An actuator is a technical component that performs movements or physical actions by converting signals—usually electrical or digital—into mechanical energy. This energy enables it to trigger motion, change positions, or control processes. In practical terms, an actuator might power a motor, open a valve, or move a robotic arm. It acts as the link between the control system (signal input) and the mechanical execution (physical action). Without actuators, many automated systems such as machines, vehicles, or building control technologies could not physically carry out commands.
