Hello,
I'm trying to make a 3d look-up table component, by using several CombiTable2d tables whose output will populate an array of ordinates that can be used by the Modelica.Math.Vectors.interpolate function, to give a single Real output.

The CombiTable2d table's data will not be read from file but instead hardwired from values in declared arrays.

I'm using the following sources as guidance:

http://book.xogeny.com/components/subsy … s/#index-0
https://www.modelica.org/events/modelic … sion5a.pdf
Peter Fritzson book (2nd Ed.)

The code below is as far as I've got, but when run in OM the "y" output from each of the two CombiTable2d tables is the same (both 2.63) whereas one should be 1.36. Clicking the "Instantiate Model" button in OMEdit, it confirms that both tables are being feed the same array data.

I haven't used Modelica before so I'm seeking a bit of guidance as to how best to go about this. I have used causal block diagram software before and soon felt the pain and its limitation when is came to model modifications and maintenance. Modelica's equation based components seem like wizardry in comparison.

Thanks for any help,  Bob Flandard

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!!! Start of my sample model code !!!
model testArrays2

Modelica.Blocks.Interfaces.RealInput x1 annotation(Placement(visible = true, transformation(origin = {-100, 60}, extent = {{-20, -20}, {20, 20}}, rotation = 0), iconTransformation(origin = {-94, 58}, extent = {{-20, -20}, {20, 20}}, rotation = 0)));

Modelica.Blocks.Interfaces.RealInput x2 annotation(Placement(visible = true, transformation(origin = {-100, 0}, extent = {{-20, -20}, {20, 20}}, rotation = 0), iconTransformation(origin = {-92, -2}, extent = {{-20, -20}, {20, 20}}, rotation = 0)));

Modelica.Blocks.Interfaces.RealInput x3 annotation(Placement(visible = true, transformation(origin = {-100, -60}, extent = {{-20, -20}, {20, 20}}, rotation = 0), iconTransformation(origin = {-92, -58}, extent = {{-20, -20}, {20, 20}}, rotation = 0)));


parameter Integer nTabs=2;
parameter Real MyTable1[4,4]=[0, 0 , 5, 10;
                            0, 1.36, 10, -10;
                            5, 2, 20, -20;
                            10, 3, 30, -30];
                           
parameter Real MyTable2[4,4]=[0, 0 , 5, 10;
                            0, 2.63, 13, -1;
                            5, 3, 15, -6.5;
                            10, 4, 21, -21.2];
                                                   
encapsulated record LUT
      Real table[4,4];
end LUT;


parameter LUT[nTabs] MyLUTs={LUT(MyTable1),LUT(MyTable2)};

Modelica.Blocks.Tables.CombiTable2D My2DTables[nTabs](table= array(MyLUTs[i].table for i in 1:nTabs));
                                                 
equation
for i in 1:nTabs loop
   My2DTables[i].u1 = abs(x1);
   My2DTables[i].u2 = abs(x2);
end for;
end testArrays2;
!!! End of my sample model code !!!

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!!! Start code snippets from "Instantiate Model" !!!
protected Modelica.Blocks.Types.ExternalCombiTable2D My2DTables[1].tableID = Modelica.Blocks.Types.ExternalCombiTable2D.constructor("NoName", "NoName", {{0.0, 0.0, 5.0, 10.0}, {0.0, 2.63, 13.0, -1.0}, {5.0, 3.0, 15.0, -6.5}, {10.0, 4.0, 21.0, -21.2}}, Modelica.Blocks.Types.Smoothness.LinearSegments) "External table object";
  protected parameter Real My2DTables[1].tableOnFileRead(fixed = false) "= 1, if table was successfully read from file";

  protected Modelica.Blocks.Types.ExternalCombiTable2D My2DTables[2].tableID = Modelica.Blocks.Types.ExternalCombiTable2D.constructor("NoName", "NoName", {{0.0, 0.0, 5.0, 10.0}, {0.0, 2.63, 13.0, -1.0}, {5.0, 3.0, 15.0, -6.5}, {10.0, 4.0, 21.0, -21.2}}, Modelica.Blocks.Types.Smoothness.LinearSegments) "External table object";
  protected parameter Real My2DTables[2].tableOnFileRead(fixed = false) "= 1, if table was successfully read from file";
!!! End code snippets from "Instantiate Model" !!!
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