescribingFunctionNonlinearity DescribingFunctionResponse flatsys.BasisFamily flatsys.FlatSystem flatsys.LinearFlatSystem flatsys.PolyFamily flatsys.SystemTrajectory optimal.OptimalControlProblem optimal.OptimalControlResult optimal.OptimalEstimationProblem optimal.OptimalEstimationResult
The use of these classes is described in more detail in the flatsys-module module and the optimal-module module