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Transfer Learning for Efficient Iterative Safety Validation

2020-12-09 21:54:54
Anthony Corso, Mykel J. Kochenderfer

Abstract

Safety validation is important during the development of safety-critical autonomous systems but can require significant computational effort. Existing algorithms often start from scratch each time the system under test changes. We apply transfer learning to improve the efficiency of reinforcement learning based safety validation algorithms when applied to related systems. Knowledge from previous safety validation tasks is encoded through the action value function and transferred to future tasks with a learned set of attention weights. Including a learned state and action value transformation for each source task can improve performance even when systems have substantially different failure modes. We conduct experiments on safety validation tasks in gridworld and autonomous driving scenarios. We show that transfer learning can improve the initial and final performance of validation algorithms and reduce the number of training steps.

Abstract (translated)

URL

https://arxiv.org/abs/2012.05336

PDF

https://arxiv.org/pdf/2012.05336.pdf


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