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Sim-to-Real Transfer in Deep Reinforcement Learning for Robotics: a Survey - 2020

Sim-To-Real Transfer In Deep Reinforcement Learning For Robotics: A Survey

Research Area:  Machine Learning


Deep reinforcement learning has recently seen huge success across multiple areas in the robotics domain. Owing to the limitations of gathering real-world data, i.e., sample inefficiency and the cost of collecting it, simulation environments are utilized for training the different agents. This not only aids in providing a potentially infinite data source, but also alleviates safety concerns with real robots. Nonetheless, the gap between the simulated and real worlds degrades the performance of the policies once the models are transferred into real robots. Multiple research efforts are therefore now being directed towards closing this sim-toreal gap and accomplish more efficient policy transfer. Recent years have seen the emergence of multiple methods applicable to different domains, but there is a lack, to the best of our knowledge, of a comprehensive review summarizing and putting into context the different methods. In this survey paper, we cover the fundamental background behind sim-to-real transfer in deep reinforcement learning and overview the main methods being utilized at the moment: domain randomization, domain adaptation, imitation learning, meta-learning and knowledge distillation. We categorize some of the most relevant recent works, and outline the main application scenarios. Finally, we discuss the main opportunities and challenges of the different approaches and point to the most promising directions.


Author(s) Name:  Wenshuai Zhao; Jorge Peña Queralta; Tomi Westerlund

Journal name:  

Conferrence name:  IEEE Symposium Series on Computational Intelligence (SSCI)

Publisher name:  IEEE

DOI:  10.1109/SSCI47803.2020.9308468

Volume Information: