Browse Publications Technical Papers 2005-01-1190
2005-04-11

The Accuracy and Sensitivity of 2003 and 2004 General Motors Event Data Recorders in Low-Speed Barrier and Vehicle Collisions 2005-01-1190

Crash data stored in the airbag sensing and diagnostic modules (SDMs) of General Motors vehicles can provide useful information for accident investigators. To quantify the accuracy and sensitivity of select 2003 to 2004 SDMs, two types of tests were performed. First, three 2004 vehicles underwent 136 vehicle-to-barrier and vehicle-to-vehicle collisions with speed changes up to 8 km/h. Second, 2003 and 2004 model year SDMs underwent a range of crash pulses using a linear sled. In all of the tests the speed change reported by the SDM underestimated the actual speed change. The speed change underestimates ranged from 0.2 to 2.9 km/h except for several anomalous tests in which the underestimate was as high as 12.3 km/h. The magnitude of this error varied with crash pulse shape. Increasing crash pulse duration and decreasing peak acceleration increased the difference between the actual and SDM reported speed change. The threshold accelerations for the SDMs tested ranged from 1.1 to 2.7g. Threshold acceleration models explain the variations in accuracy. This study furthers the understanding of the accuracy of the SDM reported speed change at low speeds and the collision parameters which can affect it.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

The Accuracy and Sensitivity of Event Data Recorders in Low-Speed Collisions

2002-01-0679

View Details

TECHNICAL PAPER

The Accuracy of Crash Data Saved by Ford Restraint Control Modules in Lowcspeed Collisions

2004-01-1214

View Details

TECHNICAL PAPER

The Accuracy of Pre-Crash Speed Captured by Event Data Recorders

2003-01-0889

View Details

X