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Dynamic Characterization of the Crew Module Uprighting System for NASA’s Orion Crew ModuleThe Orion Crew Module Uprighting System is a set of five airbag that are responsible for the uprighting of the crew module in the case of an inverted splashdown. A series of tests during the Underway Recovery Test 7 (URT-7) were run in preparation for the Artemis I mission, where the dynamic characterization of the CMUS in an ocean wave environment was performed. A Datawell Waverider DWR-G4 wave buoy was deployed to the characterize the wave environment during these tests. The heave measurements from this buoy were projected to the Orion Crew Module Buoyancy Test Article location by two different methods: (1) directly time-shifting the data, and (2) performing a frequency-domain, phase-shifting operation. Results demonstrate that the phase-shifting operation led to better correlation with the true crew module response to wave excitation as compared with the purely time-shifted method. Additionally, a novel approach to localize an object in a bidirectional wave field based on its heave response is presented and validated with URT- 7 data. Given a wave measurement device at a known location, one can estimate the relative distance to another object based solely off its heave response. Results show that if signals have sufficiently good correlation, this method can be used to estimate the relative separation between two objects in the same wave field.

Document ID
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Vertaska, Ivan Bertaska
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Van Zwieten, Tannen
(NASA Langley Research Center Hampton, VA, United States)
Mann, Jennifer
(Johns Hopkins Univ. Baltimore, MD, United States)
Connell, Benjamin
(Applied Phisical Sciences Groton, CT, United States)
Radke, Tara
(NASA Johnson Space Center Houston, TX, United States)
Bernatovich, Michael
(NASA Johnson Space Center Houston, TX, United States)
Date Acquired
April 20, 2020
Publication Date
October 27, 2019
Subject Category
Space Transportation And Safety
Report/Patent Number
Meeting Information
Meeting: OCEANS 2019 Seattle
Location: Seattle, WA
Country: United States
Start Date: October 27, 2019
End Date: October 31, 2019
Sponsors: Institute of Electrical and Electronics Engineers (IEEE)
Funding Number(s)
WBS: 869021.
Distribution Limits
Public Use Permitted.
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