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Extract FMU parameters through python
Extract FMU parameters through python
Jun-18-21 07:52:42
Let's say that I have exported a battery as an FMU and I want to use it for co-simulation in python. Is there a way to get parameter values, such as the capacity of the battery in [Wh] or the minimum SOC of the battery, instead of manually observing them from the XML file?
Thank you
Re: Extract FMU parameters through python
Jun-21-21 13:31:37
You can call the functions for getting and setting variable values, see FMI Standard 2.0.2 section 2.1.7 Getting and Setting Variable Values. I guess most FMI simulation tools will have a similar function to use the fmi2GetXXX functions.
If you are using OMSimulator with the Python interface you can do something similar to this example:
Code:
from OMSimulator import OMSimulator
oms = OMSimulator()
oms.setTempDirectory("./temp/")
oms.newModel("model")
oms.addSystem("model.root", oms.system_sc)
# instantiate FMUs
oms.addSubModel("model.root.system1", "FMUs/System1.fmu")
oms.addSubModel("model.root.system2", "FMUs/System2.fmu")
# add connections
oms.addConnection("model.root.system1.y", "model.root.system2.u")
oms.addConnection("model.root.system2.y", "model.root.system1.u")
# simulation settings
oms.setResultFile("model", "results.mat")
oms.setStopTime("model", 0.1)
oms.setFixedStepSize("model.root", 1e-4)
oms.instantiate("model")
value, status = oms.getReal("model.root.system1.x_start")
oms.initialize("model")
oms.simulate("model")
oms.terminate("model")
oms.delete("model")
Compare with the documentation of OMSimulatorPython.
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