Control system classes

The classes listed below are used to represent models of linear time-invariant (LTI) systems. They are usually created from factory functions such as tf() and ss(), so the user should normally not need to instantiate these directly.

TransferFunction(num, den[, dt])

A class for representing transfer functions.

StateSpace(A, B, C, D[, dt])

A class for representing state-space models.

FrequencyResponseData(d, w[, smooth])

A class for models defined by frequency response data (FRD).

Input/output system subclasses

Input/output systems are accessed primarily via a set of subclasses that allow for linear, nonlinear, and interconnected elements:

InputOutputSystem

A class for representing input/output systems.

InterconnectedSystem

Interconnection of a set of input/output systems.

LinearICSystem

Interconnection of a set of linear input/output systems.

LinearIOSystem

Input/output representation of a linear (state space) system.

NonlinearIOSystem

Nonlinear I/O system.

Additional classes

DescribingFunctionNonlinearity

Base class for nonlinear systems with a describing function.

flatsys.BasisFamily

Base class for implementing basis functions for flat systems.

flatsys.FlatSystem

Base class for representing a differentially flat system.

flatsys.LinearFlatSystem

Base class for a linear, differentially flat system.

flatsys.PolyFamily

Polynomial basis functions.

flatsys.SystemTrajectory

Class representing a system trajectory.

optimal.OptimalControlProblem

Description of a finite horizon, optimal control problem.

optimal.OptimalControlResult

Result from solving an optimal control problem.