How can I use quadprog in Simulink?

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Saleh Msaddi 2020-3-23

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https://ww2.mathworks.cn/matlabcentral/answers/512369-how-can-i-use-quadprog-in-simulink

评论： Saleh Msaddi 2021-3-8

Hello everyone,

I am using quadprog in a MatLab function in Simulink. When I run the simulation, I get the following error "Function 'quadprog' not supported for code generation". My purpose is running a simulation and interpreting the results, I don't want to generate any code from the model.

Any suggestions on how I can solve this issue?

Thanks in advance.

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Answer 1

Saleh Msaddi 2020-3-23

3
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https://ww2.mathworks.cn/matlabcentral/answers/512369-how-can-i-use-quadprog-in-simulink#answer_421480

编辑：Saleh Msaddi 2020-3-23

在 MATLAB Online 中打开

It appeared that most of the Optimization Toolbox functions supported with Embedded MATLAB, and quadprog is one of these upsupported functions. Since I am not interested in code generation, I figured out that I can use the following command in my function block, and it works perfectly!

coder.extrinsic('quadprog');

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Syed Ahmad Nadeem 2020-6-21

Thank you for the information Saleh. I tried using the code you mentioned above to work with the quadprog function in matlab embedded function. On using it I a receive another set of errors as:

'inner matrix dimensions must agree'

Simulink cannot determine sizes and/or types of the outputs for block 'linear_model_check/MPC controller' due to errors in the block body, or limitations of the underlying analysis. The errors might be inaccurate. Fix the indicated errors, or explicitly specify sizes and/or types for all block outputs.

I tried exploring these errors further and it seems these generate from the command statement where I try to assign the outputs of 'quadprog' function to some variable name. If you could point in some direction, it would be really helpful. I am using Matllab 2018a, and trying to avoid the upgradation to 2020a.

Saleh Msaddi 2020-6-21