radar measurements for automotive test surrogate … were used to generate error trade curves for a...
TRANSCRIPT
Michigan Tech Research Institute (MTRI) Michigan Technological University 3600 Green Court, Suite 100 Ann Arbor, MI 48105
(734) 913-6840 – Phone (734) 913-6880 – Fax www.mtri.org
Radar Measurements for Automotive Test Surrogate Design
Collaborative Safety Research Center
Toyota
University of Michigan Transportation Research Institute
Results Radar measurements of the vehicles and our surrogate were used to generate error trade curves for a hypothetical detector. The detector error trade plot at right, compares a detector’s ability to distinguish between a vehicle and empty road. We show the error rates based on four of the targets in our study: 1. Worst Case, which produces the most errors 2. Best Case, which produces the least errors 3. Nominal, the target with the median errors 4. UMTRI v2, the second version of our fabricated surrogate.
Measurements We measured the radio frequency response of 25 vehicles at 30 aspects near tail-on. These measurements allowed us to identify principal reflection sources of cars, which include: Bumper, license plate shelter, rear-axle, mufflers and tail-lights.
Target Requirements For rear-end crash tests, surrogate targets are used as substitutes for actual vehicles. To evaluate automotive PCS, we require surrogate targets that do not endanger the test drivers, or impose unsupportable cost. The surrogate targets must appear like a vehicle to the PCS. To test PCS systems that use millimeter wave radars, the surrogate must embody RF scattering characteristics of real vehicles.
Background Pre-Collision Systems (PCS) are designed to reduce the severity of automobile crashes. Automotive PCS radars provide estimates for the range and closing speed of vehicles allowing the PCS to estimate time-to-collision and initiate crash mitigation strategies.
Surrogate designed by MTRI, UMTRI and CSRC Toyota, is shown above testing a PCS system at Michigan International Speedway Test Track, 2014.
Reference David J. LeBlanc, Mark Gilbert, Steve Stachowski, Daniel Blower, Carol A. Flannagan,
Steve Karamihas, William T. Buller, Rini Sherony (2013). Advanced Surrogate Target Development for Evaluating Pre-Collision Systems. 23rd International Technical Conference on the Enhanced Safety of Vehicles (ESV), Seoul Korea, 2013.
William Buller MTRI
[email protected] (734) 913-6867
Rini Sherony CSRC Toyota
David LeBlanc U of M, UMTRI
This project is a collaboration with Toyota's Collaborative Safety Research Center (CSRC), University of Michigan’s Transportation Research Institute (UMTRI) and the Michigan Tech Research Institute (MTRI) - all of which are located in Ann Arbor.