servomechanism

A feedback system that consists of a sensing element, amplifier, and servomotor, used in the automatic control of a mechanical device.

A self-regulating feedback system or mechanism.

an electronically controlled mechanical or hydraulic device permitting a large action or strong forces to be controlled by a small electrical signal.

Any system which controls motion automatically using feedback.

control system that converts a small mechanical motion into one requiring much greater power; may include a negative feedback system