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arXiv 2001.06324cs.RO

Robust 2 1/2D Visual Servoing of a Cable-Driven Parallel Robot Thanks to Trajectory Tracking

Laboratoire des Sciences du Numérique de Nantes(南特数字科学实验室);CNRS(法国国家科学研究中心);IRT Jules Verne(儒勒·凡尔纳研究院);Inria(法国国家信息与自动化研究所);Univ Rennes(雷恩大学);IRISA(雷恩信息与自动化系统研究所)

Zane Zake, François Chaumette, Nicolò Pedemonte, Stéphane Caro

英文摘要:

Cable-Driven Parallel Robots (CDPRs) are a kind of parallel robots that have cables instead of rigid links. Implementing vision-based control on CDPRs leads to a good final accuracy despite modeling errors and other perturbations in the system. However, unlike final accuracy, the trajectory to the goal can be affected by the perturbations in the system. This paper proposes the use of trajectory tracking to improve the robustness of 2 1/2 D visual servoing control of CDPRs. Lyapunov stability analysis is performed and, as a result, a novel workspace, named control stability workspace, is defined. This workspace defines the set of moving-platform poses where the robot is able to execute its task while being stable. The improvement of robustness is clearly shown in experimental validation.

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