The artificial gravity generator was a major component of the artificial gravity system aboard starships and shuttles. The artificial gravity generator changed the environment of a starship from zero gravity to artificial gravity, using the vessel's gravity plating.
In 2293 the gravity generator on board Kronos One was damaged when the vessel was fired upon by Chang's Bird-of-Prey. During this time Burke and Samno wearing gravity boots beamed aboard and assassinated Gorkon before the auxiliary units restored gravity. (Star Trek VI: The Undiscovered Country)