The application of passenger airbags nowadays still is a challenge. On the one hand, due to the increasing requirements for the restraint performance in different markets, on the other hand due to the increasing cost and time restaints for all involved development partners. If the structural environment of passenger airbag is taken into account, the following trends can be seen: Airbag module = Increasing standardization across large car platforms. Instrument panel (IP) = Later availability of production representative parts. Windscreen = Lower weight and thus reduced strength against airbag induced forces. The above mentioned trends lead to a higher sensitivity of the components inside the subsystem airbag/IP/windscreen. If - during the first tests with production parts - it turns out, that the windscreen is not able to withstand the airbag's deployment forces, the root cause can come from one, two or all three components of the subsystem. Because of the fact that these tests are done with production parts, this result will only be available in the late phase of the development program. Therefore, the possible counter measure will be limited to components which are adaptable in short term and this may not always lead to the optimum solution. As of today, there is hardly any simulation or testing method available which could quantify the load situation in the subsystem. Nor, it is possible to quantify the influence and performance limits of each of the a.m. components. Due to that, there is no possibility to design the components on the basis of the expected load from the other subsystem parts. This paper describes a methodology for measuring the interaction on the level of force and deformation in real time. Based on this analysis tool, the evaluation of windscreen loading can be done significantly earlier in the project. For the described tool, a representative IP cover simulation is necessary to receive realistic windscreen loads. This airbag cover simulation is described in the paper as well. With the presented methodology, the design process of the subsystem airbag/IP/windscreen can be optimized earlier in the project. Furthermore, root cause analysis in case of issues can be supported. In the long run, the gathered information can be used to create and validate predictive simulation models and give the OEMs the possibility to specify the appropriate component performance.


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    Titel :

    Innovative measurement and development tools at the interface between windscreen and passenger airbag


    Beteiligte:

    Erschienen in:

    Crash.tech, 2012 ; 14/1-14/7


    Erscheinungsdatum :

    2012


    Format / Umfang :

    7 Seiten, 6 Bilder


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch





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