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Practical Point-to-Point Multiple-Goal Task Realization in a Robot Arm with a Rotating Table

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Abstract:

This study presents a multiple-goal task realization in a system composed of a 6-d.o.f. robot arm and a one-axis rotating table. The problem is complex due to the existence of multiple goals and the kinematic redundancy of the system. We propose a design approach integrating the base placement, task sequencing and motion coordination methods. We show that this approach reduces the task completion time of the robot arm; the motion planning is realized through straight-line paths in the configuration space despite collision occurrences. Furthermore, we introduce a hybrid graph-search method combining the greedy nearest-neighbor method and the Dijkstra method to solve the motion coordination of the robot arm and the table. We show the effectiveness of the design approach and the search method through a time-constrained simulation-based optimization.

Keywords: MANIPULATOR SYSTEM; MULTIPLE-GOAL TASK; PATH PLANNING; WORK CELL OPTIMIZATION

Document Type: Research Article

DOI: http://dx.doi.org/10.1163/016918611X563274

Affiliations: 1: Research into Artifacts, Center for Engineering, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8568, Japan;, Email: gueta@race.u-tokyo.ac.jp 2: Faculty of System Design, Tokyo Metropolitan University, 6-6, Asahigaoka, Hino-shi, Tokyo 191-0065, Japan 3: Department of Precision Engineering, Graduate School of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan 4: DENSO WAVE Inc., 1-1 Yoshiike, Kusaki, Agui-cho, Chita-gun, Aichi 470-2297, Japan 5: Research into Artifacts, Center for Engineering, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8568, Japan

Publication date: January 1, 2011

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