Is there a way to stop simulation, when an error case is met.

In simulink, if an error occurs (eg: invalid input parameters), is there a way to stop simulation at that point.

I know below options

1) Stop block - This will stop only after the current time step. I want to stop right there.

2) Assertion block - This block will do. But it is not recomended for code generation.

3) If else - This will also do.. But I am searching for any other logic for sudden stopping.

Please support.

Answer 1

[Tejas]

Hello @D D,

To abruptly stop a simulation, one approach is to use a 'MATLAB Function' block that checks whether the input is valid. If the input is found to be invalid, it triggers an error and halts the simulation.

Here is a simple example of this approach. In this case, any negative input is treated as invalid:

• Pass the input to the 'MATLAB Function' block. For more information on this block, refer to this documentation: https://www.mathworks.com/help/simulink/slref/matlabfunction.html .
• Inside the block, check for any invalid input. Use the 'error' function to stop the simulation. For more details on this function, refer to the documentation: https://www.mathworks.com/help/matlab/ref/error.html .

    function y = fcn(u)
    if u <0
        error("Invalid Input");
    end
    y = u;
    end