Browsing by Author "Anderson, Samuel"
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Item Additive Manufacturing Fan Housings for the Universal Waste Management System Using the Electron-Beam Powder Bed Fusion Process(49th International Conference on Environmental Systems, 2019-07-07) Anderson, Samuel; Boysen, TimothyThe Universal Waste Management System (UWMS) is the next-generation space toilet destined for the International Space Station and the Orion Multi-purpose crew vehicle. The backbone of the UWMS system is the Dual Fan Separator, which serves the dual purpose of providing suction to gather urine from the user and capture waste gases from the commode. To maintain tight tolerances for smooth fan operation, the housings for the dual fan separator were designed to be two pieces. More traditional manufacturing methods, including investment casting, posed significant risk to meeting design tolerances and manufacturability. Working with the additive manufacturing group at Johnson Space Center and MSFC, Collins Aerospace and LAI International embarked on designing and building the housings using the electron beam powder bed fusion process. This paper details the development and qualification effort to prepare the housings for flight.Item Pulse-Modulated Oxygen Pressure Control for Extravehicular Activity Space Suits(50th International Conference on Environmental Systems, 7/12/2021) Barker, John; Baker, Bryce; Anderson, SamuelThis paper presents an adaptation of a pulse-modulated oxygen system for space suit pressure control. Pressure regulation and control for EVA spacesuits has been previously limited to 2-stage mechanical regulators. Mechanical regulators add significant weight to the Portable Life Support System that the astronaut must carry. To enable better mobility during surface operations, a more compact, lighter weight, adaptable solution is proposed. Taking from an emergency oxygen delivery system qualified on a commercial transport aircraft, the Oxygen and PSU Systems division of Collins Aerospace has developed and tested a new compact and lightweight EVA space suit pressure control system. The pressure regulation system utilizes timed pulses of pressurized oxygen to safely regulate the pressure within a space suit free volume under typical leakage and purge flow rates at space suit operational pressures. This paper covers the basic operation of the pressure regulation system as well as initial development test results and next steps.Item Urine Removal from Suited Crew in Orion Vehicle Depressurization Scenario(49th International Conference on Environmental Systems, 2019-07-07) Kaufman, Cory; Anderson, Samuel; Johnson, KirstynHumankind wants to continually venture deeper into space, but there are many hazards of deep space exploration. NASA’s Orion Program seeks to incrementally identify these hazards and begin addressing the difficulties of such long-duration missions. One of the largest risks and areas of focus in the program is crew survival in a vehicle cabin depressurization scenario. As part of proactive mitigation efforts, contingency operations and associated hardware are being developed to sustain crew members for up to 6 days. While the Orion launch and entry suit would provide the crew a pressurizable safe haven for that duration, additional systems are needed to handle crew waste management output for specific use with the suit. NASA’s Orion Crew Survival Systems and UTC Aerospace Systems are working together to develop and test an external suit system to aid in the evacuation of urine from their pressurized suit to ensure crew health and safety. This paper describes the recent and on-going design and testing that is driving hardware design towards eventual flight certification.