Browsing by Author "Stephens, Chanel"
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Item Establishing Standardized Test Methods for Evaluating Space Suit Gloves(2023 International Conference on Environmental Systems, 2023-07-16) Jones, Robert; Abney, Morgan; Brady, Timothy; Rhodes, Richard; McFarland, Shane; Settles. Joe; Stephens, Chanel; Hoyle, Andrew; Funk, Andrew; Rodgers, Stephanie,The Artemis space suit glove environmental protection garment (EPG) will be the first line of protection used to shield the crewmember’s hands from the environments encountered during extravehicular activity (EVA). As the Artemis missions will include more extreme environments than those experienced on the International Space Station, development, verification, and validation of gloves poses three key challenges. First, there are no standardized tests defined to evaluate the durability of space suit gloves for the extreme lunar environments, particularly the permanently shadowed regions. Second, there is insufficient data on state-of-the-art glove performance in a lunar environment from which to compare new designs. Third, current ISS glove Thermal Micrometeoroid Garment (TMG) fabrics are unlikely to be sufficient to meet Lunar requirements. It is therefore necessary to define tests to evaluate if gloves can meet new, challenging requirements. This paper focuses on the development of a test procedure to characterize lunar EVA glove fabrics using ASTM standardized test methods and the design and validation of a new standardized test procedure for comparing abrasion resistance between fabrics in lunar-like conditions. The results of testing on twelve candidate EVA glove fabrics are presented.Item NASA Advanced Space Suit xEMU Development Report -- Waist Brief Hip(51st International Conference on Environmental Systems, 7/10/2022) Davis, Kristine; Grimes, Jaren; Stephens, ChanelFor the past several years, the Exploration Extra-Vehicular Mobility Unit (xEMU) team at NASA's Johnson Space Center has focused on the development and detailed design of the xEMU to support missions to the International Space Station (ISS) and a moon landing in 2024. In that context, this paper examines the development and baseline detailed design of the xEMU Waist Brief Hip (WBH). This paper will outline the challenging technical requirements, significant architectural trades, technical solutions required to overcome these challenges, and a current status of the detailed design. The preliminary results of Design Verification Testing (DVT) as it relates specifically to this hardware will also be provided, along with a forward strategy for final maturation into a flight-ready design.