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Virginia Tech

1. Hanyok, Lauren Watson. Methods for Calculating Motion Induced Interruptions as Applied to a Space Capsule After Splashdown.

Degree: MS, Aerospace and Ocean Engineering, 2013, Virginia Tech

The introduction of calculation methods for motion induced interruptions (MII) in 1984 introduced a new way to quantify human factors in addition to the motion sickness index (MSI). The 1990 Graham method for calculating MII uses a combination of a vessel\'s acceleration and roll to determine a tipping" factor to calculate MII per minute. The Applebee-Baitis (AB) method considered that the motions are implicitly considered in accelerations, and therefore did not require roll to calculate MII. This thesis examines and analyzes the di"erences between the AB and Graham methods and compares their results for a unique hull form shape, a cylindrical capsule, in rough seas to determine which method is preferred. Two tests were performed by the Naval Surface Warfare Center, Carderock Division (NSWCCD) for the National Aeronautics and Space Administration (NASA) on the Orion Crew Exploration Vehicle (CEV) in post-splashdown conditions. A one-quarter scale model of the CEV was tested at the Aberdeen Test Center in Aberdeen, Maryland. Direct comparison of the analyzed data, MII sensitivity to location, and scaling analyses are examined and future work to further the application of MII calculation methods are proposed. The symmetry of the capsule leads to the assumption that roll and pitch-dominant MII calculations should be on the same order of magnitude. They are not because both MII methods only take roll-motions into account. The inclusion of both pitch and roll motions for the MII calculations is proposed as future work. The Graham method was found to be the more appropriate calculation because it is more conservative, and therefore preferred in the context of crew safety. Advisors/Committee Members: McCue-Weil, Leigh S. (committeechair), Belknap, William Forrest (committee member), Brown, Alan J. (committee member).

Subjects/Keywords: motion induced interruptions; unique hull form; space capsule; accelerations; human factors

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Hanyok, L. W. (2013). Methods for Calculating Motion Induced Interruptions as Applied to a Space Capsule After Splashdown. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/19252

Chicago Manual of Style (16th Edition):

Hanyok, Lauren Watson. “Methods for Calculating Motion Induced Interruptions as Applied to a Space Capsule After Splashdown.” 2013. Masters Thesis, Virginia Tech. Accessed December 10, 2019. http://hdl.handle.net/10919/19252.

MLA Handbook (7th Edition):

Hanyok, Lauren Watson. “Methods for Calculating Motion Induced Interruptions as Applied to a Space Capsule After Splashdown.” 2013. Web. 10 Dec 2019.

Vancouver:

Hanyok LW. Methods for Calculating Motion Induced Interruptions as Applied to a Space Capsule After Splashdown. [Internet] [Masters thesis]. Virginia Tech; 2013. [cited 2019 Dec 10]. Available from: http://hdl.handle.net/10919/19252.

Council of Science Editors:

Hanyok LW. Methods for Calculating Motion Induced Interruptions as Applied to a Space Capsule After Splashdown. [Masters Thesis]. Virginia Tech; 2013. Available from: http://hdl.handle.net/10919/19252

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