matlab simulink simstate issue

hi everyone,

I am trying to use Simstate to stop, save and reload my model in order to save my data a couple of times before the whole simulation is actually done.

I've tried using :

set_param('mysim','SaveFinalState','on','FinalStateName','myOperPoint','SaveCompleteFinalSimState','on');

sim('mysim','StopTime','10');

set_param('mysim','LoadInitialState','on','InitialState','myOperPoint');

sim('mysim','StopTime','20');

but it seems that the model save "myOperPoint" isn't getting saved if the model does not reach it's actual end.

Does anyone have a clue how to actually use this because the official tutorial isn't helping me much.

Answer 1

[Jim Riggs]

I notice the same thing. If I use this, then SimState is not saved:

set_param('mysim','SaveFinalState','on','FinalStateName','myOperPoint','SaveCompleteFinalSimState','on');
sim('mysim','StopTime','10');

but if I do this, then the SimState is saved:

set_param('mysim','SaveFinalState','on','FinalStateName','myOperPoint','SaveCompleteFinalSimState','on');
sim('mysim');

.

[Jim Riggs]

I just tried the following, and it ran to the desired stop time and saved the SimState:

set_param('mysim','SaveFinalState','on','FinalStateName','myOperPoint','SaveCompleteFinalSimState','on');
set_param('mysim','StopTime','10');
sim('mysim');

[Jim Riggs]

Whenever I build a Simulink model, I like to set the stop time to a parameter which is defined in the Matlab workspace, e.g.

set_param('mysim','StopTime','sim_StopTime');

So, when I run the model, I define the sim_StopTime parameter in a script, and then run the model. Using this method, the following worked for me:

 set_param('mysim','SaveFinalState','on','FinalStateName','myOperPoint','SaveCompleteFinalSimState','on');

 sim_StopTime = 10.0;
 sim('mysim');   % SimState successfully saved

 set_param('mysim','LoadInitialState','on','InitialState','myOperPoint');
 sim_StopTime = 20.0;
 sim('mysim');  % Sucessfully loaded the saved SimState and ran out to 20 seconds