安全气囊ECU安装点动刚度改进

Dynamic Stiffness Improvement on the Airbag-ECU Attachment Point Structure

在车辆安全气囊开发过程中,气囊ECU安装点的结构动刚度有着严格的要求,安装点动刚度不足会影响气囊ECU在车辆碰撞中采集加速度信号的准确性,从而影响安全气囊起爆的控制精度。某车型最初的车身结构在气囊ECU安装点的动刚度不能达到设计要求,为了改进车身结构,采用有限元分析方法计算安装点的动刚度,通过多轮方案分析对比,最终设计出了满足要求的新结构。

In the development of the vehicle air-bag system, there is a very strict requirements for the dynamic stiffness of the air-bag ECU attachment point on the body. The dynamic stiffness of the attachment point impact the accuracy of the acceleration signal adopted by the airbag ECU during the vehicle collision process. Thus affect the accuracy of the airbag detonation control. Early stage in the development of a car,the dynamic stiffness of the attachment point initial body structure the alrbag ECU can not meet the design ：requirements. In order to improve the body structure stiffness using finite element method to simulate the dynamic stiffness of the attachment point and optimize the body structure several rounds. Finally, the proposal meet the design requirements is designed.