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针对在安全气囊控制器开发过程中需要进行大量实车或台车碰撞试验,获得点火阈值验证曲线试验工作量大、成本高昂的问题,进行了可提高开发效率降低开发成本试验方法的替代方案研究。基于安全气囊控制器工作原理,提出了一种利用摆锤冲击滑车模拟汽车碰撞前期30ms加速度波形的试验方法,替代安全气囊控制器前期开发的台车试验验证,开发出了相应的试验装置,建立并验证了该系统的有限元模型。基于实际碰撞中加速度的差异性,引入双梯形理论对实车碰撞曲线进行了简化,并应用该方法模拟简化后的加速度曲线,并对某新开发的气囊控制器进行试验验证。研究结果表明:该验证方法得到的安全气囊点火判断曲线与实车碰撞试验获得的曲线最大误差在10%以下,采用摆锤冲击滑车的模拟碰撞波形的试验方法可以用于安全气囊控制器的开发设计。
Aiming at the problem that large amount of real car or trolley collision test needs to be carried out in the process of developing airbag controller and the experiment of ignition threshold value verification curve is heavy workload and high cost, an alternative scheme to improve the development efficiency and reduce the development cost is studied . Based on the working principle of the airbag controller, a test method of using the pendulum impact pulley to simulate the 30ms acceleration waveform of the automobile collision early stage is proposed. Instead of the experimental verification of the early development of the airbag controller, a corresponding experimental device is developed and established And verified the finite element model of the system. Based on the difference of accelerations in actual collision, double trapezoidal theory is introduced to simplify the actual vehicle collision curve, and the simplified acceleration curve is simulated by this method. Finally, a newly developed airbag controller is tested and verified. The results show that the maximum error between the curve obtained by this verification method and the actual vehicle crash test is less than 10%. The test method using the simulated impact waveform of the pendulum impact pulley can be used in the development of the airbag controller design.