視覚的曲率フィードバックによる線状柔軟物体のモデルベース操作
Model-Based Manipulation of Linear Flexible Objects with Visual Curvature Feedback
ケーブルのような線状柔軟物体を、2つの投影面の曲率で形状モデル化し、視覚フィードバックで把持点と先端の位置姿勢を追従して閉ループ操作する手法を提案し、電源ケーブルの抜き差しタスクを30秒以内に自律遂行できることを示した。
著者: Peng Chang, Taskin Padir
分類: cs.RO
原文アブストラクト
Manipulation of deformable objects is a desired skill in making robots ubiquitous in manufacturing, service, healthcare, and security. Deformable objects are common in our daily lives, e.g., wires, clothes, bed sheets, etc., and are significantly more difficult to model than rigid objects. In this study, we investigate vision-based manipulation of linear flexible objects such as cables. We propose a geometric modeling method that is based on visual feedback to develop a general representation of the linear flexible object that is subject to gravity. The model characterizes the shape of the object by combining the curvatures on two projection planes. In this approach, we achieve tracking of the position and orientation (pose) of a cable-like object, the pose of its tip, and the pose of the selected grasp point on the object, which enables closed-loop manipulation of the object. We demonstrate the feasibility of our approach by completing the Plug Task used in the 2015 DARPA Robotics Challenge Finals, which involves unplugging a power cable from one socket and plugging it into another. Experiments show that we can successfully complete the task autonomously within 30 seconds.
