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arXiv 2005.03153cs.RO
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刚体协同操作的分散自适应控制

Decentralized Adaptive Control for Collaborative Manipulation of Rigid Bodies

Stanford University(斯坦福大学);Massachusetts Institute of Technology(麻省理工学院)

Preston Culbertson, Jean-Jacques E. Slotine, Mac Schwager

摘要:

在这项工作中,我们考虑一组机器人一起工作,以操纵一个刚性物体跟踪所需的轨迹在$SE(3)$。机器人不知道物体的质量或摩擦特性,也不知道它们附着在物体上的位置。然而,他们可以访问一个共同的状态测量,无论是从一个机器人广播其测量到团队,或通过所有机器人通信和平均其状态测量,以估计其质心的状态。为了解决这个问题,我们提出了一个分散的自适应控制方案,其中每个代理维护和适应自己的估计的对象参数,以跟踪参考轨迹。我们提出了一个控制器的行为分析,并表明,所有的闭环信号保持有界,并且系统的轨迹几乎总是(除了初始条件上的一组测量零)收敛到所需的轨迹。我们研究所提出的控制器的性能,使用数值模拟的操作任务在3D中,以及硬件实验,证明我们的算法在平面操作任务。这些研究,结合起来,证明了所提出的控制器的有效性,即使在存在许多未建模的影响,如离散化误差和复杂的摩擦相互作用。

英文摘要:

In this work, we consider a group of robots working together to manipulate a rigid object to track a desired trajectory in $SE(3)$. The robots do not know the mass or friction properties of the object, or where they are attached to the object. They can, however, access a common state measurement, either from one robot broadcasting its measurements to the team, or by all robots communicating and averaging their state measurements to estimate the state of their centroid. To solve this problem, we propose a decentralized adaptive control scheme wherein each agent maintains and adapts its own estimate of the object parameters in order to track a reference trajectory. We present an analysis of the controller's behavior, and show that all closed-loop signals remain bounded, and that the system trajectory will almost always (except for initial conditions on a set of measure zero) converge to the desired trajectory. We study the proposed controller's performance using numerical simulations of a manipulation task in 3D, as well as hardware experiments which demonstrate our algorithm on a planar manipulation task. These studies, taken together, demonstrate the effectiveness of the proposed controller even in the presence of numerous unmodeled effects, such as discretization errors and complex frictional interactions.

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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