Pneumatically Controlled Reconfigurable Bistable Bionic Flower for Robotic Gripper

双稳态 变形 仿生学 仿生学 软机器人 计算机科学 执行机构 人工智能 机器人 灵活性(工程) 机器人学 工程类 机械工程 材料科学 统计 光电子学 数学
作者
Zheng Zhang,Xiangqi Ni,Weiliang Gao,Hongcheng Shen,Min Sun,Guodong Guo,Huaping Wu,Shaofei Jiang
出处
期刊:Soft robotics [Mary Ann Liebert]
卷期号:9 (4): 657-668 被引量:26
标识
DOI:10.1089/soro.2020.0200
摘要

Beyond their colorful appearances and versatile geometries, flowers can self-shape-morph by adapting to environmental changes. Nature-inspired artificial systems that mimic their natural counterparts in function, flexibility, and adaptation find an emerging application in mobile robotics. In this study, a novel reconfigurable bionic flower made of petal-shaped bistable carbon fiber-reinforced composites and actuated by soft pneumatic actuators is presented. A robotic gripper based on the bionic flower was then developed for transportation tasks. First, a bionic petal based on a hybridization of bistable composites was designed and a theoretical model was established to analyze its bistable characteristic. Second, experiments and simulations were performed to analyze the out-of-plane deformation and morphing processes of the bionic petal. Curvature analysis of the closing state and blooming state shows a good match with the theoretical results. Finally, a flower-inspired robotic gripper made of the bionic petal is demonstrated to evaluate its gripping performances, including gripping force, response time, and reliability. The functional tests confirmed that the proposed soft gripper can grip objects of various shapes, sizes, and weights within milliseconds response time. The stable gripping configuration was maintained through the bistability of the bionic petal without continuous pressure consumption. The high reliability of the gripper is very useful for gripping tasks under unstructured environments, where precise control over the robot is not possible.
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