Safe human-robot interaction based on dynamic sphere-swept line bounding volumes

Authors:
J. A. Corrales;F. A. Candelas;F. Torres
Affiliations:
Physics, Systems Engineering and Signal Theory Department, University of Alicante, Carretera San Vicente del Raspeig s/n, 03690 San Vicente del Raspeig, Spain;Physics, Systems Engineering and Signal Theory Department, University of Alicante, Carretera San Vicente del Raspeig s/n, 03690 San Vicente del Raspeig, Spain;Physics, Systems Engineering and Signal Theory Department, University of Alicante, Carretera San Vicente del Raspeig s/n, 03690 San Vicente del Raspeig, Spain
Venue:
Robotics and Computer-Integrated Manufacturing
Year:
2011

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Abstract

This paper presents a geometric representation for human operators and robotic manipulators, which cooperate in the development of flexible tasks. The main goal of this representation is the implementation of real-time proximity queries, which are used by safety strategies for avoiding dangerous collisions between humans and robotic manipulators. This representation is composed of a set of bounding volumes based on swept-sphere line primitives, which encapsulate their links more precisely than previous sphere-based models. The radius of each bounding volume does not only represent the size of the encapsulated link, but it also includes an estimation of its motion. The radii of these dynamic bounding volumes are obtained from an algorithm which computes the linear velocity of each link. This algorithm has been implemented for the development of a safety strategy in a real human-robot interaction task.