We consider the problem of learning useful robotic skills from previously collected offline data without access to manually specified rewards or additional online exploration, a setting that is becoming increasingly important for scaling robot learning by reusing past robotic data. In particular, we propose the objective of learning a functional understanding of the environment by learning to reach any goal state in a given dataset. We employ goal-conditioned Q-learning with hindsight relabeling and develop several techniques that enable training in a particularly challenging offline setting. We find that our method can operate on high-dimensional camera images and learn a variety of skills on real robots that generalize to previously unseen scenes and objects. We also show that our method can learn to reach long-horizon goals across multiple episodes, and learn rich representations that can help with downstream tasks through pre-training or auxiliary objectives. The videos of our experiments can be found at https://actionable-models.github.io

本文提出了使用自回归进行离线机器人技能学习，并通过先前的数据学习环境的形式理解，该方法可以处理高维相机图像，可以学习到许多技能，并通过一系列技术进行训练，此方法具有较强的泛化能力，可以在多个目标之间进行目标链接，通过预训练或辅助目标学习到丰富的表示。

可执行模型: 无监督离线强化学习的机器人技能