Occupant&rsquo;s kinematics analysis and active seatbelt performance evaluation during vehicle braking

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (24) : 240-246.

Occupant’s kinematics analysis and active seatbelt performance evaluation during vehicle braking

XU Linli1, WANG Zhenfei2, HU Yuanzhi1, XU Zihong2, ZENG Xianjing3

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Abstract

Active control retractor (ACR) can reduce occupant's displacement during braking and injury risk in upcoming crash, but there are few related tests in China.Therefore, to investigate the effect of ACR on the out-of-position phenomenon of occupant in emergency braking, a vehicle test with an initial speed of 70 km/h was conducted with 2 male volunteers，the volunteer kinematics and belt physical parameters of ACR configuration and ordinary retractor configuration were quantitatively measured and analyzed, which provide reference for further research.The results show that after introducing the ACR system, the displacements of volunteer head and T1 are reduced by 34 mm and 27 mm respectively, and the webbing pull-out is reduced by 13 mm during braking, the webbing pull-in is increased by 62 mm at the end of braking, but there is no significant change in the peak velocities and the webbing forces.Furthermore, the results also show that displacements of volunteer (head, shoulder and T1 displacement) are highly positively correlated with the shoulder belt force.

Key words

active seatbelt / emergency braking / occupant’s kinematics / real world volunteer test

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XU Linli1, WANG Zhenfei2, HU Yuanzhi1, XU Zihong2, ZENG Xianjing3. Occupant’s kinematics analysis and active seatbelt performance evaluation during vehicle braking[J]. Journal of Vibration and Shock, 2020, 39(24): 240-246

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