ControlVariable: Boolean;
The ControlVariable property determines whether this variable is a controlling one.
Add a link to the Cp system assembly.
Sub UserProc;
Var
FPAS: LinearDecomposition;
VarS: ILoVariables;
Vrbl: ILoVariable;
EqS: ILoEquations;
Eq: ILoEquation;
AddendS: ILoAddends;
Addend: ILoAddend;
Res: ILinDecompResults;
Retro, Forestall: Array[2] Of double;
Trajectory: Array[5] Of double;
I: integer;
TimeInterval: Integer;
S: string;
Begin
FPAS := New LinearDecomposition.Create;
// Variables
Retro := New Double[2];
Retro[0] := 1;
Retro[1] := 2;
Forestall := New Double[2];
Forestall[0] := 3;
Forestall[1] := 4;
Trajectory := New Double[5];
For i := 0 To 4 Do
Trajectory[i] := 2 + i;
End For;
// List of variables
Vars:= FPAS.Variables;
For I := 1 To 2 Do
s := "x" + i.ToString;
// Variable with retrospective
Vrbl:=Vars.Add(s);
Vrbl.Retrospective := Retro;
Vrbl.Forestall := Forestall;
End For;
// Controlling variable
Vrbl := Vars.Add("U2");
Vrbl.Name := "Control Variable";
Vrbl.Retrospective := Retro;
Vrbl.Forestall := Forestall;
Vrbl.Trajectory := Trajectory;
Vrbl.ControlVariable := True;
// List of equations
EqS := FPAS.Equations;
// Equation 1
Eq := EqS.Add;
// List of summands
AddendS := Eq.Addends;
Addend := Addends.Add(Vars.FindById("x1")); //left part of equation
Addend.Coeff := 1;//variable coefficients
Addend.Lag := 0;//lag
Addend := Addends.Add(Vars.FindById("x1")); //first summand
Addend.Coeff := 2;//variable coefficients
Addend.Lag := 1;//lag
Addend := Addends.Add(Vars.FindById("x1"));//second summand
Addend.Coeff := 0.25 ;//variable coefficients
Addend.Lag := -1;//lag
Addend := Addends.Add(Vars.FindById("U2")); //controlling variable
Addend.Coeff := 1; //variable coefficient
Addend.Lag := 1; //lag
// Equation 2
Eq := EqS.Add;
// List of summands
AddendS := Eq.Addends;
Addend := Addends.Add(Vars.FindById("x2")); //left part of equation
Addend.Coeff := 1;//variable coefficients
Addend.Lag := 0;//lag
Addend := Addends.Add(Vars.FindById("x1")); //first summand
Addend.Coeff := 12.6;//variable coefficients
Addend.Lag := -1;//lag
Addend := Addends.Add(Vars.FindById("x2"));//second summand
Addend.Coeff := 26;//variable coefficients
Addend.Lag := 1; //lag
FPAS.Extremum:=ExtremumType.Maximum;
TimeInterval := 5;
Res := FPAS.Evaluate(TimeInterval) As ILinDecompResults;
Debug.WriteLine(Res.ErrorMsg);
End Sub UserProc;
After executing the example the linear system is calculated, the message with the errors found is displayed in the console window.
See also: