Shimmy model for electric vehicle with independent suspensions

A 5-degrees-of-freedom shimmy model is established to analyse the dynamic responses of an electric vehicle with independent suspensions. Tyre elasticity is considered by means of Pacejka’s magic formula. Under the nonslip assumption for the leading contact point, tyre–road constraint equations are d...

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Bibliographic Details
Published in:Proceedings of the Institution of Mechanical Engineers. Part D, Journal of automobile engineering Journal of automobile engineering, 2018-02, Vol.232 (3), p.330-340
Main Authors: Mi, Tian, Stepan, Gabor, Takacs, Denes, Chen, Nan
Format: Article
Language:English
Subjects:
Automotive parts
Computer simulation
Constraint modelling
Economic models
Elasticity
Electric contacts
Electric vehicles
Hopf bifurcation
Initial conditions
Simulation
Tires
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Summary:A 5-degrees-of-freedom shimmy model is established to analyse the dynamic responses of an electric vehicle with independent suspensions. Tyre elasticity is considered by means of Pacejka’s magic formula. Under the nonslip assumption for the leading contact point, tyre–road constraint equations are derived. Numerical simulation is conducted with different structural parameters and initial conditions to observe the shimmy phenomenon. Simulation results indicate that Hopf bifurcation occurs at a certain vehicle forward speed. Moreover, suspension structural parameters, such as caster angle, affect wheel shimmy. The linearized model of the system presents the stability boundaries, which agree with the simulation results. The results of this study not only provide a theoretical reference for shimmy attenuation, but also validate the effectiveness of the provided model, which can be used in further dynamic analysis of vehicle shimmy.
ISSN:0954-4070
2041-2991
DOI:10.1177/0954407017701282