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arXiv 2203.00830cs.RO
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面向协作机器人的快速物体惯性参数辨识

Fast Object Inertial Parameter Identification for Collaborative Robots

University of Toronto Institute for Aerospace Studies(多伦多大学航空航天研究所);Vector Institute(向量研究所)

Philippe Nadeau, Matthew Giamou, Jonathan Kelly

AI总结:

针对协作机器人低信噪比数据导致惯性参数辨识慢且不准的问题,提出结合刚体动力学近似与质量离散化的快速辨识方法,并通过仿真与实验验证其在典型协作工况下对现有方法的补充作用。

摘要:

协作机器人(cobots)是设计用于在以人为中心的环境中与人安全协作的机器。赋予协作机器人快速推断被操作物体惯性参数的能力,将提高其灵活性,并使其在制造及其他领域得到更广泛的应用。为确保安全,协作机器人受到运动学限制,这导致速度、加速度和力-力矩数据的信噪比(SNR)较低。这使得现有的惯性参数辨识算法速度过慢且精度不足。出于对更快模型获取的需求,我们研究了利用刚体动力学近似来提高信噪比的方法。此外,我们引入了一种质量离散化方法,该方法能够利用形状信息快速辨识被操作物体的合理惯性参数。我们提供了大量的仿真研究和真实世界实验,证明我们的方法通过专门针对典型的协作机器人工作状态,对现有惯性参数辨识方法形成了补充。

英文摘要:

Collaborative robots (cobots) are machines designed to work safely alongside people in human-centric environments. Providing cobots with the ability to quickly infer the inertial parameters of manipulated objects will improve their flexibility and enable greater usage in manufacturing and other areas. To ensure safety, cobots are subject to kinematic limits that result in low signal-to-noise ratios (SNR) for velocity, acceleration, and force-torque data. This renders existing inertial parameter identification algorithms prohibitively slow and inaccurate. Motivated by the desire for faster model acquisition, we investigate the use of an approximation of rigid body dynamics to improve the SNR. Additionally, we introduce a mass discretization method that can make use of shape information to quickly identify plausible inertial parameters for a manipulated object. We present extensive simulation studies and real-world experiments demonstrating that our approach complements existing inertial parameter identification methods by specifically targeting the typical cobot operating regime.

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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