Occupant kinematic behavior and effects of a motorized seatbelt on occupant restraint of human volunteers during low speed frontal impact: mini‐sled tests with mass production car seat

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Ito, Daisuke¹; Ejima, Susumu¹; Kitajima, Sou¹; Katoh, Ryousuke¹; Ito, Hisao¹; Sakane, Masataka²; Nishino, Tomofumi²; Nakayama, Keita³; Ato, Tadayuki⁴; Kimura, Takaaki⁴

Occupant kinematic behavior and effects of a motorized seatbelt on occupant restraint of human volunteers during low speed frontal impact: mini‐sled tests with mass production car seat

Proceedings of the 2013 International IRCOBI Conference on the Biomechanics of Injury

Affiliations

¹Japan Automobile Research Institute (JARI)

²Faculty of Medicine, University of Tsukuba, Japan

³University of Tsukuba

⁴Takata Corporation
Abstract and keywords

The objective of this study is to evaluate occupant posture change during pre‐impact braking and explain the effects of a motorized seatbelt (MSB) on occupant restraint. In order to simulate the pre‐impact condition, low‐speed sled tests on young adult male volunteers were conducted with a vehicle seat, a seatbelt and a foot rest. In this study, two seatbelt systems and two muscle tone states were provided as test conditions. In order to evaluate the potential benefits of the MSB for posture maintenance, the volunteers were restrained by either a current three point seatbelt (SB) or the MSB. In order to examine the effect of muscle exertion on the physical motion, the experiments were conducted in two states: a relaxed state and a tensed state. Compared with the relaxed case, the upper torso motion was constrained by the muscle exertion in the tensed case. In addition, in both relaxed and tensed cases, the MSB worked effectively in restraining the upper body of the volunteers at the accelerating phase. The experiments and the results will provide useful information on occupant kinematics in an emergency situation, which is considered difficult to be measured in the vehicle cabin with high accuracy.

Keywords: low‐speed sled test, motorized seatbelt, muscle exertion, occupant kinematics, pre‐crash
Links

URL: http://www.ircobi.org/downloads/irc13/pdf_files/100.pdf

Cited Works (12)

Year	Entry
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Cited By (8)

Year	Entry
2014	Jastrzebski D, Miroslaw M, Dziewonski T. ATD model vs human model in combined frontal pre‐braking and lateral impact applications. In: Proceedings of the 2014 International IRCOBI Conference on the Biomechanics of Injury. September 10-12, 2014; Berlin, Germany.666-667.
2014	Huber P, Kirschbichler S, Prüggler A, Steidl T. Three‐dimensional occupant kinematics during frontal, lateral and combined emergency maneuvers. In: Proceedings of the 2014 International IRCOBI Conference on the Biomechanics of Injury. September 10-12, 2014; Berlin, Germany.668-669.
2017	Cutcliffe HC, Ólafsdόttir JM, Ӧsth J, Davidsson J, Brolin K. Gender differences in occupant posture during driving and riding. In: Proceedings of the 2017 International IRCOBI Conference on the Biomechanics of Injury. September 13-15, 2017; Antwerp, Belgium.23-33.
2018	Matsuda T, Yamada K, Hayashi S, Kitagawa Y. Simulation of occupant posture changes due to evasive manoeuvres and injury predictions in vehicle frontal and side collisions. In: Proceedings of the 2018 International IRCOBI Conference on the Biomechanics of Injury. September 12-14, 2018; Athens, Greece.512-523.
2018	Kang MK, Kim HJ, Kim KW, Lim D. Characteristics of passenger motion response in autonomous emergency braking system operation with alteration of body type and posture. In: Proceedings of the 2018 International IRCOBI Conference on the Biomechanics of Injury. September 12-14, 2018; Athens, Greece.565-566.
2019	Larsson E, Iraeus J, Fice J, Pipkorn B, Jakobsson L, Brynskog E, Brolin K, Davidsson J. Active human body model predictions compared to volunteer response in experiments with braking, lane change, and combined manoeuvres. In: Proceedings of the 2019 International IRCOBI Conference on the Biomechanics of Injury. September 11-13, 2019; Florence, Italy.349-369.
2022	Chan H, Albert DL, Gayzik FS, Kemper AR. Occupant kinematics of braced 5th percentile female and 50th percentile male volunteers in low-speed frontal and frontal-oblique sled tests. In: Proceedings of the 2022 International IRCOBI Conference on the Biomechanics of Injury. September 14-16, 2022; Porto, Portugal.771-792.
2015	Östh J, Brolin K, Bråse D. A human body model with active muscles for simulation of pretensioned restraints in autonomous braking interventions. Traffic Inj Prev. April 3, 2015;16(3):304-313.