汽车半主动乘员约束防护系统设计与动力学建模仿真

中国机械工程

汽车半主动乘员约束防护系统设计与动力学建模仿真

程文明1,2;李湘沪1;辛勇1;项忠珂2

1.南昌大学机电工程学院，南昌,330031
2.江西科技学院汽车工程学院，南昌,330098

出版日期:2018-03-10 发布日期:2018-03-08
基金资助:
国家自然科学基金资助项目（51265009）；
江西省教育厅科学技术研究资助重点项目(GJJ151145)
National Natural Science Foundation of China （No. 51265009）

Design and Dynamics Model Simulation of Vehicle Semi-active Occupant Restraint Protection Systems

CHENG Wenming1,2;LI Xianghu1;XIN Yong1;XIANG Zhongke2

1.School of Mechanical and Electrical Engineering， Nanchang University,Nanchang，330031
2.School of Automotive Engineering, Jiangxi University of Technology, Nanchang，330098

Online:2018-03-10 Published:2018-03-08
Supported by:
National Natural Science Foundation of China （No. 51265009）

摘要/Abstract

摘要： 设计了一种汽车的半主动乘员约束防护系统，该系统能根据反应时间余量来判断车辆发生碰撞的可能性，不同的可能性对应不同的危险等级，当危险能避免时则发出警报提醒驾驶员主动避免，不能避免时提前启动乘员约束保护装置。通过仿真分析软件MADYMO建立了汽车正面碰撞模型,并经试验验证了其正确性。对所设计的安全带预紧装置与座椅坐垫倾角调整装置进行仿真,然后与传统的被动执行机构仿真结果进行对比。结果表明：半主动乘员防护系统可提前实现安全带预紧和座椅坐垫倾角的调整，相比传统的被动防护系统中碰撞后火药预紧与座椅坐垫倾角不变，乘员的头部、髋部伤害略有减小，颈部弯矩峰值、胸部加速度、胸部压缩量分别减小了20.6%、14.6%、15.6%。所设计的半主动约束防护系统能有效减轻乘员的损伤。

关键词: 乘员约束, 乘员伤害, 主动预紧, 坐垫调节

Abstract: A semi-active vehicle occupant protection system was designed to estimate the possibilities of car collisions according to reaction time allowance. Based on different possibilities of collisions the situations would be classified into corresponding risk levels so as to alert the driver to avoid dangers, otherwise, passive protection system will be aroused in advance. The software of MADYMO was used to establish the simulation model of automobile front collisions, which was verified by tests. The designed seat belt preload device and the seat cushion obliquity adjusting device were simulated, and then compared with the simulation results of traditional passive actuating mechanisms. The results indicate that, compared with the traditional passive protection systems where gunpowder preloaded and the angle of seat cushion obliquity unchanged, semi-active occupant protection system may achieve seat belt preload and seat cushion tilt adjustment in advance, the head and hip trauma injury decline slightly, but the peak values of the neck bending moments, the chest accelerations and chest compressions decrease respectively by 20.6%,14.6%,15.6%. And the semi-active restraint system may effectively reduce occupants' injury.

Key words: occupant restraint, occupants' injury, active belt preload, cushion obliquity adjusting

中图分类号:

U461.91

程文明1,2;李湘沪1;辛勇1;项忠珂2. 汽车半主动乘员约束防护系统设计与动力学建模仿真[J]. 中国机械工程.

CHENG Wenming1,2;LI Xianghu1;XIN Yong1;XIANG Zhongke2. Design and Dynamics Model Simulation of Vehicle Semi-active Occupant Restraint Protection Systems[J]. China Mechanical Engineering.

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