NDLI: Simulation study of oscillatory vehicle roll behavior during fishhook Maneuvers

Content Provider	IEEE Xplore Digital Library
Author	Moshchuk, N. Mousseau, C. Norman, K.
Copyright Year	2008
Description	Author affiliation: Gen. Motors, Warren, MI (Moshchuk, N.; Mousseau, C.; Norman, K.)
Abstract	Sustained roll oscillations were observed while performing the National Highway Traffic Safety Administration (NHTSA) fishhook (FH) test on several vehicles. This phenomenon has also been observed on several manufacturers' high center of gravity (CG) vehicles with both solid and independent rear suspensions. Roll oscillation can be accompanied by non-convergent yaw, heave, and pitch. A study was initiated to quantify the influence of vehicle inertia, suspension, powertrain, and tire characteristics on the FH vehicle response. Design of experiments (DOE) methods were used to quantify the main effects and the significant interactions between vehicle design variables. The CarSim program was used to simulate the vehicle dynamics and the iSIGHT program was used to automate the DOE analysis. Summary findings show that tire lateral force high slip behavior influences yaw instability. This alone is not sufficient for developing diverging roll oscillations. Additionally, results show that suspension jounce travel and bumper rate, in conjunction with tire overturning moment and non-positive tire cornering stiffness, influence yaw, roll, and pitch stability. Simulation results suggest that the primary cause of roll oscillations is the transfer of some energy from the longitudinal mode into the roll and heave modes. This effect can also be influenced by other factors like the distance between the CG and the roll axis, yaw-roll cross product of inertia, for example. Also described is optimization of FH performance (minimization of wheel lift and roll oscillations) with respect to some suspension characteristics.
Starting Page	3933
Ending Page	3940
File Size	2008501
Page Count	8
File Format	PDF
ISBN	9781424420780
ISSN	07431619
DOI	10.1109/ACC.2008.4587107
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-06-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	American Automatic Control Council(AACC)
Subject Keyword	Suspensions Tires US Department of Transportation Character generation US Department of Energy Performance evaluation Testing Road vehicles Vehicle safety Manufacturing
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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