Browse > Article

A Study on Improvement of Crash Discrimination Performance for Offset and Angular Crash Events Using Electronic X-Y 2-Axis Accelerometer  

박서욱 (한국과학기술원 기계공학과)
전만철 (㈜ 현대 오토넷 Safety Electronics팀)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.11, no.1, 2003 , pp. 128-136 More about this Journal
Abstract
In today's design trend of vehicle structure, crush zone is fiequently reinforced by adding a box-shaped sub-frame in order to avoid an excessive deformation against a high-speed offset barrier such as EU Directive 96/97 EC, IIHS offset test. That kind of vehicle structure design results in a relatively monotonic crash pulse for airbag ECU(Electronic Control Unit) located at non-crush zone. As for an angular crash event, the measured crash signal using a single-axis accelerometer in a longitudinal direction is usually weaker than that of frontal barrier crash. Therefore, it is not so easy task to achieve a satisfactory crash discrimination performance for offset and angular crash events. In this paper, we introduce a new crash discrimination algorithm using an electronic X-Y 2-axis accelerometer in order to improve crash discrimination performance especially for those crash events. The proposed method uses a crash signal in lateral direction(Y-axis) as well as in longitudinal direction(X-axis). A crash severity measure obtained from Y-axis acceleration is used to improve the discrimination between fire and no-fire events. The result obtained by the proposed measure is logically ORed with an existing algorithm block using X-axis crash signal. Simulation and pulse injection test have been conducted to verify the performance of proposed algorithm by using real crash data of a 2,000cc passenger vehicle.
Keywords
Offset deformable barrier(ODB); NCAP(New Car Assessment Program); ESP(Electronic single-point sensing system); Crash severity; R-TTF(Required time-to-fire); Pulse injection method;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Problems in Design and Engineering of Airbag Systems /
[ D. S. Breed;V. Castelli ] / SAE 880724
2 /
[ NHTSA ] / FMVSS 208
3 New Crash Discrimination Algorithm and Accelerometer Locations /
[ Hyun-yong Jeong;Young-Hak Kim ] / Trans. of the Korean Society of Automotive Engineers   과학기술학회마을
4 Determination of Crush Zone Severity Using a Ball-In-Tube and Accelerometer Sensing System (BASS) /
[ T. Gioutsos;D. Tabar ] / SAE 1999-01-1326
5 /
[ EEVC ] / EU Directive 96/79 EC
6 Dual Threshold Airbag Control Algorithm by using Seat-belt Status Detection /
[ Seo Wook Park;Man Cheol Jeon ] / Autumn Conference Proceedings of the Korean Society of Automotive Engineers
7 Expanding Restraint Sensing System Discrimination /
[ C. Boran(et al.) ] / 4th Internal Symposium and Exhibition on Sophisticated Car Occupant Safety Systems
8 A Study on the Airbag Crash Recognition Algorithm for Vehicle Impact Modes and Speeds /
[ Kian Sung;Changsik Lee ] / Trans. of the Korean Society of Automotive Engineers   과학기술학회마을
9 Crash Discrimination Algorithm for Airbag Electronic Single-point Sensor /
[ Seo Wook Park;Man Cheol Jeon ] / Trans. of the Korean Society of Automotive Engineers