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What is the reality gap in robotics?

  • A.The delay between issuing a command and the robot executing it
  • B.The distance a robot can travel before its battery is exhausted
  • C.The difference between a robot's stated and achieved accuracy
  • D.The difference between simulated and real world behaviour of a controller

Answer: D

A policy trained in simulation often fails on hardware because the simulator's physics, sensor noise and dynamics differ from reality, and closing that gap through domain randomisation or system identification is an active research problem. Latency, endurance and specification accuracy are separate engineering concerns. A model that is good enough for design but not for training is a distinction worth drawing carefully, since the two uses place very different demands on fidelity.

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