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arXiv 2202.09268cs.RO
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在并联机器人中使用对偶四元数的李导数

Using Lie derivatives with dual quaternions for parallel robots

University of Missouri(密苏里大学);Johnson Space Center(约翰逊航天中心)

Stephen Montgomery-Smith, Cecil Shy

AI总结:

本文提出在对偶四元数框架下引入李导数,用于分析并联机器人中执行器对末端执行器的影响,并结合Newton-Raphson方法求解过约束正运动学,最终推导包含执行器惯量的运动方程。

摘要:

我们引入了在表示刚体运动与旋量的对偶四元数语境下的李导数概念。首先,我们以对偶四元数定义力旋量。然后,我们展示李导数如何帮助理解并联机器人中执行器对末端执行器的影响,并在Stewart平台和绳索驱动并联机器人两种情形中明确给出这一关系。我们还展示了如何将李导数与Newton-Raphson方法结合,以求解过约束并联执行器的正运动学问题。最后,我们推导出末端执行器在对偶四元数形式下的运动方程,其中包含了执行器惯量的影响。

英文摘要:

We introduce the notion of the Lie derivative in the context of dual quaternions that represent rigid motions and twists. First we define the wrench in terms of dual quaternions. Then we show how the Lie derivative helps understand how actuators affect an end effector in parallel robots, and make it explicit in the two cases case of Stewart Platforms, and cable-driven parallel robots. We also show how to use Lie derivatives with the Newton-Raphson Method to solve the forward kinematic problem for over constrained parallel actuators. Finally, we derive the equations of motion of the end effector in dual quaternion form, which include the effect of inertia from the actuators.

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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