Pre-crash scenarios and AEB optimization between vehicle and two-wheeler

The application of autonomous emergency braking (AEB) is faced with challenges of misidentification and unreasonable decision. Testing under typical scenarios can effectively improve the applicability of AEB. Based on the analysis of relevant research literature, two typical scenarios (S11 and S12) involving participants turning that AEB test focuses on are extracted from 12 types of two-wheeler and vehicle pre-crash scenarios. Pre-scan model and mathematical model are established to conduct qualitative and quantitative analysis on the effectiveness and improvement direction of AEB under the typical scenarios. In scenario S11 and S12, the trajectory of the two-wheeler in the moving coordinate system is only related to the speed ratio between the vehicle and the two-wheeler. In scenario S11, only when the speed ratio of vehicle to two-wheeler is $ \left( {0.788\;8, + \infty } \right) $, the two-wheeler can enter the AEB triggering domain. By increasing the field of view from $ {60^\circ } $ to $ {90^\circ } $, the AEB can be effectively improved, and the range of speed ratio increases from $ \left( {0.788\;8, + \infty } \right) $ to $ \left( {0.203\;3, + \infty } \right) $. In scenario S12, when the speed ratio of two-wheeler to vehicle is $ (0,{{(\Delta v + 2.46)} \mathord{\left/ {\vphantom {{(\Delta v + 2.46)} {9.64}}} \right. } {9.64}}) $, the AEB has a good triggering effect. When the triggering width of AEB is expanded from 1.5 m to 2 m, the AEB triggering effect is not greatly improved. The research methods and conclusions can provide technical support for AEB optimization.