PyFMI is a package for loading and interacting with Functional Mock-Up Units (FMUs) both for Model Exchange and Co-Simulation, which are compiled dynamic models compliant with the Functional Mock-Up Interface (FMI)
In the above implementation, the extracted results y1-values are consistent with y2-values, but y3-values will be delayed by 1 second compared to y1-values. Is this the mechanism of pyfmi?
YanceyYq
commented
2 months ago
environment win11 python=3.11 pyfmi=2.11.0 (latest from conda-forge) CoSimulation model fmiVersion=2 issue
Create FMU model object
model_sub1 = FMUModelCS2("./Sin.fmu") model_sub2 = FMUModelCS2("./Sin2.fmu")
将Put two FMU model objects into the list
models = [model_sub1, model_sub2]
Define the connection relationship between models
connections = [(model_sub1, "o1", model_sub2, "int_in")]
Create a Master object for joint simulation
master = Master(models, connections)
Get default settings for simulation options
opts = master.simulate_options()
Set simulation step size and total duration
opts["step_size"] = 1.0 total_duration = 5.0 # 5秒
Simulate using the set simulation options and total duration
res = master.simulate(options=opts, final_time=total_duration)
Extract results
y1_values = res[0]['o1'] y3_values = res[1]['int_out'] y2_values = res[1]['int_in'] times = res[0]['time']
In the above implementation, the extracted results y1-values are consistent with y2-values, but y3-values will be delayed by 1 second compared to y1-values. Is this the mechanism of pyfmi?