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Further Validation of EDCRASH Using the RICSAC Staged Collisions
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English
Abstract
The accuracy of the CRASH computer program was evaluated in terms of its ability to estimate impact speed. A comparison of the results from CRASH2, CRASH3 and EDCRASH were presented along with measured results from twelve staged collisions. Statistical analysis of these results revealed the impact speeds estimated by these CRASH programs were within −6 to +7 percent of the combined impact speeds at a 95 percent level of confidence. Using EDCRASH's extended features to optimize the input data improved the range to within −3 to +3 percent of combined impact speeds. An example was used to illustrate the use of the confidence intervals to estimate the expected range of impact speed for a given reconstruction. The results for oblique collisions were found to be significantly more accurate than the results for collinear collisions. Runs without the trajectory simulation were found to be significantly more accurate than runs with the trajectory simulation, although good steer angle data greatly improved the results. Accuracy for delta-V and separation velocity were not assessed because of errors in the measured (test) values.
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Citation
Day, T. and Hargens, R., "Further Validation of EDCRASH Using the RICSAC Staged Collisions," SAE Technical Paper 890740, 1989, https://doi.org/10.4271/890740.Also In
References
- McHenry, R.R. “Extensions and Refinements of the CRASH Computer Program Part II, User's Manual for the CRASH Computer,” February 1986
- Noga, T. Oppenheim, T. “CRASH3 User's Guide and Technical Manual,” Department of Transportation April 1982
- Day, T.D. Hargens, R.L. “EDCRASH Program Manual, Version 4,” Engineering Dynamics Corporation Lake Oswego, OR 1986
- McHenry, R.R. Lynch, J.P. Segal, D.J. “Research Input for Computer Simulation of Automobile Collisions - Volume I - Development of a Data Bank,” Calspan Corporation June 1977
- Shoemaker, N.E. “Research Input for Computer Simulation of Automobile Collisions - Volume II -Staged Collision Tests No. 1 Through No.5,” Calspan Corporation December 1978
- Shoemaker, N.E. “Research Input for Computer Simulation of Automobile Collisions - Volume III -Staged Collision Tests No. 6 Through No.12,” Calspan Corporation December 1978
- Jones, I.S. Baum, A.S. “Research Input for Computer Simulation of Automobile Collisions - Volume IV -Staged Collision Reconstructions,” Calspan Corporation December 1978
- Ricci, Leda L. “NCSS Statistics: Passenger Cars,” June 1980
- Fatal Accident Reporting System 1986 NHTSA March 1988
- National Accident Sampling System: Accident Investigation Procedures Manual NHTSA 1980
- “Standard Test Method for Measuring Skid Resistance of a Paved Surface Using a Full-scale Tire,” 4.03 American Society for Testing and Materials. Standard E-274-79 Philadelphia, PA 1979
- Personal correspondence from Dr. Russell A. Smith, who performed research on CRASH while on staff at NHTSA
- Oppenheim, T. “CRASH2 Maintenance Volume II: Listings of Test Runs,” Wilson Hill Associates May 1981
- Oppenheim, T. “CRASH2 Maintenance Volume I: Description of Results,” Wilson Hill Associates May 1981
- Memorandum from NHTSA distributed to all CRASH3 users dated December 11, 1981
- Day, T.D. Hargens, R.L. “Differences Between EDCRASH and CRASH3,” SAE Paper No. 850253 Society of Automotive Engineers Warrendale, PA February 1985
- Smith, R.A. Noga, T.J. “Accuracy and Sensitivity of CRASH,” NHTSA March 1982
- Woolley, R.L. Warner, C.Y. Tagg, M.D. “Inaccuracies in the CRASH3 Program,” SAE Paper No. 850255 Society of Automotive Engineers Warrendale, PA 1985
- Probability and Statistics for Engineers and Scientists Walpole, R.E. Myers, R.H. Macmillan Publishing Co., Inc. New York 1978
- Tumbas, N.S. Smith, R.A. “Measuring Protocol for Quantifying Vehicle Damage from an Energy Basis Point of View,” SAE Paper No. 880072 Society of Automotive Engineers Warrendale, PA February 1988
- Hargens, R.L. Day, T.D. “Vehicle Crush Stiffness Coefficients for Model Years 1970 - 1984, with Damage Profile Supplement,” Engineering Dynamics Corporation Lake Oswego, OR 1987