.Modelica_LinearSystems2.ZerosAndPoles.Analysis.invariantZeros

Information

Syntax

zeros = ZerosAndPoles.Analysis.invariantZeros(zp)

Description

Computes the invariant zeros of the corresponding state space representation of a zeros-and-poles transfer function. The output is a complex vector containing the eigenvalues. Note, that the conversion of the transfer function does not result in a minimal state space system. Therefore, also zeros equal to unobservable or uncontrollable eigenvalues will be computed.

Example

  ZerosAndPoles p = Modelica_LinearSystems2.ZerosAndPoles.p();
  Modelica_LinearSystems2.ZerosAndPoles zp=(p+1)/(p^2+p+1);

  Complex zeros[:];

algorithm
  zeros := Modelica_LinearSystems2.ZerosAndPoles.Analysis.invariantZeros(zp);
// zeros = {-1}

Interface

encapsulated function invariantZeros
  import Modelica;
  import Modelica_LinearSystems2;
  import Modelica_LinearSystems2.ZerosAndPoles;
  import Modelica_LinearSystems2.Math.Complex;
  input ZerosAndPoles zp "ZerosAndPoles transfer function of a system";
  output Complex Zeros[:] = ZerosAndPoles.Analysis.zerosAndPoles(zp);
end invariantZeros;

Revisions