Recently, MGA Research Corporation was awarded a five-year multi-standard contract for the National Highway Traffic Safety Administration (NHTSA). Testing for this contract was awarded to MGA’s Michigan and Wisconsin facilities and includes FMVSS 200 series testing for crash, seats, head restraints, roof structures and more.
In November, MGA will conduct its first round of FMVSS 202a Dynamic Option testing for the NHTSA. MGA has been performing 202A dynamic testing since 2005 for many companies including OEM’s, various automotive seat suppliers, headrest suppliers, aftermarket suppliers, and military seat suppliers.
Through working with our customers, MGA has gained vast experience with this specification, having performed thousands of tests on many different types of seats and head restraints. Essentially, the dynamic 202A test is a rear impact crash simulation using a sled test system, which is designed to evaluate whiplash. A plot of the pulse is provided in Figure 1. The test requires meeting three criteria:
- Head to Torso Rotation (<12°)
- HIC (<500)
- Head Restraint Width (>170 mm measured 65 mm below the top of the head restraint)
The main requirement for this testing is that the posterior rotation of the head relative to the torso during the dynamic event must not exceed 12°. Prior to the release of the final rule back in 2004, this rotation was measured using video analysis by placing targets on the head and torso of the ATD and tracking the angle change of each and then taking the difference. Now the ATDs are equipped with head and chest gyros which directly measure the angular rotation. For the second criterion, HIC is a widely used calculation throughout the testing industry that is used to indicate the potential for a serious head injury.
If you would like to schedule a test, or simply learn more about this standard, please contact Kevin Oliverio by email at (email@example.com) or by phone at (248) 506-7381.