汽车工程

汽车工程 ›› 2020, Vol. 42 ›› Issue (9): 1216-1223.doi: 10.19562/j.chinasae.qcgc.2020.09.011

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基于NSGA-Ⅱ的主动式安全气囊参数优化*

葛如海1,2, 崔义忠1, 洪亮1, 肖轩1   

  1. 1.江苏大学汽车与交通工程学院,镇江 212013;
    2.常熟理工学院,常熟 215500
  • 出版日期:2020-09-25 发布日期:2020-10-19
  • 通讯作者: 崔义忠,硕士,E-mail:15751000945@163.com
  • 基金资助:
    *国家自然科学基金青年项目(51805224)资助。

Optimization on Parameters of Active Safety Airbag by Using NSGA-Ⅱ

Ge Ruhai1,2, Cui Yizhong1, Hong Liang1, Xiao Xuan1   

  1. 1. School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013;
    2. Changshu Institute of Technology, Changshu 215500
  • Online:2020-09-25 Published:2020-10-19

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摘要： 校车乘员约束系统是保护儿童乘员碰撞安全的关键。本文中对主动式安全气囊的拉带长度、气体质量流率、气囊安装位置、排气孔开度、气囊初始压力、排气起始压力和座间距等7个控制参数对6岁儿童乘员的保护效果进行研究。通过灵敏度分析法,得到对6岁儿童乘员保护的关键参数为拉带长度、排气孔开度、排气起始压力和座间距。利用拉丁超立方试验设计和多项式响应面模型,构建了综合损伤指标、颈部损伤指标和主动式安全气囊关键参数的代理模型。采用非支配遗传算法,对综合损伤指标WIC和颈部损伤指标Nij进行多目标优化。结果表明,在拉带长度为0.205 m、排气孔开度为200%、排气起始压力为1.15×105 Pa和座间距为0.65 m时,综合损伤指标WIC和颈部损伤指标Nij同时取得较小值,分别下降了60.75%和60.94%,实现了在提高儿童乘员的综合保护效果的情况下尽可能减少儿童乘员颈部损伤的目标。

关键词: 主动式安全气囊, 多项式响应面模型, 非支配遗传算法, 优化

Abstract: The occupant restraint system of school bus is the key to protecting the safety of child occupant. The effects of control parameters such as the length of belt, the gas mass flow rate, the installation position, the opening degree of vent hole, the initial pressure of airbag, the initial pressure of exhaust and the distance between seats on the protection results of child occupant are studied in this paper. By using sensitivity analysis, the key parameters for children occupant protection are selected, i.e. the belt length, the vent hole opening degree, the exhaust initial pressure and the distance between seats. Based on the design of experiment with Latin hypercube sampling and polynomial response surface model, the surrogate models for weighted injury criteria (WIC), neck injury criterion Nij and key airbag parameters are constructed. A multi-objective optimization on WIC and Nij is conducted by using NSGA-II. The results show that with a belt length of 0.205 m, a vent hole opening degree of 200%, an exhaust initial pressure of 1.15×105 Pa and an inter-seat distance of 0.65 m, WIC and Nij simultaneously get a small value, reducing by 60.75% and 60.94% respectively, achieving the goal of reducing the neck injury as much as possible while enhancing the overall protection effects of child occupant

Key words: active safety airbag, polynomial response surface model, NSGA-Ⅱ, optimization