Type synthesis of two degrees-of-freedom rotational parallel mechanisms with a fixed center-of-rotation based on a graphic approach

K Wu, J.J. Yu, S.Z. Li, G.H. Zong, Xianwen Kong

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

Mechanisms usually have to be particularly designed to meet the high-performance requirements in terms of different applications. For instance, Two degrees of freedom (DOF) rotational parallel mechanisms (RPMs) with a fixed center-of-rotation can eliminate parasitic motion and could provide the rotary stage with excellent dynamic stability, good controllability and easy operation. Therefore, this paper mainly aims at synthesizing 2-DOF RPMs with fixed center-of-rotation, a class of special RPMs with potential excellent performances. A graphic approach based on freedom and constraint spaces is introduced firstly. The constraint spaces of a class of the existing 2-DOF RPMs are illustrated, and the corresponding type synthesis patterns are summarized by comparing the geometric properties of those spaces with the mechanism characteristic. After fully decomposing the four-dimensional constraint space into sub-constraint spaces, a general type synthesis procedure is proposed based on the freedom and constraint topology. Two novel 2-DOF RPMs with fixed center-of-rotation are constructed based on the proposed method and procedure. The proposed graphic approach proves to be effective and simple to synthesizing those parallel mechanisms with some special performance.
Original languageEnglish
Title of host publicationProceedings of ASME 2012 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference
Subtitle of host publicationChicago, Illinois, USA, August 12–15, 2012
PublisherAmerican Society of Mechanical Engineers
Pages647-658
Number of pages12
ISBN (Print)978-0-7918-4503-5
DOIs
Publication statusPublished - 12 Aug 2012

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    Wu, K., Yu, J. J., Li, S. Z., Zong, G. H., & Kong, X. (2012). Type synthesis of two degrees-of-freedom rotational parallel mechanisms with a fixed center-of-rotation based on a graphic approach. In Proceedings of ASME 2012 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference: Chicago, Illinois, USA, August 12–15, 2012 (pp. 647-658). American Society of Mechanical Engineers. https://doi.org/10.1115/DETC2012-71028