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Effectiveness of Real-Time Control for Active Restraint Systems in Frontal Crashes
Published November 29, 2004 by Fraunhofer Institut Chemische Technologie in Germany
Event: Airbag 2004
Modern restraints systems act in a passive way whilst providing occupant protection across a range of crash and restraint conditions. An increasing number of measurements are available to determine the most appropriate deployment logic for a given crash scenario. Once the deployment logic decision is made, the settings of the restraint system components are fixed throughout the duration of the crash. In most cases, restraint system components are developed around legislated high-speed barrier impact conditions that focus on the reduction of AIS 3+ injury levels (threat to life).
In this paper, the effectiveness of real-time controlled restraint systems is discussed. Such systems, also called active restraint systems, are manipulated throughout the duration of the crash event, based on measurements of the occupant response. This requires a new family of restraint system components, actuators, sensors and control algorithms. This paper quantifies the benefits of such an approach using numerical simulations with MADYMO and MATLAB software.