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arXiv 2106.08796cs.ROcs.AI
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通过Real-to-Sim图像转换的触觉Sim-to-Real策略传输

Tactile Sim-to-Real Policy Transfer via Real-to-Sim Image Translation

University of Bristol(布里斯托大学);Google Deepmind(谷歌DeepMind)

Alex Church, John Lloyd, Raia Hadsell, Nathan F. Lepora

摘要:

模拟最近已经成为深度强化学习的关键,可以安全有效地从视觉和本体感受输入中获取通用和复杂的控制策略。触觉信息通常不被考虑,尽管它直接关系到环境的相互作用。在这项工作中,我们提出了一套适合触觉机器人和强化学习的模拟环境。提供了一种模拟光学触觉传感器的简单且快速的方法,其中高分辨率接触几何形状被表示为深度图像。最近策略优化(PPO)用于在所有考虑的任务中学习成功的策略。数据驱动的方法使得能够将真实触觉传感器的当前状态转换为对应的模拟深度图像。该策略在物理机器人上的实时控制回路内实现,以在需要触觉的几个物理交互任务上演示zero-shot模拟到真实的策略转移。

英文摘要:

Simulation has recently become key for deep reinforcement learning to safely and efficiently acquire general and complex control policies from visual and proprioceptive inputs. Tactile information is not usually considered despite its direct relation to environment interaction. In this work, we present a suite of simulated environments tailored towards tactile robotics and reinforcement learning. A simple and fast method of simulating optical tactile sensors is provided, where high-resolution contact geometry is represented as depth images. Proximal Policy Optimisation (PPO) is used to learn successful policies across all considered tasks. A data-driven approach enables translation of the current state of a real tactile sensor to corresponding simulated depth images. This policy is implemented within a real-time control loop on a physical robot to demonstrate zero-shot sim-to-real policy transfer on several physically-interactive tasks requiring a sense of touch.

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