how to automatically configure the sim parameter

when i run the following command in command window, matlab version 2019a

sim('untitled','StartTime','0.0','StopTime','20.0','SolverType','Fixed-step','FixedStep','0.5');

the result shows the model simulation parater not changed, any one knows what's the reason, and how to solve it.

Answer 1

[Nitya Patel]

You can use the set_param function to set these parameters before running the sim function. Something like below:

set_param('model_name', 'SolverType','Fixed-step');

sim('model_name');

You can set all the parameters individually and run sim at the end.

Documentation:

• set_param
• Configure Parameters

[wenchao zhang]

thank you, yes, after add the sim('model_name'), the model will run with the new confiuared parameter, but the parameter will turn back to default value when simulation stop, but any way it is ok.

[Nitya Patel]

You can use the save_system function to save the model after making changes.

[wenchao zhang]

ok