Simulation Research On Dual Stage Inflator Airbag

During accidents of vehicle impact, airbags and belts or other restraint system havesignificant efficiency in protecting passengers or drivers from severe injury. However,airbag system often causes unnecessary damage because of complex environmentalconditions in car collisions. Unnecessary damages will greatly reduce protection effects ofconstraint system. Due to its excellent protection performance, dual stage inflator airbagsystem has been widely used in the United States and other developed countries.MADYMO software in virtual crash testing is used for crash simulation analysis ofdriver restraint systems equipped with two stage gas generator airbag in the paper. Bycomparing performance of single or double stage gas generator in collision accidents, it canbe proved that the dual stage inflator airbag system has a more excellent performance.Based on a real vehicle crash test data, protection performance of driver-side constraintsystem equipped with dual stage inflator airbag system is analyzed.Firstly, frontal crash simulation mode based on C-NCAP was created in crash simulationsoftware MADYMO. Crash acceleration curve created by real vehicle experiment is imposedto simulation model in MADYMO. Based on the experimental results of output, validity ofthe model is proved by comparing with real vehicle experiment data comparison.Secondly, original system is replaced by dual stage inflator airbag system, sameacceleration incentive is applied to new test system and simulation test is done. By comparingtest results, dual stage inflator airbag system has more excellent properties in the occupantprotection.Finally, According to problems existed in the driver side constraint system equipped withdual stage inflator airbag system, optimization direction of this topic in the constraintsystem and method of optimization are determined. By arranging for orthogonal experimentand analysis of experiment results, ultimate constraint system parameters are determined.Through verifying mutual contrast experiment results, effectiveness of optimizationmethods is proved in this article.