Abstract
Applications of the limiting performance analysis of biomechanical systems for optimal injury control are presented. A brief review of applications based on lumped-parameter injury models is given, which includes the problems of helmets with head injuries, seat belts with thoracic injuries, helicopter seat cushions with spinal injuries, toepan padding with lower limb injuries, and child seat sled test corridors with best and worst responses. Then, the problem of ejection seat cushions for the optimal control of spinal injuries is investigated. A rigid multi-body model is developed to describe the biodynamics of the entire system including the occupant. Peak lumbar load in the vertical direction is used as the safety performance index for ejection seat cushions and is minimized. Parametric optimization is performed on a particular cushion to find its optimal performance.
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