Origami-Enhanced Mechanical Properties for Worm-Like Robot.

Soft robotics Pub Date : 2025-02-01 Epub Date: 2024-07-04 DOI:10.1089/soro.2023.0246
Zuolin Liu, Zihan He, Xiao Hu, Zitao Sun, Qi Ge, Jian Xu, Hongbin Fang
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Abstract

In recent years, the exploration of worm-like robots has garnered much attention for their adaptability in confined environments. However, current designs face challenges in fully utilizing the mechanical properties of structures/materials to replicate the superior performance of real worms. In this article, we propose an approach to address this limitation based on the stacked Miura origami structure, achieving the seamless integration of structural design, mechanical properties, and robotic functionalities, that is, the mechanical properties originate from the geometric design of the origami structure and at the same time serve the locomotion capability of the robot. Three major advantages of our design are: the implementation of origami technology facilitates a more accessible and convenient fabrication process for segmented robotic skin with periodicity and flexibility, as well as robotic bristles with anchoring effect; the utilization of the Poisson's ratio effect for deformation amplification; and the incorporation of localized folding motion for continuous peristaltic locomotion. Utilizing the high geometric designability inherent in origami, our robot demonstrates customizable morphing and quantifiable mechanical properties. Based on the origami worm-like robot prototype, we experimentally verified the effectiveness of the proposed design in realizing the deformation amplification effect and localized folding motion. By comparing this to a conventional worm-like robot with discontinuous deformation, we highlight the merits of these mechanical properties in enhancing the robot's mobility. To sum up, this article showcases a bottom-up approach to robot development, including geometric design, mechanical characterization, and functionality realization, presenting a unique perspective for advancing the development of bioinspired soft robots.

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蠕虫机器人的折纸增强机械特性
近年来,对蠕虫机器人的探索因其在狭窄环境中的适应性而备受关注。然而,目前的设计在充分利用结构/材料的机械特性来复制真实蠕虫的卓越性能方面面临挑战。在本文中,我们提出了一种基于堆叠三浦折纸结构的方法来解决这一限制,实现了结构设计、机械性能和机器人功能的无缝整合,即机械性能源于折纸结构的几何设计,同时又服务于机器人的运动能力。我们的设计有三大优势:折纸技术的应用使具有周期性和灵活性的分段式机器人皮肤以及具有锚定效果的机器人刷毛的制作过程更加简便易行;利用泊松比效应放大变形;以及结合局部折叠运动实现连续蠕动运动。利用折纸固有的高几何可设计性,我们的机器人展示了可定制的变形和可量化的机械特性。在折纸蠕虫机器人原型的基础上,我们通过实验验证了拟议设计在实现变形放大效应和局部折叠运动方面的有效性。通过与具有不连续变形的传统蠕虫机器人进行比较,我们强调了这些机械特性在增强机器人机动性方面的优点。总之,本文展示了一种自下而上的机器人开发方法,包括几何设计、机械特性分析和功能实现,为推动生物启发软机器人的开发提供了一个独特的视角。
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