Hi Please can anyone help on how to generate a pulse disturbance to test the robustness of my second order sliding mode control system. My system runs fine for 10,000 seconds. I need to apply pulse distrubance to test the robusteness. However, I could only add pulse disturbace that run the entire time of the simulation time which is 10,000 seconds. I believe disturbance should just run a fraction of the entire simulation time. for instance for 100s out of the 10,000s simulation time. Please how do i generate such pusle disturbance that would not run the entire simulation time. I want it to run for may be 100 seconds or 200s of the 10,000 seconds of the simulation time.