Design and Control of Reduced Power Actuation for Active-Contracting Orthostatic Intolerance Garments
dc.creator | Granberry, Rachael | |
dc.creator | Padula, Santo | |
dc.creator | Eschen, Kevin | |
dc.creator | Abel, Julianna | |
dc.creator | Holschuh, Brad | |
dc.date.accessioned | 2019-06-26T14:10:13Z | |
dc.date.available | 2019-06-26T14:10:13Z | |
dc.date.issued | 2019-07-07 | |
dc.description | Rachael Granberry, University of Minnesota, USA | |
dc.description | Santo Padula, National Aeronautics and Space Administration (NASA), USA | |
dc.description | Kevin Eschen, University of Minnesota, USA | |
dc.description | Julianna Abel, University of Minnesota, USA | |
dc.description | Brad Holschuh, University of Minnesota, USA | |
dc.description | ICES400: Extravehicular Activity: Space Suits | |
dc.description | The 49th International Conference on Environmental Systems as held in Boston, Massachusetts, USA on 07 July 2019 through 11 July 2019. | |
dc.description.abstract | Active-contracting fabrics are a developing innovation that could revolutionize compression garment technology, notably aerospace orthostatic intolerance garments (OIG), by contracting on demand. Traditional fabric structures exhibit surface-wide distributed and/or functionally graded contractile actuation through the integration of materials with shape memory (SM) properties. Prior research has found that active-contracting fabrics, specifically weft knit garter fabric architectures constructed with shape memory alloy (SMA) filaments, can apply 8-30 mmHg on the body (single-layer construction) or 15-65 mmHg (double layer construction), depending on body radius (i.e. average ankle girth, SizeUSA women; average torso girth, SizeUSA men). Prior garment prototyping and performance validation efforts have been conducted with commercially available Flexinol wire with an actuation finish temperature of 90°C, a temperature that is not appropriate proximal to the human body. While other chemistries of SMA having lower actuation temperatures commonly used for medical devices inside the human body (T ≈ 37°C) are available, SMA material is currently not designed specifically for actuation control against the human skin (T ≈ 31°C). This research characterizes and validates a novel SMA material designed in collaboration with Fort Wayne Metals specifically for actuation adjacent to the surface of the body. Through traditional SMA material testing paired with experimental temperature-force-displacement testing, we present data validating material functionality in the design of a future OIG. The manuscript presents evidence for a future OIG that is donned in an oversized and compliant state, heated momentarily above ambient skin temperature to initiate actuation, and remains actuated post-applied heat indefinitely. The result is an OIG that requires almost no operating power that could be doffed through zipper releases and placed in a sub-zero chamber to return to the “off” state before reuse. Preliminary findings will be presented to characterize the performance of the material in future aerospace compression systems. | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | application/pdf | |
dc.identifier.other | ICES_2019_44 | |
dc.identifier.uri | https://hdl.handle.net/2346/84728 | |
dc.language.iso | eng | |
dc.publisher | 49th International Conference on Environmental Systems | |
dc.subject | compression garments | |
dc.subject | orthostatic intolerance garments | |
dc.subject | contracting fabrics | |
dc.subject | robotic fabrics | |
dc.subject | shape memory alloys | |
dc.subject | shape memory effect | |
dc.subject | functional clothing | |
dc.title | Design and Control of Reduced Power Actuation for Active-Contracting Orthostatic Intolerance Garments | en_US |
dc.type | Presentations |