How to update a variable along with simulation time in modelica?

Question

'I am not familiar with Modelica language. here is my question: I have two Real type variables K and A, they are used to compute outputs of the model, and at each timestep I want to update K and A to recalculate the output. How can I do this?'

Answer 1

The model from your link https://openmodelica.org/forum/default-topic/2339-modelica-variable-behavior can be rewritten to something like that does that (except I haven't tested with OpenModelica). This indicates that you should always include code - as this was not at all clear from your description.

model TimeVarTest
  Modelica.SIunits.Time timeVar(start = 0);
  Modelica.SIunits.Time timeOut(start = 0);
  Modelica.Blocks.Tables.CombiTable1Ds tableVar(table = [0,0;1,0.5]);
  Integer state(start = 0);
algorithm 
  if state == 0 then
    // Action 
    tableVar.u := time-timeVar;
    // Transition 
  end if;
    when pre(state)==0 and time - timeVar > 1 then
      state := 1;
      timeVar := time;
    end when;

  if state == 1 then
  // Action 
  tableVar.u := 1;
  // Transition 
  end if;
  when pre(state)==1 and time - timeVar > 2 then
    state := 0;
    timeVar := time;
  end when;
equation 
  timeOut = tableVar.y[1];
annotation (
    experiment(StartTime = 0, StopTime = 10, Tolerance = 1e-06, Interval = 0.1));
end TimeVarTest;