.Modelica_LinearSystems2.ZerosAndPoles.Analysis.zerosAndPoles

Information

Syntax

(z,p,k) = ZerosAndPoles.Analysis.zerosAndPoles(zp)

Description

This function calculates the zeros, poles and gain of a ZerosAndPoels transfer function.

Example

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

public
  output Complex z;
  output Complex p;
  output Real k;

algorithm
  (z,p,k)=Modelica_LinearSystems2.ZerosAndPoles.Analysis.zerosAndPoles(zp);
//  z = {-1}
//  p = {-0.5 + 0.866025*j, -0.5 - 0.866025*j}
//  k = 1

Interface

encapsulated function zerosAndPoles
  import Modelica;
  import Modelica.ComplexMath.j;
  import Modelica_LinearSystems2;
  import Modelica_LinearSystems2.ZerosAndPoles;
  import Complex;
  input ZerosAndPoles zp "ZerosAndPoles transfer function of a system";
  output Complex z[:] = fill(Complex(0, 0), size(zp.n1, 1) + 2*size(zp.n2, 1)) "Zeros (Complex vector of numerator zeros)";
  output Complex p[:] = fill(Complex(0, 0), size(zp.d1, 1) + 2*size(zp.d2, 1)) "Poles (Complex vector of denominator zeros)";
  output Real k "Constant multiplied with transfer function";
end zerosAndPoles;