The definition of an actuator is: a drive device that provides linear or rotary motion, which utilizes a certain driving energy and works under the action of a certain control signal.
Actuators use liquid, gas, electricity, or other energy sources and convert them into driving action through motors, cylinders, or other devices. The basic types are part-turn, multi-turn and linear-turn. The electric actuator is mainly divided into three parts: motor, reducer, control part.
