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32. sj-pdf-1-trj-10.1177_00405175211060886 - Supplemental material for Development of the Auto-Fit Dial and its application to protective vests

Author

Ryu, Jaewook, Park, Sujin, Koo, Sumin Helen, and Lee, Giuk

Subjects
FOS: Materials engineering, 91299 Materials Engineering not elsewhere classified
Abstract

Supplemental material, sj-pdf-1-trj-10.1177_00405175211060886 for Development of the Auto-Fit Dial and its application to protective vests by Jaewook Ryu, Sujin Park, Sumin Helen Koo and Giuk Lee in Textile Research Journal

Published
2021
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34. Development of the Auto-Fit Dial and its application to protective vests.

Author

Ryu, Jaewook, Park, Sujin, Koo, Sumin Helen, and Lee, Giuk

Subjects
WIND power, WIRE netting, VESTS, STRUCTURAL stability, STRUCTURAL design
Abstract

This study proposes the Auto-Fit Dial, which is suitable for high-speed fitting; it includes a function that can wind wire at high speed using an energy storage–release mechanism. The Auto-Fit Dial can store energy in advance in the spiral spring via the rotation of the knob cover, and it releases the stored energy to wind the wire when required by pushing the knob cover. Firstly, the concept design and working principle of the Auto-Fit Dial are explained. Next, a detailed design and structural stability analysis of the mechanical components are described based on the design formula and finite-element analysis. An Auto-Fit Dial prototype is manufactured according to the detailed design with the weight, diameter, and height of 9.7 g, 30.5 mm, and 16.7 mm, respectively. The maximum number of rotations is 5.2 turns, which can wind a wire up to a length of 320 mm. The pulling force applied when the Auto-Fit Dial pulls the wire is initially measured as 5.10 N. The time required to wind a 320 mm wire is 0.015 s, which results in an average speed of 21.33 m/s. Moreover, the Auto-Fit Sleeve is fabricated and applied to the arm sleeve to verify the utility of the Auto-Fit Dial, which combines wire and fabric. Finally, the Auto-Fit Vest is developed by applying a protective vest to the Auto-Fit Dial. [ABSTRACT FROM AUTHOR]

Published
2022
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41. Reducing the metabolic rate of walking and running with a versatile, portable exosuit

Author

Kim, Jinsoo, primary, Lee, Giuk, additional, Heimgartner, Roman, additional, Arumukhom Revi, Dheepak, additional, Karavas, Nikos, additional, Nathanson, Danielle, additional, Galiana, Ignacio, additional, Eckert-Erdheim, Asa, additional, Murphy, Patrick, additional, Perry, David, additional, Menard, Nicolas, additional, Choe, Dabin Kim, additional, Malcolm, Philippe, additional, and Walsh, Conor J., additional

Published
2019
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43. Autonomous Multi-Joint Soft Exosuit for Assistance with Walking Overground

Author

Lee, Sangjun, primary, Karavas, Nikos, additional, Quinlivan, Brenna T., additional, LouiseRyan, Danielle, additional, Perry, David, additional, Eckert-Erdheim, Asa, additional, Murphy, Patrick, additional, Greenberg Goldy, Taylor, additional, Menard, Nicolas, additional, Athanassiu, Maria, additional, Kim, Jinsoo, additional, Lee, Giuk, additional, Galiana, Ignacio, additional, and Walsh, Conor J., additional

Published
2018
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50. Reducing the metabolic rate of walking and running with a versatile, portable exosuit.

Author

Jinsoo Kim, Lee, Giuk, Heimgartner, Roman, Revi, Dheepak Arumukhom, Karavas, Nikos, Nathanson, Danielle, Galiana, Ignacio, Eckert-Erdheim, Asa, Murphy, Patrick, Perry, David, Menard, Nicolas, Choe, Dabin Kim, Malcolm, Philippe, and Walsh, Conor J.

Subjects
*BIOMECHANICS, *WALKING, *RUNNING speed, *KINETIC energy, *FLEXOR muscles
Abstract

Walking and running have fundamentally different biomechanics, which makes developing devices that assist both gaits challenging. We show that a portable exosuit that assists hip extension can reduce the metabolic rate of treadmill walking at 1.5 meters per second by 9.3% and that of running at 2.5 meters per second by 4.0% compared with locomotion without the exosuit. These reduction magnitudes are comparable to the effects of taking off 7.4 and 5.7 kilograms during walking and running, respectively, and are in a range that has shown meaningful athletic performance changes. The exosuit automatically switches between actuation profiles for both gaits, on the basis of estimated potential energy fluctuations of the wearer’s center of mass. Single-participant experiments show that it is possible to reduce metabolic rates of different running speeds and uphill walking, further demonstrating the exosuit’s versatility. [ABSTRACT FROM AUTHOR]

Published
2019
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