arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1802.05313cs.AIcs.LGstat.ML
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不完全演示的强化学习

Reinforcement Learning from Imperfect Demonstrations

UC Berkeley(加州大学伯克利分校);Tsinghua University(清华大学)

Yang Gao, Huazhe Xu, Ji Lin, Fisher Yu, Sergey Levine, Trevor Darrell

摘要:

强大的现实世界学习应该受益于演示和与环境的互动。当前从演示和奖励中学习的方法对专家演示数据执行监督学习,并使用强化学习来基于从环境接收的奖励进一步提高性能。这些任务具有难以共同优化的发散损失,并且这种方法可能对噪声演示非常敏感。我们提出了一个统一的强化学习算法,归一化的演员-评论家(NAC),有效地规范化的Q函数,减少Q值的动作中看不见的演示数据。NAC从演示中学习初始策略网络,并在环境中改进策略,超越演示者的性能。至关重要的是,从演示示教学习和交互式改进使用相同的目标,不像以前的方法,结合不同的监督和强化损失。这使得NAC对次优演示数据具有鲁棒性,因为该方法不需要模仿数据集中的所有示例。我们证明了我们的统一强化学习算法可以鲁棒地学习,并在几个现实的驾驶游戏中进行评估时优于现有的基线。

英文摘要:

Robust real-world learning should benefit from both demonstrations and interactions with the environment. Current approaches to learning from demonstration and reward perform supervised learning on expert demonstration data and use reinforcement learning to further improve performance based on the reward received from the environment. These tasks have divergent losses which are difficult to jointly optimize and such methods can be very sensitive to noisy demonstrations. We propose a unified reinforcement learning algorithm, Normalized Actor-Critic (NAC), that effectively normalizes the Q-function, reducing the Q-values of actions unseen in the demonstration data. NAC learns an initial policy network from demonstrations and refines the policy in the environment, surpassing the demonstrator's performance. Crucially, both learning from demonstration and interactive refinement use the same objective, unlike prior approaches that combine distinct supervised and reinforcement losses. This makes NAC robust to suboptimal demonstration data since the method is not forced to mimic all of the examples in the dataset. We show that our unified reinforcement learning algorithm can learn robustly and outperform existing baselines when evaluated on several realistic driving games.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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