actuator

n. person or thing which actuates, activator

An actuator is a mechanical device for moving or controlling a mechanism or system. The actuator is usually a physical mechanism but also refers to an artificial agent intelligent agent.
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Noun
1. a mechanism that puts something into automatic action
(hypernym) mechanism
(hyponym) rotary actuator, positioner
(derivation) trip, actuate, trigger, activate, set off, spark off, spark, trigger off, touch off

(n.)
One who actuates, or puts into action.
  

A mechanism that furnishes the force required to displace a control surface or other control element. 1/1/80

Dispositif fournissant la force nécessaire au déplacement d'une gouverne ou de tout autre appareil de commande. 1/1/80