Robotic Fiber Fabrication based on Solidification Force Control

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openAccess

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A4 Artikkeli konferenssijulkaisussa

Date

2022

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en

Pages

6

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Proceedings of MARSS 2022 - 5th International Conference on Manipulation, Automation, and Robotics at Small Scales

Abstract

In this paper, we propose a robotic fiber fabrication method based on solidification force control to achieve highly repeatable mechanical properties of fibers. Dextran material is used as the specimen in the experiments. It has been chosen because of its similar rheological behavior to silk protein at high mass concentrations. However, the viscosity of dextran material is very low at its liquid phase, so force control during fabrication is challenging. Here, we propose a novel approach that controls the mechanical properties of fiber by controlling the solidification force. We employ impedance control with force tracking to control the solidification force to carry out the threading experiments and examine the benefits of the proposed approach. The repeatability of the mechanical properties of the fabricated fibers has been studied and compared using three scenarios a) fiber fabrication without solidification force control, abbreviated as FFNC, b) fiber fabrication with solidification force control after 60 seconds of solidification from the beginning of the solidification force detection abbreviated as FFWC, and c) fiber fabrication with solidification force control immediately after the detection of the solidification force, abbreviated as FFSC. The experimental results show that fibers fabricated using FFSC scenario have the highest repeatability based on the coefficient of variation of properties of the fabricated fibers, where the obtained coefficient of variation of the toughness, stiffness, elongation, and strength are 12.8%, 13.6%, 14.8%, 12.7% respectively. The experimental results also showed that fibers' mechanical properties toughness, stiffness, elongation, and strength have a negative correlation with the fabrication pulling velocity.

Description

Funding Information: *Research supported by Academy of Finland Project 317018. The authors are with the Department of Electrical Engineering and Automation, School of Electrical Engineering, Aalto University, 02150 Espoo, Finland. Email Publisher Copyright: © 2022 IEEE.

Keywords

artificial fiber threading, bio-mimicking, force control, impedance control, robotics and automation

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Citation

Bettahar, H, Valisalmi, T, Linder, M & Zhou, Q 2022, Robotic Fiber Fabrication based on Solidification Force Control . in S Haliyo, M Boudaoud, E Diller, X Liu, Y Sun & S Fatikow (eds), Proceedings of MARSS 2022 - 5th International Conference on Manipulation, Automation, and Robotics at Small Scales . Proceedings of MARSS 2022 - 5th International Conference on Manipulation, Automation, and Robotics at Small Scales, IEEE, International Conference on Manipulation, Automation and Robotics at Small Scales, Toronto, Canada, 25/07/2022 . https://doi.org/10.1109/MARSS55884.2022.9870490