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Abstract
The next generation smart crashworthy crew seats will need to include design features that provide an enhanced level of crash safety while reducing the crew discomfort during long military missions. This paper presents the results from the Active Crash Protection Systems Enhancements II Program jointly funded by the U.S. Army Aviation Development Directorate – Aviation Applied Technology Directorate (ADD-AATD) and The Boeing Company under a Technology Investment Agreement. During this program a prototype crew seat design concept with actively-controlled seat energy absorbers was developed and integrated with an aircraft active crash protection system. The actively-controlled seat energy absorber technology developed enables automatic adjustment of the stroking load of the energy absorbers based on the occupant weight, available seat stroke, and the predicted crash impact conditions in order to provide an increased level of crash safety to the crew. The paper also includes results and recommendations from a crew seat ergonomic design study conducted to reduce crew discomfort during long missions.

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