how to get simulink model outputs simultaneously(when the simulation is running)?

Question

Selim 2015-4-1

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https://ww2.mathworks.cn/matlabcentral/answers/195566-how-to-get-simulink-model-outputs-simultaneously-when-the-simulation-is-running

评论： liqun fang 2022-11-7

I have a simulink model that have the outputs x and y. When i run the simulation they give me 500x1 double values. x values are reference values and y values are the outputs that i want to converge them to x. I used genetic algoirthm to optimize output y. There are 5 parameters to optimize outputs y. I want to get x and y values to calculate error(MSE, MAPE , ITAE vs.) for cost function of genetic algorithm. Is there any method to get these output values from simulink to .m file(genetic algorithm runninng in this file) when simulation is running . From .m file to simulink i can adjust the 5 parameters simultaneously by 'set_params' but i can not find for the exact opposite situation.

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Answer 1

Selim 2015-4-1

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https://ww2.mathworks.cn/matlabcentral/answers/195566-how-to-get-simulink-model-outputs-simultaneously-when-the-simulation-is-running#answer_173557

在 MATLAB Online 中打开

I solved the problem. I used to matfile from the sinks library and created the subsystem for this block. Then i masked the subsystem as parameter -- Inherit: Same as output Parameter name must be the same with output name . In my genetic algorithm .m file i used

y = get_param('my_model/y','y') %y is also subsystem name

it works. After running the simulation i get the y values each iteration to send ga .m file for optimization.

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liqun fang 2022-11-7

Hi Selim, Can you explain the operation in detail? I have the same needs. Thank you..

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Answer 2

Dishant Arora 2015-4-1

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https://ww2.mathworks.cn/matlabcentral/answers/195566-how-to-get-simulink-model-outputs-simultaneously-when-the-simulation-is-running#answer_173549

You can bring or save simulation results to your workspace by making use of following blocks.

1.) to workspace form the sinks library

2.) to matffile from the sinks library

You can also make use out1(outport) block

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Ilham Hardy 2015-4-1

It doesn't meet the requirement : when simulation is running

Selim 2015-4-1

i tried to use to workspace block, but when i run the simulation i get 'undefined function or variable y' error. i will try to matfile, if it works i'll write about it. Many thanks.

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