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A Framework for Large-Force Task Planning of Mobile and Redundant Manipulators

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National Technical University of Athens   

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A Framework for Large-Force Task Planning of Mobile and Redundant Manipulators (EN)
Gonthier, Y (EN)
Papadopoulos, E (EN)
journalArticle (EN)
2014-03-01T01:14:18Z
1999 (EN)
A framework tackling the problem of large wrench application using robotic systems with limited force or torque actuators is presented. It is shown that such systems can apply a wrench to a limited set of Cartesian locations called force workspace (FW), and its force capabilities are improved by employing base mobility and redundancy. An efficient numerical algorithm. based on 2(n)-tree decomposition of Cartesian space is designed to generate FW. Based on the FW generation algorithm, a planning method is presented resulting in proper base positioning relative to large-force quasistatic tasks. Additionally, the case of tasks requiring application of a wrench along a given path is considered. Task workspace, the set of Cartesian space locations that are feasible starting positions for such tasks, is shown to be a subset of FW. This workspace is used for identifying prc,per base or task positions guaranteeing task execution along desired paths. Finally, to plan redundant manipulator postures during large-force-tasks, a new method based on a min-max optimization scheme is developed. Unlike norm-based methods, this method guarantees no actuator capabilities are exceeded, and force or torque of the most loaded joint is minimized. Illustrative examples are given demonstrating validity and usefulness of the proposed framework. (C) 1999 John Wiley & Sons, Inc. (EN)
Robotics (EN)
Large-force task planning (EN)
Actuators (EN)
Control system analysis (EN)
Redundancy (EN)
Position control (EN)
Force workspace (FW) (EN)
Manipulators (EN)
Mobile robots (EN)
Robotics (EN)
Motion planning (EN)
Algorithms (EN)
Cartesian locations (EN)
Torque control (EN)
Control system synthesis (EN)
Trees (mathematics) (EN)
Force control (EN)
Journal of Robotic Systems (EN)
English
JOHN WILEY & SONS INC (EN)
National Technical University of Athens
Digital Library of National Technical University of Athens | Dspace@NTUA
Κεντρική Βιβλιοθήκη Ε.Μ.Π.
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