In this paper, a class of large deployable mechanisms constructed by plane-symmetric Bricard linkages is presented. The plane-symmetric Bricard linkage is a closed-loop overconstrained spatial mechanism composed of six hinge-jointed bars, which has one plane of symmetry during its deployment process. The kinematic analysis of the linkage is presented from the perspectives of geometric conditions, closure equations, and degree-of-freedom. The results illustrate that the linkage has one degree-of-freedom and can be deployed from the folded configuration to one rectangle plane. Therefore, the plane-symmetric Bricard linkage can be used as a basic deployable unit to construct larger deployable mechanisms. Four plane-symmetric Bricard linkages can be assembled into a quadrangular module by sharing the vertical bars of the adjacent units. The module is a multiloop deployable mechanism and has one degree-of-freedom. The singularity analysis of the module is developed, and two methods to avoid singularity are presented. A large deployable mast, deployable plane truss, and deployable ring are built with several plane-symmetric Bricard linkages. The deployment properties of the large deployable mechanisms are analyzed, and computer-aided design models for typical examples are built to illustrate their feasibility and validate the analysis and design methods.
Design and Mobility Analysis of Large Deployable Mechanisms Based on Plane-Symmetric Bricard Linkage
Contributed by the Mechanisms and Robotics Committee of ASME for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received July 1, 2016; final manuscript received October 13, 2016; published online November 14, 2016. Assoc. Editor: Massimo Callegari.
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Qi, X., Huang, H., Miao, Z., Li, B., and Deng, Z. (November 14, 2016). "Design and Mobility Analysis of Large Deployable Mechanisms Based on Plane-Symmetric Bricard Linkage." ASME. J. Mech. Des. February 2017; 139(2): 022302. https://doi.org/10.1115/1.4035003
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