A study on occupant injury protection of autonomous vehicle in side impact based on a seat rotation strategy

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (24) : 312-322.

WU Hequan1,2, WANG Haitao1, HU Lin1

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Abstract

In autonomous driving, the angle of the passenger seat can be freely adjusted, making the interior space more spacious. In order to improve the safety of passengers in side collisions with different seat back angles, a strategy is proposed to first rotate the passenger seat to a 180 ° angle with the collision direction before colliding. The damage situation of passengers in collisions after rotation under different seat back angles is explored, and the applicability of this strategy is discussed. The influence of factors such as seat back angle and collision time delay on passenger kinematic response and injury risk in different collision scenarios was explored through simulation experiments. The research results show that in side impact simulation tests, there is a risk of secondary collision contact between the upper body of passengers with seat back angles of 100 ° and 120 ° and other passengers or car components. In collision strategies with rotating seats at different backrest angles, adjusting the collision delay time can effectively reduce the risk of head displacement and injury for passengers. Through simulating the collision of the seat after rotating 90 ° within 200ms, it was found that this strategy did not cause additional damage to the occupants, and the strain of the occupants' viscera did not exceed the damage threshold. It also showed a relatively low comprehensive damage risk at different backrest angles. The difference in seat backrest angle has a significant impact on passenger motion response. The strategy of turning the seat to 180 ° first and then crashing can effectively reduce the lateral deviation of the passengers in side impact, reduce the risk of injury in contact with other passengers or other parts in the vehicle, and improve the safety of side impact of autonomous vehicle.

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Automotive engineering / Active security strategy / Autonomous vehicle / Different postures / Side impact;

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WU Hequan1, 2, WANG Haitao1, HU Lin1. A study on occupant injury protection of autonomous vehicle in side impact based on a seat rotation strategy[J]. Journal of Vibration and Shock, 2024, 43(24): 312-322

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