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arXiv 2103.16747cs.RO
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基于物理仿真和学习潜在投影的机器人触觉感知拟真

Sim-to-Real for Robotic Tactile Sensing via Physics-Based Simulation and Learned Latent Projections

NVIDIA Corporation(英伟达公司);Paul G. Allen School of Computer Science & Engineering, University of Washington(华盛顿大学保罗·G·艾伦计算机科学与工程学院)

Yashraj Narang, Balakumar Sundaralingam, Miles Macklin, Arsalan Mousavian, Dieter Fox

摘要:

触觉感知对于机器人在视觉遮挡下抓取和操纵物体至关重要。然而,与机器人手臂和相机的模拟相比,触觉传感器的当前模拟具有有限的准确性、速度和实用性。在这项工作中,我们开发了一个有效的三维有限元法(FEM)模型的SynTouch BioTac传感器使用开放访问,基于GPU的机器人模拟器。我们的模拟在行业标准的基于CPU的模拟器中精确再现了实验验证模型的结果,但速度是75倍。然后,我们通过自我监督学习模拟BioTac变形和真实世界电气输出的潜在表示,以及使用小型监督数据集进行潜在空间之间的投影。使用这些学习到的潜在投影,我们准确地合成了真实世界的BioTac电输出,并估计了接触贴片,这两个都是看不见的接触相互作用。这项工作有助于一个有效的,可自由访问的有限元模型的BioTac,并包括第一次努力结合自我监督,跨模态传输,和仿真到现实迁移的触觉传感器。

英文摘要:

Tactile sensing is critical for robotic grasping and manipulation of objects under visual occlusion. However, in contrast to simulations of robot arms and cameras, current simulations of tactile sensors have limited accuracy, speed, and utility. In this work, we develop an efficient 3D finite element method (FEM) model of the SynTouch BioTac sensor using an open-access, GPU-based robotics simulator. Our simulations closely reproduce results from an experimentally-validated model in an industry-standard, CPU-based simulator, but at 75x the speed. We then learn latent representations for simulated BioTac deformations and real-world electrical output through self-supervision, as well as projections between the latent spaces using a small supervised dataset. Using these learned latent projections, we accurately synthesize real-world BioTac electrical output and estimate contact patches, both for unseen contact interactions. This work contributes an efficient, freely-accessible FEM model of the BioTac and comprises one of the first efforts to combine self-supervision, cross-modal transfer, and sim-to-real transfer for tactile sensors.

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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