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arXiv 2010.03368cs.ROcs.SYeess.SY
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用类肌肉驱动控制 CyberOctopus 软体臂

Controlling a CyberOctopus Soft Arm with Muscle-like Actuation

University of Illinois at Urbana-Champaign(伊利诺伊大学厄巴纳-香槟分校);Coordinated Science Laboratory(协调科学实验室);National Center for Supercomputing Applications(国家超级计算应用中心);Carl R. Woese Institute for Genomic Biology(卡尔·R·沃斯基因组生物学研究所)

Heng-Sheng Chang, Udit Halder, Ekaterina Gribkova, Arman Tekinalp, Noel Naughton, Mattia Gazzola, Prashant G. Mehta

AI总结:

针对章鱼软体臂,本文建立真实内部肌肉结构的面向控制模型,并将其融入能量整形方法,通过引入肌肉储能函数与双层迭代优化实现控制,在 Elastica 中完成仿真验证。

摘要:

本文展示了能量整形方法在控制章鱼单臂的柔性弹性 Cosserat 杆模型方面的应用。本工作的新颖贡献有两方面:(i)对章鱼臂解剖学上真实的内部肌肉结构进行面向控制的建模;(ii)将这些肌肉模型集成到能量整形控制方法中。面向控制的建模同等程度地借鉴了非线性弹性理论与能量整形控制理论。通过为肌肉引入储能函数,避免了与显式求解能量整形方法匹配条件相关的困难。整体控制设计问题被表述为一个双层优化问题,并通过迭代算法获得其解。该方法在全尺寸动态仿真环境 Elastica 中进行了数值实现和演示。文中报告了两个涉及章鱼臂控制的仿生数值实验。

英文摘要:

This paper presents an application of the energy shaping methodology to control a flexible, elastic Cosserat rod model of a single octopus arm. The novel contributions of this work are two-fold: (i) a control-oriented modeling of the anatomically realistic internal muscular architecture of an octopus arm; and (ii) the integration of these muscle models into the energy shaping control methodology. The control-oriented modeling takes inspiration in equal parts from theories of nonlinear elasticity and energy shaping control. By introducing a stored energy function for muscles, the difficulties associated with explicitly solving the matching conditions of the energy shaping methodology are avoided. The overall control design problem is posed as a bilevel optimization problem. Its solution is obtained through iterative algorithms. The methodology is numerically implemented and demonstrated in a full-scale dynamic simulation environment Elastica. Two bio-inspired numerical experiments involving the control of octopus arms are reported.

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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