Analysis of handling performance based on simplified lateral vehicle dynamics |
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Authors: | J Kim |
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Institution: | (1) Department of Vehicle Dynamics Research Team, Hankook Tire Co., LTD., R&D Center, 23-1 Jang-dong, Yuseong-gu, Daejeon, 305-725, Korea |
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Abstract: | In this article, the analysis methods for vehicle handling performance are studied. Using simple models, dynamic characteristic
parameters such as yaw, natural frequency, and the damping coefficient of a vehicle can be theoretically formulated. Here,
the vehicle is simplified by a bicycle (single-track) model, and the tire is modeled by an equivalent cornering stiffness
and first order lag. From the experimental road data, the tire model parameters (equivalent cornering stiffness and time lag
constant) are extracted. These parameters are then inserted into the theoretically formulated equations of dynamic characteristic
parameters. For the purpose of validating the efficiency of the suggested methods, experimental road tests (where the cars
have different handling performances) are performed. The results show that vehicle handling performance can be sufficiently
represented by the suggested dynamic characteristic parameters. So, it is concluded that the proposed method has practical
use for the development of new cars or for the comparison of similar cars since the evaluations of the vehicle handling performance
can be efficiently determined by the suggested dynamic characteristic parameters. |
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Keywords: | Bicycle model First order lag tire model Equivalent cornering stiffness Damping coefficient |
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