functiontoDiscreteZerosAndPoles

Information

Syntax

dzp = DiscreteTransferFunction.Conversion.toDiscreteZerosAndPoles(tf)

Description

Computes a DiscreteZerosAndPoles record

          product(z + n1[i]) * product(z^2 + n2[i,1]*z + n2[i,2])
zp = k * ---------------------------------------------------------
          product(z + d1[i]) * product(z^2 + d2[i,1]*z + d2[i,2])

of a discrete transfer function represented by numerator and denominator polynomial. The poles and zeros and the gain k are computed by (zerosAndPoles) and are used as inputs the DiscreteZerosAndPoles constructor.

Example

  DiscreteTransferFunction z = Modelica_LinearSystems2.DiscreteTransferFunction.z();
  Modelica_LinearSystems2.TransferFunction tf = 1/(z^2 + 3*z +2)

algorithm
  dzp:=Modelica_LinearSystems2.TransferFunction.Conversion.toZerosAndPoles(dtf);
//  zp = 1/( (z + 1)*(z + 2) )

Inputs

Outputs