A device that makes something move or work by getting a signal or change.
The actuator in the car made the window go up and down.
車のアクチュエータが窓を上げ下げさせます。
A part in robots and machines that makes them move to do something.
The robot used actuators to move its arms and legs.
ロボットは腕や足を動かすためにアクチュエータを使用しました。