A simulator represents relevant geometry, motion, sensing and interactions so a controller can attempt tasks in a virtual environment. It can make repeated experiments more practical and reduce the cost of some physical trials.
Simulation is an approximation. Differences in friction, sensing, timing and unmodeled events can prevent simulated success from transferring to a real robot, so physical validation and appropriate safety limits remain necessary.
ELI5
Robot simulation lets a team practice robot tasks in a computer-made setting. The robot can make mistakes there without dropping a real object or damaging equipment.
For example, developers might test whether a virtual robot can grasp a folded towel under several lighting conditions. If it succeeds, they still try the task with a real towel because fabric and lighting may behave differently.
Does simulated success prove real-world readiness?
No. The simulator may omit important conditions, so transfer needs independent physical validation.
Why use simulation?
It enables repeatable experiments and can reduce the cost and risk of exploring candidate behaviors.
