assign parameter values with sim command

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Ben 2013-7-19

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https://ww2.mathworks.cn/matlabcentral/answers/82613-assign-parameter-values-with-sim-command

Suppose I have a Simulink model called myModel.mdl. One of the blocks has a parameter, and I have assigned to it the variable:

sfreq

If I want to set this variable to 0.5 and run the model, then the following code suffices:

sfreq=0.5;
sim('myModel')

However for reasons too complicated to explain here, I would like to make the first command part of the second. If sfreq were a MODEL parameter then I would simply do the following:

sim('myModel','sfreq','0.5')

Unfortunately sfreq is a block parameter, and so I get back the following error:

block_diagram does not have a parameter named 'sfreq'

Any ideas for avoiding this error?

Thanks!

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Answer 1

Azzi Abdelmalek 2013-7-19

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https://ww2.mathworks.cn/matlabcentral/answers/82613-assign-parameter-values-with-sim-command#answer_92285

编辑：Azzi Abdelmalek 2013-7-19

Use set_param function

Example

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Ben 2013-7-19

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Azzi,

Thank you for the suggestion. That command is exactly what I tried first. Unfortunately I won't always have access to the parameter name, which is apparently required for set_param. I can automatically find the BLOCKS in which the parameter appears by using the following command:

blocks=find_system('blockDialogParams','sfreq')

But I cannot actually find the NAMES of the parameters in the blocks which are set to the variable sfreq.