control simulink from mfile

Hi, I would like to control simulink from m-file. I wrote m-file. I start simulation (from m-file) and then I need after some time to stop simulation and change some input parameters and then continue. Is it possible? I have been looking for information about that but I havent been successful. e.g. I have a model in simulink which contains voltage source and resistance. Simulation runs 10 seconds. I would like to change every second peak amplitude of voltage source. I could use e.g. programmable voltage source but I would like to do it by means of m-file. Thank you in andvance.

Answer 1

[TAB]

To start, stop, pause, and update your model from m-file you can use

set_param('YourModel', 'SimulationCommand', 'cmd');

Where cmd could be

start - To start simulation
stop  - To stop simulation
pause - To puase simulation
continue - To continue from puase
update - To update the model

[Matus]

Thank you for your answer but I have still a problem to solve my mfile.

After I write

set_param('YourModel', 'SimulationCommand', 'Start');

I dont know, where to define time to pause simulation (I need to stop simulation to change parameters and then run). Is there a way how to define time of pause in cmd

set_param('YourModel', 'SimulationCommand', 'Pause')?

Is it possible to set time of simulation in cmd by means of set_param(.....)?

I use sim('YourModel',time).

Thank you.

regards

Matus

[TAB]

As far as i know, there is no option for puasing simulation at a specific time. You only can set the stop time to stop simulation at a specific time.

You can change the simulation stop time using using command set_param('YourModel','StopTime','Value').

Also you can read the current simulation time in the script using get_param(YourModel,'SimulationTime') and apply the logic whatever you want.

[Matus]

thank you

[Kaustubha Govind]

Since you are presumably changing only tunable parameters, you could also try using the SimState (save/restore) feature. First run your model to a certain time (say t=10) and save the final state using SimState. Then, change the tunable parameters as needed, load the SimState and run the model upto t=20. If the SimState is valid (ie. the only changes in your model since the SimState has been saved is the values of tunable parameters), the simulation will run from t=10 to t=20 only.

[Matus]

thank you, i will try

[Matus]

Thank you Kaustubha, it works great.