Distributed Reinforcement Learning for Robot Teams: A Review

• URL: http://arxiv.org/abs/2204.03516v1
• Date: Thu, 7 Apr 2022 15:34:19 GMT
• Title: Distributed Reinforcement Learning for Robot Teams: A Review
• Authors: Yutong Wang and Mehul Damani and Pamela Wang and Yuhong Cao and Guillaume Sartoretti
• Abstract summary: Recent advances in sensing, actuation, and computation have opened the door to multi-robot systems. Community has leveraged model-free multi-agent reinforcement learning to devise efficient, scalable controllers for multi-robot systems. Recent findings: Decentralized MRS face fundamental challenges, such as non-stationarity and partial observability.
• Score: 10.92709534981466
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Purpose of review: Recent advances in sensing, actuation, and computation have opened the door to multi-robot systems consisting of hundreds/thousands of robots, with promising applications to automated manufacturing, disaster relief, harvesting, last-mile delivery, port/airport operations, or search and rescue. The community has leveraged model-free multi-agent reinforcement learning (MARL) to devise efficient, scalable controllers for multi-robot systems (MRS). This review aims to provide an analysis of the state-of-the-art in distributed MARL for multi-robot cooperation. Recent findings: Decentralized MRS face fundamental challenges, such as non-stationarity and partial observability. Building upon the "centralized training, decentralized execution" paradigm, recent MARL approaches include independent learning, centralized critic, value decomposition, and communication learning approaches. Cooperative behaviors are demonstrated through AI benchmarks and fundamental real-world robotic capabilities such as multi-robot motion/path planning. Summary: This survey reports the challenges surrounding decentralized model-free MARL for multi-robot cooperation and existing classes of approaches. We present benchmarks and robotic applications along with a discussion on current open avenues for research.

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