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Technical Paper

Assessing Biofidelity of the Test Device for Human Occupant Restraint (THOR) Against Historic Human Volunteer Data

2013-11-11
2013-22-0018
The National Aeronautics and Space Administration (NASA) is interested in characterizing the responses of THOR (test device for human occupant restraint) anthropometric test device (ATD) to representative loading acceleration pulse s. Test conditions were selected both for their applicability to anticipated NASA landing scenarios, and for comparison to human volunteer data previously collected by the United States Air Force (USAF). THOR impact testing was conducted in the fore-to-aft frontal (-x) and in the upward spinal (-z) directions with peak sled accelerations ranging from 8 to 12 G and rise times of 40, 70, and 100ms. Each test condition was paired with historical huma n data sets under similar test conditions that were also conducted on the Horizontal Impulse Accelerator (HIA). A correlation score was calculated for each THOR to human comparison using CORA (CORrelation and Analysis) software.
Technical Paper

Development of Head Injury Assessment Reference Values Based on NASA Injury Modeling

2011-11-07
2011-22-0003
NASA is developing a new crewed vehicle and desires a lower risk of injury compared to automotive or commercial aviation. Through an agreement with the National Association of Stock Car Auto Racing, Inc. (NASCAR®), an analysis of NASCAR impacts was performed to develop new injury assessment reference values (IARV) that may be more relevant to NASA's context of vehicle landing operations. Head IARVs associated with race car impacts were investigated by analyzing all NASCAR recorded impact data for the 2002-2008 race seasons. From the 4015 impact files, 274 impacts were selected for numerical simulation using a custom NASCAR restraint system and Hybrid III 50th percentile male Finite Element Model (FEM) in LS-DYNA. Head injury occurred in 27 of the 274 selected impacts, and all of the head injuries were mild concussions with or without brief loss of consciousness. The 247 noninjury impacts selected were representative of the range of crash dynamics present in the total set of impacts.
Technical Paper

Desert Research and Technology Studies 2008 Report

2009-07-12
2009-01-2563
The National Aeronautics and Space Administration (NASA) Johnson Space Center (JSC) Advanced Extravehicular Activity (AEVA) Team, during the last two weeks of October 2008, led the field test portion of the 2008 Desert Research and Technology Studies (D-RATS) near Flagstaff, AZ. The D-RATS field test activity is the year-long culmination of the technology and operations development efforts of various individual science and advanced engineering discipline areas into a coordinated field test demonstration under representative (analog) planetary surface terrain conditions. The 2008 D-RATS, which was the eleventh RATS field test, was the most focused and successful test to date. It hosted participants from six NASA field centers, three research organizations, one university, and one other government agency.
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