Running Simulink Simscape model with a vector from MATLAB script as values

Hello,

I am running the following MATLAB scipt, which calls a Simulink model:

N = 1000; % Perform N iterations 

for i = 1:1:N
    Res = 2 + 0.5*rand; % Res between 2 and 2.5 %[Ohm]
    out = sim('motor_model','simulationmode','normal');
    Mes = stepinfo(out.RotationSpeed, out.tout); % Step responce to input voltage
    SimSteadySpeed(i) = Mes.SettlingMax;
    SimSettleTime(i) = Mes.SettlingTime;
end

The simulink model represents a simple DC motor using simscape components:

The value of the resistance in 'Resistor' is defined as Res, so each time the simulink simulation is called it defines a different value to resistance:

Unfortinitly, this method is Very time consuming. I tried using 'Accelerator' and 'Rapid-Accelerator' modes, but they seem to take even longer overall (I assume MATLAB is rebuilding them every run becuase of the change is Res)

I tried using parfor, but that just got my computer stuck while 'loading the pool' or somthing like that.

Any ideas how i can run this more efficiently?

Thanks!

Answer 1

[Manoj Mirge]

The workflow mentioned can also be achieved by the parameter sweeping of the model. The parameter sweeping includes changing the block parameter values between simulation runs and comparing and analyzing the output signal data from each run.

Please refer to the below attached link to read more about the parameter sweeping:

https://www.mathworks.com/help/simulink/ug/optimize-estimate-and-sweep-block-parameter-values.html

The parameter sweeping can be optimized by running multiple simulations in parallel. This can be achieved using the “parsim” command.

Please refer to the below attached link to read more about “parsim” and how to achieve the faster parameter sweeping using “parsim”:

https://www.mathworks.com/help/simulink/ug/running-parallel-simulations.html

Hope this helps.