How to compile a simscape model (to dll) with tunable parameters?

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Bruno Paduano 2021-7-22

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https://ww2.mathworks.cn/matlabcentral/answers/883594-how-to-compile-a-simscape-model-to-dll-with-tunable-parameters

回答： Yifeng Tang 2021-7-23

Hello everyone,

I have a problem in simscape compiling. I need to "tune" some parameters from an external source (I already do this with a compiled simulink model) hence, with simscape I have to set them as "run-time parameters".

In this way setting the target to ert ( create visual studio solution) I am able to compile an exe file which gives me the same output of the simscape model.

Anyway my final goal is to create a DLL file that can be imported into an external software (OrcaFlex). But when I compile the project (adding a wrapper), OrcaFlex gives me the error "floating point division by zero".

If I compile the model without run-time parameters it works.

Anyone can help me?

Thanks in advance,

Bruno

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Answer 1

Yifeng Tang 2021-7-23

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https://ww2.mathworks.cn/matlabcentral/answers/883594-how-to-compile-a-simscape-model-to-dll-with-tunable-parameters#answer_752709

Hi Bruno,

Try this: make the parameter you want to tune in the generated code a "Simulink variable", i.e. a variable in the Simulink model's workspace, not the MATLAB workspace. Then keep it run-time parameter. I believe this way it will appear as an input in the generated code/functions.

Here are some Doc page talking about workspace and tunability in the generated code:

https://www.mathworks.com/help/simulink/ug/using-model-workspaces.html

https://www.mathworks.com/help/simulink/ug/using-tunable-parameters.html#bu1rgli