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arXiv 1104.0769cs.RO
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具有被动关节的机械臂刚度增强建模

Enhanced stiffness modeling of manipulators with passive joints

Ecole des Mines de Nantes(南特矿业学院);Institut de Recherches en Communications et en Cybernetique de Nantes(南特通信与控制研究所)

Anatoly Pashkevich, Alexandr Klimchik, Damien Chablat

摘要:

本文提出了一种增强具有被动关节的串并联机器人刚度分析的方法。它直接考虑到负载对机械手配置的影响,因此,对它的雅可比矩阵和海森矩阵。本文的主要贡献是引入了一个非线性刚度模型的被动关节的机械手,一个相关的数值技术,其线性化和计算的笛卡尔刚度矩阵,允许秩亏。在所开发的技术中,机械手元素被呈现为由多维虚拟弹簧和完美的被动关节分离的伪刚体。模拟的例子,处理并联机器人的Orthodox家庭和展示的能力,所开发的方法来描述非线性行为的机械手结构,如弹性不稳定性的突然变化(屈曲)。

英文摘要:

The paper presents a methodology to enhance the stiffness analysis of serial and parallel manipulators with passive joints. It directly takes into account the loading influence on the manipulator configuration and, consequently, on its Jacobians and Hessians. The main contributions of this paper are the introduction of a non-linear stiffness model for the manipulators with passive joints, a relevant numerical technique for its linearization and computing of the Cartesian stiffness matrix which allows rank-deficiency. Within the developed technique, the manipulator elements are presented as pseudo-rigid bodies separated by multidimensional virtual springs and perfect passive joints. Simulation examples are presented that deal with parallel manipulators of the Ortholide family and demonstrate the ability of the developed methodology to describe non-linear behavior of the manipulator structure such as a sudden change of the elastic instability properties (buckling).

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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