Most 1999 and newer General Moters (GM) vehicles have an event data recorder (EDR) that can record pre-crash speed incorporated into the airbag sensing and diagnostic module (SDM). The accuracy of the SDM-reported pre-crash speed over a wide range of speeds has not been previously tested and reported. In this study, the SDMs of three late-model GM passenger cars were artifically triggered while driving at a constant speed between 1 and 150 km/h. The SDM-reported pre-crash speeds were compared to speeds measured by a calibrated 5th-wheel of known accuracy. The results showed that the accuracy of the SDM-reported pre-crash speed varied with both speed and vehicle. The overall uncertainty associated with all three SDMs tested varied from a 1.5 km/h overestimation of vehicle speed at low speeds to a 3.7 km/h underestimation of vehicle speed at high speeds. Within the limits of this study, these results can be used to quantify the accuracy of SDM reported pre-crash speed for use in engineering analyses of automobile crashes.


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    Title :

    The accuracy of pre-crash speed captured by event data recorders


    Contributors:


    Publication date :

    2003


    Size :

    5 Seiten, 2 Bilder, 2 Tabellen, 6 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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