Hi Ting,
You can connect “compare to constant” block to the signal “x” and then connect the output of that block to “stop simulation” block. In the compare to constant block, you can set the “operator” parameter to “>” and “constant value” parameter to “a”. This setup will stop the simulation when the value of signal “x” exceeds the limit “a”.
Below is an example of “ramp” signal with slope 1 which is set to stop when the signal value exceeds 3.
The output in scope is –
The simulation stops after T=3 when the signal value exceeds 3.
You can check the below documentation links to learn more about the “stop simulation” and “compare to constant” blocks –
“stop simulation” - https://www.mathworks.com/help/simulink/slref/stopsimulation.html
“compare to constant” - https://www.mathworks.com/help/simulink/slref/comparetoconstant.html
I hope this answers your question.
