A two-dimensional modular deployable truss structure with bistability
A two-dimensional modular deployable truss structure with bistability
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DOI：
10.1177/1045389x18810806
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发表时间：
2019-02-01
影响因子：
2.7
通讯作者：
Han, Jae-Hung
中科院分区：
文献类型：
--
作者：
Suh, Jong-Eun;Jeong, Suk-Yong;Han, Jae-Hung
本文提出了二维模块化可展桁架结构的新概念。为了消除额外的包容机制的需要，所提出的可展开结构被设计成具有可伸缩特性，使得它可以在收起和展开状态下保持鲁棒性。每个模块的展开由形状记忆合金的致动触发。建立了该可展开结构的静力学和动力学模型，分析了系统的特性和行为。根据设计参数分析了该结构的封装比。静态和包装效率分析结果表明，所提出的概念具有操作灵活性和高包装效率。基于动态模型的响应与实验模型的实际部署过程的比较来执行动态模型的验证;使用立体模式识别相机系统来捕获部署过程。结果表明，所建立的动力学模型可以准确地描述所提出的结构的部署行为。
In this article, a new concept of two-dimensional modular deployable truss structure is proposed. To eliminate additional needs of containment mechanism, the proposed deployable structure is designed to have bistable characteristics so that it can stay robust both in the stowed and deployed states. The deployment of each module is triggered by the actuation of shape memory alloys. Static and dynamic models of the proposed deployable structure are established to analyze the characteristics and behavior of the system. The packaging ratio of the proposed structure is analyzed in terms of the design parameters. The results of static and packaging efficiency analysis show that the proposed concept has operational flexibility and high packaging efficiency. Verification of the dynamic model is performed based on a comparison of the response of the dynamic model and the actual deployment process of an experimental model; the deployment process is captured using a stereo pattern recognition camera system. It is shown that the established dynamic model can accurately describe the deployment behavior of the proposed structure.