Large‐Scale Surface Shape Sensing with Learning‐Based Computational Mechanics

Advanced Intelligent Systems

Kenneth K. Y. Wong¹  Justin D. L. Ho²  Kui Wang²  Chi‐Hin Mak²  Zhiyu Liu²  Kam‐Yim Sze²  Ka-Wai Kwok²  Yunhui Liu³  Toshio Fukuda⁴  Kaspar Althoefer⁵ 

[1] Department of Electrical and Electronic Engineering The University of Hong Kong Hong Kong P. R. China;Department of Mechanical Engineering The University of Hong Kong Hong Kong P. R. China;Department of Mechanical and Automation Engineering The Chinese University of Hong Kong Hong Kong P. R. China;Department of Micro-Nano Systems Engineering Nagoya University Nagoya 464‐8601 Japan;School of Electronic Engineering and Computer Science Queen Mary University of London London E1 4NS UK;

关键词: computational mechanics;    ensemble learning;    flexible sensors;    robotic proprioception;    surface shape sensing;   

DOI  :  10.1002/aisy.202100089

来源: DOAJ

【 摘 要 】

Proprioception, the ability to perceive one's own configuration and movement in space, enables organisms to safely and accurately interact with their environment and each other. The underlying sensory nerves that make this possible are highly dense and use sophisticated communication pathways to propagate signals from nerves in muscle, skin, and joints to the central nervous system wherein the organism can process and react to stimuli. In a step forward to realize robots with such perceptive capability, a flexible sensor framework that incorporates a novel modeling strategy, taking advantage of computational mechanics and machine learning, is proposed. The sensor framework on a large flexible sensor that transforms sparsely distributed strains into continuous surface is implemented. Finite element (FE) analysis is utilized to determine design parameters, while an FE model is built to enrich the morphological data used in the supervised training to achieve continuous surface reconstruction. A mapping between the local strain data and the enriched surface data is subsequently trained using ensemble learning. This hybrid approach enables real time, robust, and high‐order surface reconstruction. The sensing performance is evaluated in terms of accuracy, repeatability, and feasibility with numerous scenarios, which has not been demonstrated on such a large‐scale sensor before.

【 授权许可】

Unknown