Ejection Seat Harness Comparison Study: +Gz Manikin Analysis

摘要

1. Data indicated the LOIS manikin generated greater relative response with heavy helmet compared to baseline helmet than LARD a. Shoulder load, head and chest acceleration b. Largest Nij values, but still less than AFRL Nij limit of 0.56 2. Data indicated similar responses between torso and seat harness for both LOIS and LARD a. Little difference In measured accelerations and loads/torques; shoulder load the exception with LARD at 10 - 15 G impacts; All Nij values less than AFRL Nij limit of 0.56 b. Seat harness allowed greater forward motion with LARD compared to torso harness 3. Data indicated similar responses between simulated seat configuration for LOIS, but slightly greater for LARD a. LARD had greater shoulder loads and head Ry acceleration, increased forward motion with JSF-style seat configuration b. LOIS generated greatest Nij values for JSF-style seat, but still less than AFRL Nij limit of 0.56; also had increased forward motion compared to baseline 4. Overall a. Headrest had little effect, Heavy helmet generated greatest relative differences, Harness had effect with LARD (noted LARD motion response) b. Combined configurations indicated JSF-style seat had increased forward torso motion.