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Author Xin Xin ♦ Jin-Hua She ♦ Yamasaki, T.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2008
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations ♦ Other branches of engineering
Subject Keyword Robot kinematics ♦ Motion control ♦ Lyapunov method ♦ Motion analysis ♦ Robot control ♦ Actuators ♦ Computer science ♦ Numerical simulation ♦ Costs ♦ Angular velocity control
Abstract In this paper, we concern a swing-up control problem for an n-link revolute planar robot with any one of the joint being a passive joint. The goal of this study is to design and analyze a swing-up controller that can bring the robot into any arbitrarily small neighborhood of the upright equilibrium point with all links in the upright position. To achieve this challenging objective while preventing the robot from becoming stuck at an undesired closed-loop equilibrium point, first, we address how to iteratively devise two series of virtual composite links separated by the passive joint to be used for designing a coordinate transformation on the angles of all active joints. Second, we devise an energy based swing-up controller that uses a new Lyapunov function based on that transformation. Third, we analyze the global motion of the robot under the controller and establish conditions on control parameters that ensure attainment of the swing-up control objective. The results obtained here unify some previous results for the Pendubot, the Acrobot, and three-link robots with a passive first joint. Finally, we validate the theoretical results via a numerical simulation investigation to a 4-link robot with a passive joint.
Description Author affiliation: Fac. of Comput. Sci. & Syst. Eng., Okayama Prefectural Univ., Soja, Japan (Xin Xin; Yamasaki, T.) || Comput. Sci., Tokyo Univ. of Technol., Hachioji, Japan (Jin-Hua She)
ISBN 9781424431236
ISSN 01912216
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2008-12-09
Publisher Place Mexico
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 247.59 kB
Page Count 6
Starting Page 4339
Ending Page 4344


Source: IEEE Xplore Digital Library