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arXiv 1810.03076cs.ROcs.LGcs.SYeess.SY
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人形轮式反重力摆机器人在线质心估计

Online Center of Mass Estimation for a Humanoid Wheeled Inverted Pendulum Robot

Munzir Zafar, Akash Patel, Bogdan Vlahov, Nathaniel Glaser, Sergio Aguillera, Seth Hutchinson

AI总结:

本文提出了一种新颖的鲁棒控制与在线学习结合的方法,用于平衡具有n自由度的轮式反重力摆人形机器人,通过在线学习更新质量模型以获得更准确的质心估计,实验表明该方法提升了整体控制效率。

摘要:

我们提出了一种新颖的鲁棒控制和在线学习应用,用于平衡具有n个自由度(DoF)的轮式反重力摆(WIP)人形机器人。我们的技术将质量模型的不准确性转化为质心(CoM)误差,并在存在误差的情况下实现平衡,同时利用在线学习更新质量模型以获得更好的质心估计。使用我们机器人的模拟模型,我们元学习了一组激励关节姿态,使我们的梯度下降算法快速收敛到准确的(CoM)估计。该模拟流程完全在线执行,使用主动扰动抵消来解决由于持续演变的质量模型所产生的质量误差。在19个自由度的WIP上进行了实验,我们手动获取了学习姿态集的数据,并展示了由梯度下降产生的质量模型产生的质心估计能够提高整体控制和效率。本工作为Golem Krang人形机器人整体控制贡献了更丰富的文献。

英文摘要:

We present a novel application of robust control and online learning for the balancing of a n Degree of Freedom (DoF), Wheeled Inverted Pendulum (WIP) humanoid robot. Our technique condenses the inaccuracies of a mass model into a Center of Mass (CoM) error, balances despite this error, and uses online learning to update the mass model for a better CoM estimate. Using a simulated model of our robot, we meta-learn a set of excitory joint poses that makes our gradient descent algorithm quickly converge to an accurate (CoM) estimate. This simulated pipeline executes in a fully online fashion, using active disturbance rejection to address the mass errors that result from a steadily evolving mass model. Experiments were performed on a 19 DoF WIP, in which we manually acquired the data for the learned set of poses and show that the mass model produced by a gradient descent produces a CoM estimate that improves overall control and efficiency. This work contributes to a greater corpus of whole body control on the Golem Krang humanoid robot.

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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