Statistical considerations for evaluating biofidelity, repeatability, and reproducibility of ATDs

Nusholtz, G.; Ben Aoun, Z.; Di Domenico, L.; Hsu, T.; Luna, M. A. G.; De La Mora, J. A. P.

Affiliations

Abstract

Presented in this paper are two numerical/statistical methods for determining if the impact time- history response of a mechanical system is repeatable or reproducible; such a system could be a vehicle, a biological human surrogate, Anthropometric Test Device (ATD or dummy), etc. The responses could be sets of time-histories of accelerations, forces, moments, etc., of a component or of the system. The example system evaluated is the BioRID II rear impact dummy. The evaluation begins by transforming the sets of time-histories into sets of relative-shapes and magnitudes of the response time histories. The two statistical procedures use the t and T²-tests. One uses a statistical comparison of the average time history of a set (Representative Curve (RC)) to the individual time histories of that set or other sets. The other procedure uses a statistical comparison of sets of time histories. The statistical analysis is then performed on the sets of the relative-shapes and magnitudes. Both methods indicate the BioRID II is neither repeatable nor reproducible for the neck moment.

Links

URL: http://www-nrd.nhtsa.dot.gov/pdf/bio/proceedings/2011_39/39-9.pdf

Cited Works (6)

Year	Entry
2009	Nusholtz GS, Hsu TP, Shi Y, Kochekseraii SB, Luna MAG. Creating representative curves from multiple time histories of vehicle, ATD and biomechanics tests. In: Proceedings of the 21st International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 15-18, 2009; Stuttgart, Germany.
2000	Xu L, Agaram V, Rouhana S, Hultman RW, Kostyniuk GW, McCleary J, Mertz H, Nusholtz GS, Scherer R. Repeatability evaluation of the pre-prototype NHTSA advanced dummy compared to the Hybrid III. In: Proceedings of the SAE World Congress. March 6-9, 2000; Detroit, MI. Warrendale, PA: Society of Automotive Engineers. SAE 2000-01-0165.
2007	Nusholtz GS, Hsu TP, Byers LC. A proposed side impact ATD bio-fidelity evaluation scheme using cross-correlation approach. In: Proceedings of the 20th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 18-21, 2007; Lyon, France.
2009	Bortenschlager K, Hartlieb M, Hirth A, Kramberger D, Stahlschmidt S. Detailed analysis of BioRID-II response variations in hardware and simulation. In: Proceedings of the 21st International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 15-18, 2009; Stuttgart, Germany.
2009	Gehre C, Gades H, Wernicke P. Objective rating of signals using test and simulation responses. In: Proceedings of the 21st International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 15-18, 2009; Stuttgart, Germany.
2010	Nusholtz GS, Hsu TP, Luna MAG, DiDomenico L, Kochekseraii SB. The consequences of average curve generation: implications for biomechanics data. Stapp Car Crash J. 2010;54:1-18. SAE 2010-22-0001.