This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Optimum Restraint Parameters for Bounded Occupant Motion in Decelerating Vehicles
Annotation ability available
Sector:
Event:
Mid-Year Meeting
Language:
English
Abstract
The problem of occupant impact severity reduction by effective use of available space was studied using a two-degree-of-freedom linear mathematical model implemented on a digital computer. An optimum-search method was employed to find the best values of stiffness and damping terms for linear lap and shoulder “belts” corresponding to specific vehicle pulseforms and geometry at speeds 10 to 60 mph. System performance was evaluated on the basis of a severity index comparing occupant deceleration data, and upon penalties imposed for occupant contact with vehicle interior structures. Comparison to biomechanical data indicates that the optimal linear system for 60 mph could produce serious injuries. Comparison to theoretical optimum values indicates considerable room for improvement, using active or nonlinear passive systems.
Recommended Content
Authors
Citation
Free, J., Warner, C., and Hoyt, T., "Optimum Restraint Parameters for Bounded Occupant Motion in Decelerating Vehicles," SAE Technical Paper 700450, 1970, https://doi.org/10.4271/700450.Also In
References
- Huelke D. F. Chewning W. A. “Comparison of Occupant Injuries With and Without Seat Belts.” Paper 690244 presented at SAE Automotive Engineering Congress Detroit January 1969
- Bohlin N. I. “A Statistical Analysis of 28,000 Accident Cases with Emphasis on Occupant Restraint Value.” Conference Proc., Eleventh Stapp Car Crash Conference Anaheim 1967 299 308
- “Accident Facts,” 1968 National Safety Council Chicago, Ill. 53
- Siegel A. W. Van Wagoner W. T. Nahum A. M. “Case Comparisons of Restrained and Nonrestrained Occupants and Related Injury Patterns.” Paper 690245 presented at SAE Automotive Engineering Congress Detroit January 1969
- Patrick L. M. “Projected Evolution of Restraint Systems.” Paper 690250 presented at SAE International Automotive Engineering Congress Detroit January 1969
- Nachbar W. Schipmolder J. B. “Optimization of a Viscoelastic Structure: The Seat-Belt Problem.” ASME Applied Mechanics Division, Western Conference Albuquerque August 1969 Paper No. 69-APMW-25
- Renneker D. N. “A Basic Study of Energy-Absorbing Vehicle Structure and Occupant Restraints by Mathematical Model.” Automotive Safety Dynamic Modeling Symposium Anaheim 1967
- Kaufman H. Larson D. B. “Calculation of Deceleration Waveforms Using Optimal Control Theory.” First International Conference, Vehicle Mechanics Detroit 1967 Sachs H. K.
- Thompson J. E. “Occupant Response Versus Vehicle Crush: A Total System Approach.” Twelfth Stapp Car Crash Conference Detroit October 1968 220 239
- Roberts V. L. Robbins D. H. “Multidimensional Mathematical Modeling of Occupant Dynamics Under Crash Conditions.” Paper 690248 presented at SAE Automotive Engineering Congress Detroit January 1969
- “Bioastronautics Data Book.” National Aeronautics and Space Administration Washington, D. C 1964 245 271
- Martin D. E. Kroell C. K. “Vehicle Crush and Occupant Behavior.” Paper 670034 presented at SAE Automotive Engineering Congress Detroit January 1967
- Armstrong R. W. Waters H. P. Stapp J. P. “Human Muscular Restraint During Sled Deceleration.” Twelfth Stapp Car Crash Conference Detroit 1968 440 462
- Aldman B. Asberg A. “Impact Amplification in European Compacts.” Twelfth Stapp Car Crash Conference Detroit 1968 387 401
- Snyder R. G. “A Survey of Automotive Occupant Restraint Systems: Where We've Been, Where We Are, and Our Current Problems.” Paper 690243 presented at SAE Automotive Engineering Congress Detroit January 1969
- Eiband A. M. “Human Tolerance to Rapidly Applied Accelerations: A Summary of the Literature.” National Aeronautics and Space Administration Memorandum 5-19-59E Washington June 1959
- Automotive Safety Committee of SAE Automotive Council “Survey of Research Projects on Human Tolerances to Impact Forces.” New York 1968
- Stapp J. P. “Human Criteria for Protection from Vehicle Crash Impact.” Paper 690104 presented at SAE Automotive Engineering Congress Detroit January 1969
- Severy D. M. Brink H. M. Baird J. D. “Passenger Protection from Front-Eng Impacts.” Paper 690068 presented at Automotive Engineering Congress Detroit January 1969
- Armstrong R. W. Waters H. P. “Testing Programs and Research on Restraint Systems.” Paper 690247 presented at Automotive Engineering Congress Detroit January 1969
- Gadd C.W. “Use of a Weighted-Impulse Criterion for Estimating Injury Hazard.” Tenth Stapp Car Crash Conference, Holloman AFB 1966 164 174
- Turnbow J. W. Carroll D. F. Haley, J. L. Jr. Robertson S. H. “Crash Survival Design Guide.” U. S. Army Aviation Material Laboratories Fort Eustis, Va. 1969
- Emori R. I. “Analytical Approach to Automobile Collisions.” Paper 680016 presented at SAE Engineering Congress Detroit January 1968
- Patrick L. M. Mertz, H. J. Jr. Kroell C. K. “Impact Dynamics of Unrestrained, Lap Belted, and Lap and Diagonal Chest Belted Vehicle Occupants.” Tenth Stapp Car Crash Conference Proceedings New York Society of Automotive Engineers, Inc 1966
- Fletcher R. D. Powell M. D. “A Rapidly Convergent Descent Method For Minimization.” Computer Journal 6 July 1963 163 168
- Paynter H. M. Suez J. “Automatic Digital Setup and Scaling of Analog Computers.” ISA Transactions Plenum Press 3 1 January 1964
- Liou M. L. “A Novel Method of Evaluating Transient Response.” Proceedings of the IEEE 54 1 January 1966 20 23