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Estimation of Occupant Position from Probability Manifolds of Air Bag Fire-times
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English
Abstract
This paper outlines a method for estimating the probablistic nature of airbag crash sensor response and its effect on occupant position. Probability surfaces of airbag fire times are constructed for the impact velocities from 0 to 40 mph. These probability surfaces are obtained by using both frontal offset deformable barrier and frontal rigid barrier crash data. Another probability surface of displacement is constructed to estimate the occupant displacement time history before airbag deployment. This probability surface is constructed by using the initial occupant seating position data and the vehicle impact velocity and deceleration data. In addition, the probability of airbag firing at a given crash velocity is estimated from NASS-CDS, frontal offset and rigid barrier crash data. Finally, a calculus is constructed to estimate the effects of different: fire/no-fire probability, occupant position when the airbag fires, and the number of occupants in contact with the airbag module when it fires. However, it should be mentioned that all work presented in this paper is preliminary and may be modified in the future. The purpose of this paper is to outline the method used to estimate the probablistic nature of airbag fire times and then use the estimated firing times to model its effect on the occupant.
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Authors
Citation
Nusholtz, G., Xu, L., and Kostyniuk, G., "Estimation of Occupant Position from Probability Manifolds of Air Bag Fire-times," SAE Technical Paper 980643, 1998, https://doi.org/10.4271/980643.Also In
References
- Horsch J. Lou L. Andrzejak D. Viano D, Mervin J. etc. “Assessment of Air Bag Deployment Loads” SAE Paper 902324 1990
- Fleming W. J. “Short-Stature Subject Body-to-steering Wheel Distance Survey” Report from TRW Vehicle Safety Systems, Inc. July 1996
- Test Report from Transport Canada Safety and Security, Department of Research Engineering and Vehicle Testing 1996
- Hjerpe E. Linn G. Mosskull B. Jonsson H. Kahler G. “‘Out of Position’ at Sudden Braking” Report from the Institute for the Prevention of Personal Injury at Chalmers University of Technology Dec. 1993
- Malczyk A. Adomeit H. “The Airbag Folding Pattern as a Means for Injury Reduction of Out-of-Position Occupants” SAE Paper 952704 1995
- Spiess O. Marotzke T. Zahn M. “Development Methodology of an Airbag Integrated Steering Wheel in Order to Optimize Occupant Protection Balanced Against Out-of-Position Risks” SAE Paper 970777 1997
- Remeo D. J. “Mid-Atlantic Driver Air Bag” the 14th International Conference, Enhanced Safety of Vehicles (ESV) Munich Germany May 23-26 1994