StateSpaceModel[{a, b, c, d}] represents the state-space model with state matrix a, input matrix b, output matrix c, and transmission matrix d. StateSpaceModel[tf] gives a ...
SystemsModelOrder[ss] gives the order of the StateSpaceModel object ss.
ContinuousTimeModelQ[expr] gives True if expr is a continuous-time StateSpaceModel or TransferFunctionModel object, and False otherwise.
DiscreteTimeModelQ[expr] gives True if expr is a discrete-time StateSpaceModel or TransferFunctionModel object and False otherwise.
ObservabilityMatrix[ss] gives the observability matrix of the StateSpaceModel object ss.
ControllableModelQ[ss] yields True if the StateSpaceModel object ss is controllable, and False otherwise.
ControllabilityGramian[ss] gives the controllability Gramian of the StateSpaceModel object ss.
ControllabilityMatrix[ss] gives the controllability matrix of the StateSpaceModel object ss.
DualSystemsModel[ss] gives the dual of the StateSpaceModel object ss.
OutputControllabilityMatrix[ss] gives the output controllability matrix of the StateSpaceModel object ss.