AEB制动对THOR 50th假人乘坐姿态影响

doi:10.3969/j.issn.1674-8484.2021.04.008

摘要/Abstract

摘要：

为了获得在制动紧急系统 (AEB）系统作用下THOR 50^th假人姿态变化特征,论述了车辆AEB系统在前车静止（CCRs）、前车慢行（CCRm）和前车制动（CCRb）3种测试工况试验方法并获取了AEB系统近似梯形的典型制动波形,采用二项式拟合方法构建了典型波形,分析了THOR 50^th假人坐姿离位特征。结果表明：当初始速度低于40 km/h时,相同初始速度下,减速度越大,THOR 50^th假人头部和胸部前倾量越大;在相同制动加速度下,初始车速增大,假人头部和胸部位移增大;在初始速度为40 km/h时,AEB紧急制动造成头部和胸部离位程度最大。

关键词: 汽车安全, 制动紧急系统 (AEB), THOR 50^th假人, 制动波形, 姿态变化特征

Abstract:

The test methods of three test cycles as CCRs(car to car rear stationary), CCRm (car to car rear moving) and CCRb (car to car rear braking) of AEB system were elaborated to investigate the posture change characteristics of the THOR 50^th dummy affected by the autonomous emergency braking(AEB) system and to obtain the typical braking waveform of AEB system similar to trapezoid. The typical waveform was constructed with the binomial fitting method to analyze the postural out-of-position characteristics of THOR 50^th dummy. The results show that when the initial speed is lower than 40 km/h, the forward leaning of the head and chest of THOR 50^th dummy increases as the deceleration increases, and the out-of-position of the dummy’s head and chest increases as the initial vehicle speed increases under the same braking acceleration; AEB emergency braking can cause the largest degree of the out-of-position of the head and chest at the initial speed of 40 km/h.

Key words: vehicle safety, autonomous emergency braking (AEB), brake-wave, THOR 50^th dummy, posture change characteristic

中图分类号:

U461.91

孙振东, 朱海涛, 彭伟强. AEB制动对THOR 50^th假人乘坐姿态影响[J]. 汽车安全与节能学报, 2021, 12(4): 499-506.

SUN Zhendong, ZHU Haitao, PENG Weiqiang. Influence of AEB for THOR 50th dummy seating position[J]. Journal of Automotive Safety and Energy, 2021, 12(4): 499-506.

图/表 14

图1 3种测试工况中的制动测试场景

图2 3种车型的AEB制动波形

图3 最小二乘法拟合曲线示意图

图4 制动梯形脉冲类型1

图5 制动梯形脉冲类型2

图6 双级制动梯形波

图7 制动减速度-制动时间关系

图8 制动减速度正态分布

图9 AEB系统典型制动波形实施示意图

t / s	v / (m·s^-1)	a / (m·s^-2)	S / m
0	0	0	0
4.6	27.8	5.9	64
5.6	27.8	0	92
6.9	17.8	7.6	122
8.0	17.8	0	142

表1 系统制动过程阶段加速度

图10 牵引系统控制方案

图11 试验台车及假人设置

图12 牵引系统速度与加速度-时间响应曲线

图13 假人头部和胸部向前最大位移量

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