The introduction of actuator

An actuator is a part of a machine that moves and controls a mechanism or system, for example by opening a valve. Simply put, it is an "enabler". Actuators need to control signals and power sources. The control signals are relatively low energy and can be voltage or current, pneumatic or hydraulic, or even human. The main energy source can be electric current, hydraulic fluid pressure or pneumatic pressure. When it receives a control signal, the actuator responds by converting the energy of the signal into mechanical motion.