Browse Publications Technical Papers 2014-01-0504
2014-04-01

Accuracy and Timing of 2013 Ford Flex Event Data Recorders 2014-01-0504

2013 and 2014 Ford Flex vehicles and airbag control modules with event data recorders (EDRs) were tested to determine the accuracy of speed and other data in the steady state condition, to evaluate time reporting delays under dynamic braking conditions, and to evaluate the accuracy of the stability control system data that the module records. This recorder is from the Autoliv RC6 family and this is the first known external research conducted on post 49CFR Part 563 Ford EDRs.
The vehicle was instrumented with a VBox and a CAN data logger to compare external GPS based speeds to CAN data using the same synchronized time base. The vehicle was driven in steady state, hard braking, figure 8 and yaw conditions. The Airbag Control Module (ACM) was mounted onto a moving linear sled. The CAN bus data from driving was replayed as the sled created recordable events and the EDR data was compared to the reference instrumentation.
The accuracy and timing of the data on a second stability control CAN bus was verified, and the transfer function between the CAN bus data and the EDR data was mapped, such that EDR data from any set of CAN data can be predicted. The speed data was well within the accuracy limits of +/−4% published in earlier EDR papers. The steering and yaw data from the EDR are reported opposite the SAE sign convention. Overall, the data demonstrates the accuracy of the RC6 EDR functionality.

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:
JOURNAL ARTICLE

On the Digital Forensics of Heavy Truck Electronic Control Modules

2014-01-0495

View Details

JOURNAL ARTICLE

Timing and Synchronization of the Event Data Recorded by the Electronic Control Modules of Commercial Motor Vehicles - DDEC V

2013-01-1267

View Details

TECHNICAL PAPER

Behavior of Toyota Airbag Control Modules Exposed to Low and Mid-Severity Collision Pulses

2017-01-1438

View Details

X