Development of a new biofidelity ranking system for anthropomorphic test devices

Area of Science:

• Biomechanics
• Automotive Safety Engineering
• Injury Biomechanics

Background:

• Crash test dummies are crucial for evaluating vehicle safety.
• Existing dummies have limitations in accurately replicating human responses during side impact collisions.
• A standardized biofidelity assessment system is needed to compare dummy performance.

Purpose of the Study:

• To develop and apply a novel biofidelity assessment system for evaluating side impact dummies.
• To quantify the external and internal biofidelity of the WorldSID-alpha, ES-2, and SID-HIII dummies.
• To rank dummy performance based on their ability to replicate cadaver responses relevant to injury prediction.

Main Methods:

• Utilized cadaver and dummy responses from head drop, pendulum, and sled tests.
• Assigned weight factors to test conditions based on human subject data and regulatory relevance (FMVSS 214, SNCAP, FMVSS 201).
• Calculated Cumulative Variance (DCV/CCV) ratios to assess dummy response duplication of mean cadaver responses, with lower ratios indicating better biofidelity.

Main Results:

• The WorldSID-alpha prototype demonstrated superior External Biofidelity compared to the ES-2 and SID-HIII dummies.
• All evaluated dummies require further improvements to accurately replicate human kinematics.
• Internal Biofidelity, related to injury prediction, was found to be similar across all three dummy types.

Conclusions:

• The developed biofidelity assessment system provides a quantitative method for ranking crash test dummy performance.
• The WorldSID-alpha shows promise as a more biofidelic dummy for side impact testing.
• Continued research and development are necessary to enhance dummy biofidelity for improved vehicle safety evaluations.