Hello Allen,
I see you want to speed up your simulation by changing how you export data. Both signal logging and outports can be used to extract data from your model.
With signal logging:
- Decimation allows you to log every Nth data point. This reduces the amount of data you save, which helps with memory usage, but It does not make the simulation run any faster—all signals are still calculated at every time step.
- Sample time works differently. If you set a slower sample time for a logged signal (and that signal isn’t needed elsewhere at a higher rate), Simulink can compute and log it less frequently. This can help reduce both the exported data and the simulation time.
For outports, the only option to reduce exported data is decimation (logging every Nth point). Like with signal logging, this only reduces the amount of data you store, not the simulation speed.
So, adjusting the sample time for signal logging can be used to optimize the simulation time.
You may refer to following documentation to learn more about decimation and sample time for signal logging:
- https://www.mathworks.com/help/simulink/gui/signallogging.html
- https://www.mathworks.com/help/simulink/gui/decimation.html
- https://www.mathworks.com/help/simulink/ug/how-to-specify-the-sample-time.html
Hope this helps!
