How to set tunable struct parameters when simulating from the command line in Rapid Accelerator mode

I would like to use a struct as a tunable parameter when running in Rapid Accelerator mode from the command line, in order to run simulations in batch. Is this possible?

Answer 1

[MathWorks Support Team]

Yes. We will assume 'model' is the name of our model that we wish to run, and that this model has an already-defined struct "x" that contains tunable parameters set by fields "a" and "b", e.g.:

x.a = 2
​x.b = 3

In this case, we  can change the parameters and simulate in Rapid Accelerator mode as follows.

Get the current model and parameter structure:

​rtp = Simulink.BlockDiagram.buildRapidAcceleratorTarget(model) 

Set new values for the parameters:

x.a = 4
x.b = 7

Modify the parameters in our model object:

parameterSet = Simulink.BlockDiagram.modifyTunableParameters(rtp,'x',x)

​Simulate again:

simout = sim(model,'SimulationMode','rapid', 'RapidAcceleratorUpToDateCheck','off', 'RapidAcceleratorParameterSets',parameterSet)

This is similar to the workflow described in the following documentation, although it does not require parallel computing:

https://www.mathworks.com/help/simulink/slref/parallel-simulations-using-parsim-parameter-sweep-in-rapid-accelerator-mode.html

Note that the generated executable resides in the slprj > raccel > model folder, rather than the top-level directory as it does with "RSim."

Read more about this here:

https://blogs.mathworks.com/simulink/2015/03/19/getting-the-most-out-of-rapid-accelerator-mode/