When using the Parameter Estimator, an error occurs when trying to use both the accelerator mode and fast restart simultaneously

I am trying to find the optimal parameters for my simulation using Simulink's Parameter Estimator.

However, when I set the 'SimulationMode' to 'Accelerator' and enable 'Fast Restart' at the same time, the Estimation Progress Report displays the following error message.

As you can see, "Cannot change the 'SimulationMode' parameter when the model 'examplemodel' is initialized in Fast Restart" is shown.

Also, I can select 'error to view' from 1 to 8, and for each error to view, all error messages are the same with only slight differences in the parameter values.

However, when I change the 'SimulationMode' to 'normal' or turn off Fast Restart, the parameter estimator works correctly.

But I want to use the 'accelerator' mode and Fast Restart simultaneously to increase the estimation speed.

When running the engine throttle model example(command open_system('spe_engine_throttle')), it seems that there are no issues with using both the 'accelerator' mode and Fast Restart simultaneously. This suggests that the Parameter Estimator does not restrict the use of these two features together.

Is there any speculation on the reasons for this error message occurring?

[Jeong Kuk Hong]

It seems that specifying the Initial condition when configuring the experiment in the Parameter Estimator was the cause. After removing the Initial condition, it works fine.

Answer 1

[Devesh Bhasin]

Hi Jeong,

Thanks for reporting the issue. As of R2023a, the only workaround seems to be either (1) not using Accelerator mode, or (2) not setting the inital states in the experiment.

That said, we have taken note of this issue and will investigate it further on our end.

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