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OMPython output equidistant results w/o events

#9452  Permalink Top

OMPython output equidistant results w/o events

Nov-13-19 08:50:51

I'm using OMPython to plot, analyze and fit simulation data against measurements.
A common problem is that many functions expect a time series to be continuously increasing. Having two values for the same time instance as they occur at event can cause problems.
Now I found the simulation flag: -noEventEmit, which should do the job.
Unfortunately I got error messages trying the following:

Code:


mod.setSimulationOptions(["stopTime=3.0","tolerance=1e-04",simflags="-noEventEmit"])

File "<ipython-input-14-8d83ca9df2b1>", line 1

    mod.setSimulationOptions(["stopTime=3.0","tolerance=1e-04",simflags="-noEventEmit"])

                                                                       ^

SyntaxError: invalid syntax

and also this does not work as expected:

Code:

mod.simulate(resultfile="res.mat",simflags="-noEventEmit")

---------------------------------------------------------------------------

TypeError                                 Traceback (most recent call last)

<ipython-input-13-edca1ffb54de> in <module>

      1 #mod.setSimulationOptions(["stopTime=3.0","tolerance=1e-04",simflags="-noEventEmit"])

----> 2 mod.simulate(resultfile="initial.mat",simflags="-noEventEmit")



TypeError: simulate() got an unexpected keyword argument 'simflags'

Seems like I'm not calling the methods in the right way.
I could not find an example in the OMPython doc how to do this properly.

#9453  Permalink Top

Re: OMPython output equidistant results w/o events

Nov-13-19 09:21:27

I had a quick look at the python code and we don't support this yet.

I guess one could add a new constructor for simulate that supports named argument "simflags" and all the other options we have in the OMC simulate command:
https://build.openmodelica.org/Document … ulate.html

I will see if Arun has time to fix this.

#9454  Permalink Top

Re: OMPython output equidistant results w/o events

Nov-13-19 10:38:19

Yes, that would be an important enhancement. It's not very intuitive that the ModelicaSystem.simulate() behaves differently than described in the general API.

As a work around I tried to enable the corresponding flag in the OMEdit settings dialog and save these settings as annotation.
I expected that loading the model throughOMPython would also consider these annotations.
This does not seem to be the case as I getSolutions gives the same results.

Unfortunately this does not make either.

Is this another flaw of the ModelicaSystem?

#9455  Permalink Top

Re: OMPython output equidistant results w/o events

Nov-13-19 10:46:45

__OpenModelica_simulationFlags is only read by OMEdit.

Adeel.

Edited by: adeas - Nov-13-19 10:47:08
#9578  Permalink Top

Re: OMPython output equidistant results w/o events

Dec-18-19 10:57:10

@olivleno, and adrpo,

I have added this feature, This is now available in the Latest OMPython See . Update the latest OMPython and test it.

Example Usage:

Code:


from OMPython import ModelicaSystem

mod=ModelicaSystem("BouncingBall.mo" , "BouncingBall");

mod.simulate(simflags="-noEventEmit")

More runtime simulation flags can be added something like below

Code:


mod.simulate(simflags="-noEventEmit -noRestart -override=e=0.3,g=9.71")

Edited by: arupa54 - Dec-18-19 11:00:33
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