A robot is an intelligent machine that can sense the environment around it, make decisions based on computations, and then perform some actions based on the decisions.
The major components of robots are actuators( motors), sensors, and computational units. The computational unit is called the brain of the robot, which helps in decision-making. Some examples of computational units are microcontrollers, Single-board computers, and PLC. The actions of robots are based on the program running on a microcontroller or PC.
A simulation imitates the operation of real world processes or systems with the use of models. The model represents the key behaviors and characteristics of the selected process or system while the simulation represents how the model evolves under different conditions over time.
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