arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1107.4498cs.RO
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对称平面3- RPR机器人的奇异曲面和尖点

Singular surfaces and cusps in symmetric planar 3-RPR manipulators

Institut de Recherche Mathématique de Rennes(雷恩数学研究所);Université de Rennes I(雷恩第一大学);Institut de Recherche en Communications et Cybernétique de Nantes(南特通信与控制研究所)

Michel Coste, Philippe Wenger, Damien Chablat

摘要:

本文研究了一类3-RPR机器人,其运动学正问题(DKP)被分解为三次问题和二次问题。这些操作器的几何特征在于,移动三角形是通过间接等距的基础三角形的图像。我们介绍了一个特定的坐标系,适应这种几何特征,这也是很好地适应分裂的DKP。这使我们能够容易地获得精确的描述的奇点和尖点边缘。这些后二阶奇异性是重要的非奇异装配模式的变化。我们将展示如何对装配模式进行排序,并将此排序用于关节空间中的运动规划。

英文摘要:

We study in this paper a class of 3-RPR manipulators for which the direct kinematic problem (DKP) is split into a cubic problem followed by a quadratic one. These manipulators are geometrically characterized by the fact that the moving triangle is the image of the base triangle by an indirect isometry. We introduce a specific coordinate system adapted to this geometric feature and which is also well adapted to the splitting of the DKP. This allows us to obtain easily precise descriptions of the singularities and of the cusp edges. These latter second order singularities are important for nonsingular assembly mode changing. We show how to sort assembly modes and use this sorting for motion planning in the joint space.

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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