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Measuring and Modeling Suspensions of Passenger Vehicles
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 08, 2013 by SAE International in United States
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Numerical parameters describing suspension stiffness and damping are required for 3D simulation of vehicle trajectories, but may not be available. This paper outlines a simple, portable method of measuring these properties with a coefficient of variation of 5% on stiffness. 24 of 26 vehicles tested were significantly stiffer in roll than pitch, complicating analyses with models that don't include anti-roll. Suspension parameters did not correlate with static wheel load distribution, and damping coefficient did not correlate with natural frequency.
Computer simulations of the speed required to initiate rollover in an S-curve were highly sensitive to the suspension parameters used. When pre-impact tire marks and rollover distance were considered, the simulations became almost insensitive to suspension parameters.
CitationHeinrichs, B., Goulet, J., Fix, R., and King, M., "Measuring and Modeling Suspensions of Passenger Vehicles," SAE Technical Paper 2013-01-0774, 2013, https://doi.org/10.4271/2013-01-0774.
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