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The Effect of Target Features on Toyota’s Autonomous Emergency Braking System
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 03, 2018 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
The Pre-Collision System (PCS) in Toyota’s Safety Sense package includes an autonomous emergency braking feature that can stop or slow a vehicle independent of driver input if there is an impending collision. The goals of this study were to determine how hazard characteristics, specifically radar reflector size and degree of target edge contrast, affect the response of the PCS, as well as to scrutinize tests wherein the PCS failed to stop the vehicle before impact. We conducted 80 tests with a 2017 Toyota Corolla driven towards a car-like target in a straight line and under constant accelerator pedal position, reaching about 30 km/h at the PCS alarm. Vehicle speed and distance to target at the alarm flag (ALM) and at times corresponding to three other system flags (PBA, FPB, and PB) were read from the Vehicle Control History records. Time to impact (TTI) at each flag was calculated and the distance between the stopped vehicle and the target was measured for each test. The PCS detected the hazard in all tests. We found that when there was little or no driver input, the PCS stopped the vehicle autonomously in all but one test. Target radar size and contrast did not affect the speeds, distances or TTIs in these tests. In some tests, the PCS and ABS interacted in a way that increased the stopping distance. In a small number of tests, the PCS disengaged partway through its algorithm and returned control to the driver for reasons that we were unable to discern. This study provides some initial insights into the dynamic response of the Toyota PCS and identifies some factors that affect its performance.
|Technical Paper||The Accuracy of Toyota Vehicle Control History Data during Autonomous Emergency Braking|
|Technical Paper||Commercial Business Viability of IntelliDrive SM Safety Applications|
- Mike Yang - MEA Forensic Engineers & Scientists
- Peter Xing - MEA Forensic Engineers & Scientists
- Thomas Flynn - MEA Forensic Engineers & Scientists
- Brandon Tsuge - MEA Forensic Engineers & Scientists
- Jonathan Lawrence - MEA Forensic Engineers & Scientists
- Gunter P. Siegmund - MEA Forensic Engineers & Scientists
CitationYang, M., Xing, P., Flynn, T., Tsuge, B. et al., "The Effect of Target Features on Toyota’s Autonomous Emergency Braking System," SAE Technical Paper 2018-01-0533, 2018, https://doi.org/10.4271/2018-01-0533.
Data Sets - Support Documents
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- Insurance Institute for Highway Safety U.S. DOT and IIHS Announce Historic Commitment of 20 Automakers to Make Automatic Emergency Braking Standard on New Vehicles http://www.iihs.org/iihs/news/desktopnews/u-s-dot-and-iihs-announce-historic-commitment-of-20-automakers-to-make-automatic-emergency-braking-standard-on-new-vehicles/
- European New Car Assessment Programme 2015
- Insurance Institute for Highway Safety 2013
- Sandner , V. Development of a test target for AEB systems rd International Technical Conference on the Enhanced Safety of Vehicles Seoul, South Korea 27-30 May 2013
- Ono , R. , Ike , W. , and Fukaya , Y. Pre-Collision System for Toyota Safety Sense SAE Technical Paper 2016-01-1458 2016 10.4271/2016-01-1458