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Active Reconfigurable Tristable Square-Twist Origami

机译：有源可重构三稳方扭折纸

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摘要

Origami structures offer valuable applications in many fields, ranging from metamaterials to robotics. The multistable characteristics of origami structures have been pursued for acquiring unique reconfigurable features. For achieving this goal, an unusual polymeric tristable origami structure is demonstrated using a classic square-twist origami configuration. By manipulating both material properties and geometric parameters of the heteropolymer structures, a design principle for tailoring the multistable configuration in the square-twist origami is established based on variation of the structural potential energy. Under thermal triggering, the stiffness of the deformable structure is dramatically reduced, which causes an increase in the structural degree of freedom, allowing for self-deployment via release of the prestored energy in the elastic twisted hinges. Utilizing such unique features and design principles, a prototype of frequency reconfigurable origami antenna of five diverse operating modes and a programmable multiple-input multiple-output communication system is subsequently designed and assembled, aiming to substantially promote the channel capacity and communication reliability. The findings and results firmly provide a remarkable design principle and strategy for advancing active origami structures and devices in shape-morphing systems.
机译：折纸结构在从超材料到机器人的许多领域提供了有价值的应用。为了获得独特的可重构特征，一直追求折纸结构的多稳态特性。为了实现这一目标，使用经典的方形扭曲折纸结构展示了一种不寻常的聚合物三稳态折纸结构。通过操纵杂聚物结构的材料特性和几何参数，基于结构势能的变化，建立了一种用于在方形扭曲折纸中定制多稳态构型的设计原理。在热触发下，可变形结构的刚度大大降低，这导致结构的自由度增加，从而允许通过释放弹性扭曲铰链中的预存能量来进行自我部署。利用这种独特的特征和设计原理，随后设计并组装了具有五种不同工作模式的频率可重构折纸天线的原型以及可编程的多输入多输出通信系统，旨在大幅提高信道容量和通信可靠性。这些发现和结果坚定地为推进形状变形系统中的主动折纸结构和装置提供了卓越的设计原理和策略。

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