Optimization of AEB trigger width based on pedestrian crossing scenario

Abstract

In order to study influence of trigger width on pedestrian crossing scenario results in AEB control strategyꎬ road and vehicle models were built by using automatic driving simulation software PreScan. Thenꎬ AEB longitudinal control algorithm was designed in Matlab model’ s control platform Simulink to simulate pedestrians crossing scenarios. And trigger width was continuously adjusted to observe whether collision was avoided. The results show that when car speed is 30-50 km / hꎬ the system's trigger width is at 1􀆰 75 mꎬ which can help avoid collision effectively. When speed is 50-80 km / hꎬ it needs to 中 国 安 全 科 学 学 报 China Safety Science Journal 第30卷 2020年 increase along with the increase of pedestrian speed. The wider it isꎬ the more information car receivesꎬ and the more possible AEB malfunction will be. Thereforeꎬ the maximum trigger width is set to be 3􀆰 5 m. When car speed reaches between 60-80 km / hꎬ it is necessary to optimize alue and full braking advance time simultaneously so as to avoid collision.