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采用多层波纹管式软气动执行器的软-硬混合旋转和棱柱关节:设计、特性及其作为软-硬混合夹具的应用。

Soft-Rigid Hybrid Revolute and Prismatic Joints Using Multilayered Bellow-Type Soft Pneumatic Actuators: Design, Characterization, and Its Application as Soft-Rigid Hybrid Gripper.

作者信息

Lee Peter Seungjune, Sjaarda Cameron, Gao Run Ze, Dupuis Jacob, Rukavina-Nolsoe Maya, Ren Carolyn L

机构信息

Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, Canada.

出版信息

Soft Robot. 2025 Apr;12(2):183-199. doi: 10.1089/soro.2022.0214. Epub 2024 Sep 20.

Abstract

Despite the exponentially expanding capabilities of robotic systems with the introduction of soft robotics, the lack of practical considerations in designing and integrating soft robotic components hinders the widespread application of newly developed technology in real life. This study investigates the development and performance evaluation of soft-rigid hybrid (SRH) robotic systems employing multilayered bellow-shaped soft pneumatic actuators (MBSPAs) to overcome the common challenges exclusively exhibited in soft robotics. Specifically, we introduce a unique SRH revolute joint enabled by a single thermoplastic polyurethane-MBSPA and rigid components to tackle the limitations of existing soft pneumatic actuators (SPAs), such as restricted payload capacity, vulnerability to external damages, and lack of resilience against outdoor environment. The proposed SRH system entails rigid components encapsulating to protect the MBSPA throughout the entirety of the desired range of motion, and demonstrates improved displacement efficiency, force output, and resilience against external loads. The rigid components also help to stabilize the axis of motion, fostering high durability and repeatable motion. We also extend this concept to a one-degree of freedom SRH prismatic joint. Finite element method modeling is used to estimate the general actuator performance, facilitating the design of MBSPA with limited material information and bypassing trial and error. The wider application of this research targets delicate object handling in industries such as agriculture, encouraging safe and efficient automated harvesting. The article includes thorough actuator performance characterization including displacement, frequency response, durability with life cycle testing up to 25,000 cycles, force output, stiffness, and power density. Performance comparisons with other SPA are provided. A proof of concept 3-point gripper enabled by the proposed SRH joints is capable of gripping objects of various sizes and shapes, with detailed workspace analysis and demonstration showing the gripper's versatility. The SRH system presented here lays a robust foundation for the ongoing advancement of soft robotic technology toward real-life applications, unveiling the potential for a future in which robots operate efficiently in the targeted applications, aiming to integrate seamlessly into workflows with human workers.

摘要

尽管随着软机器人技术的引入,机器人系统的能力呈指数级增长,但在设计和集成软机器人组件时缺乏实际考虑因素,阻碍了新开发技术在现实生活中的广泛应用。本研究旨在探讨采用多层波纹管形软气动执行器(MBSPA)的软硬混合(SRH)机器人系统的开发和性能评估,以克服软机器人技术中独有的常见挑战。具体而言,我们引入了一种独特的SRH旋转关节,该关节由单个热塑性聚氨酯-MBSPA和刚性部件组成,以解决现有软气动执行器(SPA)的局限性,如有限的负载能力、易受外部损坏以及缺乏对户外环境的适应性。所提出的SRH系统包括刚性部件,这些部件在整个所需的运动范围内对MBSPA进行封装保护,并展示出更高的位移效率、力输出以及对外部负载的适应性。刚性部件还有助于稳定运动轴,提高耐用性和运动的可重复性。我们还将这一概念扩展到了单自由度SRH棱柱关节。有限元方法建模用于估计一般执行器的性能,有助于在材料信息有限的情况下设计MBSPA,避免反复试验。这项研究的更广泛应用目标是农业等行业中的精细物体处理,鼓励安全、高效的自动收获。文章包括对执行器性能的全面表征,包括位移、频率响应、高达25000次循环的生命周期耐久性测试、力输出、刚度和功率密度。还提供了与其他SPA的性能比较。由所提出的SRH关节实现的概念验证三点式夹具能够抓取各种尺寸和形状的物体,详细的工作空间分析和演示展示了该夹具的多功能性。本文提出的SRH系统为软机器人技术向实际应用的持续发展奠定了坚实基础,揭示了机器人在目标应用中高效运行的未来潜力,旨在与人类工人无缝集成到工作流程中。

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