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新型可重构线对称 Goldberg 6R 机构

Research output: Contribution to journalArticlepeer-review

Lei Li, Teng fei Li, Jian sheng Dai, Rui qin Wang

Translated title of the contributionA novel line-symmetric Goldberg 6R linkage with bifurcation property
Original languageChinese (Traditional)
Pages (from-to)3754-3767
Number of pages14
JournalJournal of Central South University
Volume27
Issue number12
DOIs
PublishedDec 2020

Bibliographical note

Publisher Copyright: © 2020, Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

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Abstract

This paper proposes a novel reconfigurable Goldberg 6R linkage, conformed to the construction of variant serial Goldberg 6R linkage, while simultaneously satisfying the line-symmetric Bricard qualifications. The isomeric mechanism of this novel reconfigurable mechanism is obtained in combination with the isomerization method. The geometrically constrained conditions result in variable motion branches of the mechanism. Based on the singular value decomposition of the Jacobian matrix, the motion branches and branch bifurcation characteristics are analyzed, and the schematics of bifurcations in joint space is derived. This novel 6R linkage features one Goldberg 6R motion branch, two line-symmetric Bricard 6R motion branches, and one Bennett motion branch. With regards to the line-symmetric Bricard 6R motion branches, a similar function for the disassembly and recombination process can be achieved by reconstructing an intermediate configuration through bifurcation. Then, the isomerized generalized variant Goldberg 6R linkage is explicated in a similar way. Acting as a bridge, reconfigurability connects two families of overconstrained mechanisms.

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