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Branch Identification of Spherical Six-Bar Linkages

[+] Author Affiliations
Liangyi Nie, Jun Wang, Daxing Zhao, Quan Wang, Jun Ren, Jinfeng Sun

Hubei University of Technology, Wuhan, Hubei, China

Kwun-Lon Ting

Tennessee Technological University, Cookeville, TN

Paper No. DETC2016-59018, pp. V05BT07A072; 7 pages
  • ASME 2016 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 5B: 40th Mechanisms and Robotics Conference
  • Charlotte, North Carolina, USA, August 21–24, 2016
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-5016-9
  • Copyright © 2016 by ASME


Branch (assembly mode or circuit) identification is a way to assure motion continuity among discrete linkage positions. Branch problem is the most fundamental, pivotal, and complex issue among the mobility problems that may also include sub-branch (singularity-free) identification, range of motion, and order of motion. Branch and mobility complexity increases greatly in spherical or spatial linkages. This paper presents the branch identification method suitable for automated motion continuity rectification of a single degree-of-freedom of spherical linkages. Using discriminant method and the concept of joint rotation space (JRS), the branch of a spherical linkage can be easily identified. The proposed method is general and conceptually straightforward. It can be applied for all linkage inversions. Examples are employed to illustrate the proposed method.

Copyright © 2016 by ASME
Topics: Linkages



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