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Behavior of Toyota Airbag Control Modules Exposed to Low and Mid-Severity Collision Pulses
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 28, 2017 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
The repeatability and accuracy of front and rear speed changes reported by Toyota’s Airbag Control Modules (ACMs) have been previously characterized for low-severity collisions simulated on a linear sled. The goals of the present study are (i) to determine the accuracy and repeatability of Toyota ACMs in mid-severity crashes, and (ii) to validate the assumption that ACMs function similarly for idealized sled pulses and full-scale vehicle-to-barrier and vehicle-to-vehicle crashes. We exposed three Toyota Corollas to a series of full-scale aligned frontal and rear-end crash tests with speed changes (ΔV) of 4 to 12 km/h. We then characterized the response of another 16 isolated Toyota ACMs from three vehicle models (Corolla, Prius and Camry) and 3 generations (Gen 1, 2 and 3) using idealized sled pulses and replicated vehicle-to-vehicle and vehicle-to-barrier pulses in both frontal and rear-end crashes (ΔV = 9 to 17 km/h). The ACM-reported speed changes were compared to reference speed changes calculated by integrating an accelerometer signal. The pooled data for reference speed change were then linearly regressed against the following predictors: ACM-reported speed change, peak acceleration, vehicle type, collision type and ACM generation. We found that all of the independent variables had a significant effect in at least one of the models we considered, although ACM-reported speed change and ACM generation had the largest effects on the outcome. We found significant differences between the full-scale collisions and the sled pulses for frontal impacts, but these differences were small (<0.2 km/h) compared to the other variables. This study furthers our understanding of how Toyota ACMs behave in low and mid-severity collisions.
- Felix Lee - MEA Forensic Engineers & Scientists
- Peter Xing - MEA Forensic Engineers & Scientists
- Mike Yang - MEA Forensic Engineers & Scientists
- Janice Lee - MEA Forensic Engineers & Scientists
- Craig Wilkinson - MEA Forensic Engineers & Scientists
- Gunter P. Siegmund - MEA Forensic Engineers & Scientists
CitationLee, F., Xing, P., Yang, M., Lee, J. et al., "Behavior of Toyota Airbag Control Modules Exposed to Low and Mid-Severity Collision Pulses," SAE Technical Paper 2017-01-1438, 2017, https://doi.org/10.4271/2017-01-1438.
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