汽车与电动两轮车碰撞典型场景下的AEB纵横向触发策略研究

doi:10.19562/j.chinasae.qcgc.2023.03.017

Abstract

Abstract:

The transverse trigger fixation width of the autonomous emergency breaking （AEB） system is one of the important factors for collision avoidance failure in the collision accident between automobiles and electric two-wheeled vehicles. In order to improve the collision avoidance reliability of the AEB system， this paper establishes an AEB longitudinal and transverse trigger TTC difference model based on the analysis of the longitudinal and transverse TTC （Time to collision） difference range of the critical conditions of the collision between an automobile and an electric two-wheeled vehicle. Based on PreScan， Matlab/Simulink and CarSim simulation platforms， two typical collision accident scenarios between cars and electric two-wheelers are established and compared with the AEB strategies with fixed transverse trigger widths of 1.75 and 3.75 m. The results show that the proposed AEB longitudinal and transverse triggering TTC difference model performs better in collision avoidance rate and can achieve collision avoidance at vehicle speeds below 54 km/h. In typical scenario 1， the crash avoidance rate is 88.9% （45 cases）， and the average crash speed of unavoidable crashes decreases from 70.6 to 29.7 km/h. In typical scenario 2， the crash avoidance rate is 80% （30 cases）， and the average crash speed of unavoidable crashes decreases from 66 to 18.2 km/h. The AEB longitudinal-triggering TTC differential model has good reliability and robustness， improves road safety of cars and electric two-wheelers， and provides an important theoretical reference for the development of automotive active safety systems.

Key words: vehicle crash accidents, electric two-wheeler, longitudinal and transverse trigger TTC difference model, AEB, typical collision scenario

Yong Han,Xiaobin Yuan,Ming Lu,Xiaotian Tan. Research on AEB Longitudinal and Transverse Triggering Strategy in Typical Scenarios of Vehicle to Electric Two-Wheelers Collisions[J].Automotive Engineering, 2023, 45(3): 501-509.

Figures/Tables 13

参数	数值
整车质量/kg	1 820
质心至前轴距离/m	1.265
质心至后轴距离/m	1.682
质心高度/m	0.59
车体绕Z轴的转动惯量/ $(k g ? m 2)$	4 095
发动机功率/kW	300
轮胎规格	225/60/R18
前轮制动转矩/制动压力/ $(N ? m · M P a - 1)$	400
后轮制动转矩/制动压力/ $(N ? m · M P a - 1)$	150

仿真工况	对应典型场景	事故信息
仿真工况	对应典型场景	汽车速度/ $(k m ? h - 1)$	ETW速度/ $(k m ? h - 1$ ）	碰撞位置
仿真工况1	1	45.4	19.5	前端左侧
仿真工况2	2	40.5	18	前端右侧

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典型场景序号	1	2
场景描述	白天，直行汽车与远端垂向ETW碰撞	白天，直行汽车与同向左转的ETW碰撞
汽车碰撞速度	25-50 km/h	25-45 km/h
ETW碰撞速度	20-30 km/h	15-25 km/h
场景示意图

Research on AEB Longitudinal and Transverse Triggering Strategy in Typical Scenarios of Vehicle to Electric Two-Wheelers Collisions

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