Hello,

No answers... Maybe my question is not clear enough. I will rephrase it.

In the OME, I would like to see a list of the iteration variables chosen by OpenModelica, along with their start values.
Refering to a commercial tool (Let us call it D.), it is obtained with the command line Advanced.LogStartValuesForIterationVariables:=true;

Is there a way to get this list in OME?

I have tried several commands in the options/simulation/OMC script :
+d=initialization
-iit=value (not accepted)

I searched such a list in the log, in the transform file... nothing.

Thanks anyway to have looked at the message,
b

Hello,

I am trying to test a simple static model with OME 192, and I have the following error message during simulation:

assert | info | <p>simulation terminated by an assertion at initialization</p>

I would like to see the start values of the iteration variables choosen by OpenModelica but I cannot find out how to do that...

Does someone knows how to do it?

Thanks in advance for your answers,
b

Hello,

Thanks a lot for this answer.
Indeed the bug looks like the one treated nb 3095. The bug is classified as blocker, and to my opinion it is the case since it is a classical use for calibration of models.

Concerning the saving issue, I ask to save the model in an independant file, but OMEdit does not save at all. I'll follow your advice and create a ticket.

b

Hello,

Is this forum still in operation?
Does anyone reads it?

b

Hello,

I am testing the Open Modelica Editor to see if I could swith to it for most of my usual simulation.
First I have tried a very simple steady state simulation using ThermoSysPro package and connecting :
- a source of steam,
- a steam turbine,
- a sink

This first simulation worked fine, here is the code of the model :

model TAV
  ThermoSysPro.WaterSteam.Machines.StodolaTurbine stodolaturbine1 annotation(Placement(visible = true, transformation(origin = {0, 0}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
  ThermoSysPro.WaterSteam.BoundaryConditions.Sink sink1 annotation(Placement(visible = true, transformation(origin = {60, 0}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
  ThermoSysPro.WaterSteam.BoundaryConditions.SourcePQ sourcepq1(P0 = 10000000.0, h0 = 3000000.0, Q0 = 110) annotation(Placement(visible = true, transformation(origin = {-60, 0}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
equation
  connect(stodolaturbine1.Cs, sink1.C) annotation(Line(points = {{10.1, 0}, {50.6066, 0}, {50.6066, -1.03986}, {50.6066, -1.03986}}));
  connect(sourcepq1.C, stodolaturbine1.Ce) annotation(Line(points = {{-50, 0}, {-10.052, 0}, {-10.052, -1.03986}, {-10.052, -1.03986}}));
  annotation(Icon(coordinateSystem(extent = {{-100, -100}, {100, 100}}, preserveAspectRatio = true, initialScale = 0.1, grid = {2, 2})), Diagram(coordinateSystem(extent = {{-100, -100}, {100, 100}}, preserveAspectRatio = true, initialScale = 0.1, grid = {2, 2})));
end TAV;

Then I tried to inverse the problem, fixing the output pressure et letting free the intern coefficient called Cst (that is a very trivial calculation usually done for model calibration).

First I found that I could not add attributes in the block windows, and that it was safer to do it in the modelica code. Here is what I added in the code :

stodolaturbine1(Cst(fixed = false), Ps(fixed = true, start = 4.7e6))

The simulation works but it does not take into account my attribute for "fixed" : Ps is still free and Cst is still fixed to its default value.
If someone can help to solve this difficulty, I would be quite happy.

I would prefer to solve out this simple case before going further with big steady stat or dynamic simulations with OME.

Using OME I also had some problems to save new models in a package. For instance if I do :
- right click on a model
- copy
- type name "newmodel"
- choose the package in which I want to keep it
- modify newmodel
- save it

Then the file newmodel.mo never appears in my package directory, so I cannot figure out how to save it effectively from OME...
I am eager to getting your advices.

Thanks
B