Simulator

n. device that enables the user learn or practice a skill under simulated conditions to prepare for actual performance; pretender, imitator

A simulation is an imitation of some real thing, state of affairs, or process. The act of simulating something generally entails representing certain key characteristics or behaviours of a selected physical or abstract system. Historically, the word had negative connotations: …for Distinction Sake, a Deceiving by Words, is commonly called a Lye, and a Deceiving by Actions, Gestures, or Behavior, is called Simulation… Robert South (1643–1716) However, the connection between simulation and dissembling later faded out and is now only of linguistic interest.
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Simulator /sim·u·la·tor/ something that simulates, such as an apparatus that simulates conditions that will be encountered in real life. [more]Simulator - Community and Resources

Noun
1. a machine that simulates an environment for the purpose of training or research
(hypernym) machine
(hyponym) flight simulator, trainer
(derivation) model, simulate

n. simulator, device that enables the user learn or practice a skill under simulated conditions to prepare for actual performance; pretender, imitator