stepUntilΒΆ

Runs the simulation of an instantiated SSP model or a fmu until a specified time point or in a simulation loop.

Notes:

  • Must be called after initialize().

  • Simulation uses start values from SSV files and any parameters overridden via setValue.

  • Logged results are saved in the format defined by setResultFile() (commonly .mat).

  • Simulation is performed on the active variant of the SSP model.

Syntax:

stepUntil(stopTime: float)

Example usage:

from OMSimulator import FMU, Variable, SignalType, Causality

fmu = FMU('../resources/Modelica.Blocks.Sources.Sine.fmu', instanceName='Sine')

fmu.instantiate()
fmu.setResultFile('Sine_res.mat')

fmu.initialize()

current_time = 0.0
stop_time = 1.0
step_size = 0.1
while current_time < stop_time:
  # advance simulation to the next time
  current_time = round(current_time + step_size, 10) # avoid floating point arithmetic issues
  fmu.stepUntil(current_time)
  print(f"info:    time: {current_time}, y: {fmu.getValue('y')}", flush=True)

fmu.terminate()
fmu.delete()