Which of the following is a synonym for actuator?

An actuator is a component of a machine or system that is responsible for moving or controlling a mechanism or system. It converts energy from a source into motion. The term "effector" aligns closely with this function, as it refers to any device that produces an effect or response in a system. In the context of control systems, an effector typically acts upon the environment or a mechanism in a manner similar to an actuator.

In contrast, a sensor is a device that detects signals or changes in the environment and does not directly produce motion or control. A controller is responsible for processing input (often from sensors) and determining what actions should be taken, but it does not directly generate physical motion. An interface serves as a medium through which users communicate with the system, facilitating interaction but not directly affecting movement or control.

Since "effector" captures the essence of functionality associated with an actuator, it is the correct synonym in this context. Understanding the relationship between these terms is essential for grasping how systems operate in fields like automation and robotics, where the distinction between sensors, actuators, controllers, and interfaces is fundamental.