GM Helps Evaluate Rear Impact Crash Dummy

DETROIT, MI - General Motors, which has a long history of crash test dummy design, is leading research on the potential for global auto industry use of a new dummy that would help automakers and safety experts better understand how crash victims are hurt in rear impacts.

The dummy, called BioRID, was designed by Chalmers University in Gothenburg, Sweden, for seat restraint assessment. It is distinguished by its sophisticated spinal column with 24 vertebra simulators that allow it to sit naturally and demonstrates humanlike neck movement in rear-end collisions.

To gain acceptance, BioRID needs to deliver repeatable, reproducible test results, which is considered integral to the design and evaluation of vehicle safety. 

GM crash test engineer Barbara Bunn recently developed and conducted tests to evaluate the ability of different BioRIDs to produce consistent measurements when subjected to identical tests. The United States Council for Automotive Research in May recognized Bunn for her execution of the test matrix.

“The test matrix Barb developed will be helpful to the industry for determining BioRID’s future, and demonstrates GM’s commitment to advancing crash test dummy technology and procedures for evaluating vehicle safety,” said Gay Kent, GM general director of Vehicle Safety and Crashworthiness.

To create the test matrix, Bunn, who chairs the Occupant Safety Research Partnership’s Rear Impact Dummy Task Group, collaborated with engineers from Chrysler, Ford and Humanetics Innovative Systems, which manufactures the BioRID. She designed the construction of a crash simulator sled to simultaneously test four BioRIDs. She worked with safety engineers from Porsche, Volkswagen, Daimler, Chrysler and Ford to determine seating postures and other test criteria.

The tests subjected the dummies to a low-speed rear impact simulation in nearly identical seats, and collected measurements of crash forces on areas such as the upper and lower neck. The team compared its measurements to data from similar tests conducted by other automaker labs in Europe and provided its findings to regulators worldwide for consideration.

BioRID is one of many so-called anthropomorphic test devices, or ATDs, the formal name for crash test dummies. GM routinely tests with a wide range of adult male-, female- and child-size ATDs that house sophisticated data collection sensors, capable of generating status reports 10,000 times per second.

GM engineers analyze data from physical crash tests and computer simulations to understand how a vehicle, its safety systems and occupants respond during a crash. These data help engineers look for ways to enhance vehicle safety.

The efforts are evident across the GM’s product lineup. For the 2012 model year 14 Chevrolet, Cadillac, Buick and GMC vehicles have been named 2012 Top Safety Picks by the Insurance Institute for Highway Safety, which includes rear impact testing among its criteria for Top Safety Pick. Eleven 2012 models have received 5-Star Overall Vehicle Scores in U.S. New Car Assessment Program testing administered by the National Highway Traffic Safety Administration.

“The execution of the BioRID test matrix couldn’t have been done without a strong spirit of collaboration,” Bunn said. “Ultimately, every automaker wants to improve the crash dummies that we use to design safety into our vehicles. That way, all of our customers will benefit in the long run.”

Courtesy of Muncie Free Press