MATLAB: How to run 2 simulink models in a sequential manner from .m script in a loop

MATLABsimulink

Actually, I have 2 simulink models in which the first model's outputs are used as input for the next model. I have used 'to' and 'from' blocks to connect one model's outputs with other. The issue is that since they are run in a loop, the workspace is not getting updated. Due to this thing, the from blocks in the 2nd model cannot read the outputs from the first model. How to overcome this issue? (Please check the attached files)

Best Answer

Do the following:

Open your first model, go to File->Model Properties->Model Properties->Callback->StopFcn and type

a=1;

then from command line, type the following:

sim('firstmodel.slx');
if a==1
   sim('secondmodel.slx');
end

Hope this helps. Let me know the results.

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This can be performed using a MATLAB Function block with a Triggered Subsystem.

The MATLAB Function block can be configured to take a clock input and output an event at a particular rate based on the time.

The attached demo model "testconditional" performs this functionality. The following example indicates what the MATLAB Function block code would look like to execute a subsystem called "controller" on a Sine Wave which is sampled at 0.1 seconds. The simulation Sample Time is 0.1 seconds. Before 10 seconds, the subsystem controller is executed at every simulation step or every 0.1 seconds. After 10 seconds, the subsystem controller is executed every 1 second.

 function fcn(u)
 %#codegen
 persistent ii 
 if isempty(ii)
     ii = 0;
 end
 ii = ii + 1;
 if u < 10
 % if time u is less than 10 seconds, execute controller every 0.1 seconds
     myfcncall();
     ii = 0;
 else 
 % if time u is greater than 10 seconds, execute controller every 0.1*10 = 1
 % seconds
     if ii > 10
         myfcncall();
         ii = 0;
     end
 end

MATLAB: How to run the simulink model for defined time

The time it takes to run a simulink model depends on the complexity of your model. If you have a small model, even you set the stop time to 100000 s, the simulation will be done in less then 1 s. If your model is complex, with a stop time set to 10 s can run for a long time, maybe hours

Best Answer

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MATLAB: How to execute a subsystem and its input at two different rates during a simulation in Simulink 7.9 (R2012a)

MATLAB: How to run the simulink model for defined time

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