The cooperative control of aeb ans passive safety systems for minimizing occupants’ injury in high velocity region

Kim, Eungseo; Sung, Donghyun; Kwon, Yongseok; Seo, Bopil; Lim, Dohyung; Cho, Hong; Unger, Michiel

Affiliations

¹Hyundai Motor Company, Republic of Korea

²Department of Mechanical Engineering, Sejong University, Republic of Korea

³TASS International, Republic of Korea

⁴TASS International, Germany

Abstract

AEB system is a representative safety system to help avoiding forward collision or mitigate the velocity resulting in reduction of occupant′s injury risk. Fatality ratio increases rapidly in in high velocity region, but Euro NCAP, US NCAP and IIHS evaluate AEB system under the relative velocity of 60kph. In the aspect of injury risk, it becomes more important to maximize it’s efficiency in higher velocity region and to investigate the effect of active and passive combined safety system because occupant′s motion increases as the impact speed is reduced in pre-crash phase. Therefore, the control and design of active and passive safety measures need to minimize the occupants’ injury through the cooperative control of AEB’s braking profile and PSB (Pre-safe Seat Belt), airbags, motion of seat and steering Wheel.

For this, computer simulation is carried out in pre and post phase of crash. In active safety simulation, vehicle behavior in Pre-crash phase is correlated well between real car and model. The vehicle′s behavior according to different braking profile is produced and it is used to reproduce the motion and injury of H-3 dummy and active human body model with the relation to airbag deployment in the passive safety analysis. Also, volunteer test for measuring occupants′ behavior in order to validate simulation data and correlate between model and real human with the parameter change of PSB activation and AEB braking profiles. From this study, it is found out that PSB activation time and load don′t have much effect on injury, while braking profile is effective. In case of 40kph unbelted test mode, bottom-out between head and windshield, chest and crash-pad occur due to pre-crash motion and OOP situation. The airbag TTF also plays important role to reduce injury risk. The control of steering wheel and passenger seat gave little effect on injuries. From the volunteer tests, the occupant’s motion was measured by video analysis and IMU sensor to verify simulation data.

The cooperative control of active and passive integrated safety system will be helpful to deduce occupants′ injury in high velocity region when braking profile is controlled well by the communication with passive safety systems.

Links

URL: http://indexsmart.mirasmart.com/25esv/PDFfiles/25ESV-000325.pdf

Cited Works (6)

Year	Entry
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