Modelling language for multi-domain physical and control systems.
The free Modelica language is developed by the non-profit Modelica Association. The Modelica Association also develops the free Modelica Standard Library.
Questions tagged [modelica]
1319 questions
0
votes
2 answers
Reusable Templates
Instead of creating text boxes everytime for the displaying the name of the blocks, I thought of creating a reusable template for the same. Following is what I created
partial block BlockTemplate
annotation(Icon(coordinateSystem(extent =…
MSK
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0
votes
2 answers
Creating Replaceable models
I wanted to know if Modelica allows us to create replaceable models?
I was trying to redeclare the Modelica.Blocks.Sources.Constant to a block which goves constant voltage. I only need to change the unit of the variable k. (from nothing to…
MSK
- 448
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0
votes
0 answers
OpenModelica internal error reinit called with wrong args?
I'm writing a program that from an Functional Mock-Up Unit generates a complete Modelica model. It works just fine when I simulate the model in Dymola but in OpenModelica I get this error:
internal error reinit called with wrong args
I call…
FluxxSimon
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0
votes
1 answer
Is it possible to modify compiler include path for Dymola?
This question is raised due to a situation that I encountered
Say I have these external files and some declarations or definitions in them:
foo1.h
extern void ext_func();
foo1.c
void ext_func(){
....
}
foo2.c
…
Hang Yu
- 476
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- 14
0
votes
1 answer
Why parameters bounds are not respected using dymola optimization library?
I am trying to optimize (minimize) variable "emissions" using the ModelOptimization function in the library optimization for dymola using the following code:
model opt
parameter Real electricity=999;
Real x2(start=0);
Real x1(start=0);
Real…
bmorvaj
- 55
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0
votes
0 answers
Dymola optimisation library constraints
Again me. Sorry for possibly stupid questions but I'm new to this so i Have this initial problems and dilemas.
I would like to optimize carbon emission using dymola optimization library on this theoretical case. There is grid and PV as means of…
bmorvaj
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0
votes
1 answer
What is a theretical way to write i++ in Dymola? And have hybrid continous and discrete model?
I am just started to learn modelica and I have one (newbie) question. The problem for me is to change the way of thinking from convential programming thinking to modelica way of thinking.
I want to do simple program.
I have input array with PV…
bmorvaj
- 55
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- 7
0
votes
1 answer
How to use the real input connector in OpenModelica?
I would like to have a OpenModelica model like the following:
On the left side there is a "Real Input Connector" called u and on the right side there is a "Real Output Connector" called y.
The Porpose of the model is just to take a value (u)…
jonie83
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0
votes
3 answers
Vary frequency of sin voltage source in Modelica
I am working with open Modelica now a days and i wanted to know if there is any way to change the frequency of the sine voltage source e.g the frequency of the source doubles or triples every 3 seconds so that when i draw the graph for a low pass…
danny
- 400
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- 18
0
votes
2 answers
Why same OpenModelica code behaves differently in two files?
I'm trying to model the trajectory of projectile in modelica, but when I model air_pressure dependency on the height I get weird result, now if I simply copy only the air_pressure's code to another file, I get pretty fine output. Why's that so?
This…
Salman Azmat
- 298
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0
votes
1 answer
Modelica : variables of class during instantiation
The variables of Modelica classes are instantiated per object.
Can anyone clarify this statement?
shilu
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0
votes
2 answers
Modelica - mapping non modelica function to model
If i have a non-modelica function which has no input and no output like
void foo(void)
{
variable1;
variable2;
for loop
{
if conditions
}
variable2=foobar(); // another function call, foobar() is not modelica function
}
then can…
shilu
- 135
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- 6
0
votes
3 answers
how to resolve a dimensionality-related error in this code?
I have written a code in Modelica to train a feedforward two-layer neural network for my Master thesis. The code receives a vector of six elements (u[nin]) and provides an output vector of two elements y[nout]. When I translate the code in dymola, I…
0
votes
1 answer
Dymola_InlineAfterIndexReduction
This question is related to an issue that I encountered when I was playing with some blocks. Here's the model that I have,
As you can see, there are two kinds of connections, the inputs of the first connection(from the top to bottom) is…
Hang Yu
- 476
- 2
- 14
0
votes
1 answer
transform Modelica to FMU? How to implement the process through Java
everyone. I want to simulate some modelica model, but not use openmodelica or dymola, so I think if I can transform the model code into fmu, then call jfmi to process.
I read the corresponding material, but still can not find some material very…
xing
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