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Open AccessArticle

Vehicle Cornering Performance Evaluation and Enhancement Based on CAE and Experimental Analyses

Department of Vehicle Engineering, National PingTung University of Science and Technology, Pingtung County 91201, Taiwan
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Appl. Sci. 2019, 9(24), 5428; https://doi.org/10.3390/app9245428
Received: 14 October 2019 / Revised: 2 December 2019 / Accepted: 4 December 2019 / Published: 11 December 2019
(This article belongs to the Section Mechanical Engineering)
A full-vehicle analysis model was constructed incorporating a SLA (Short Long Arm) strut front suspension system and a multi-link rear suspension system. CAE (Computer Aided Engineering) simulations were then performed to investigate the lateral acceleration, yaw rate, roll rate, and steering wheel angle of the vehicle during constant radius cornering tests. The validity of the simulation results was confirmed by comparing the computed value of the understeer coefficient (Kus) with the experimental value. The validated model was then used to investigate the steady-state cornering performance of the vehicle (i.e., the roll gradient and yaw rate gain) at various speeds. The transient response of the vehicle was then examined by means of simulated impulse steering tests. The simulation results were confirmed by comparing the calculated values of the phase lag, natural frequency, yaw rate gain rate, and damping ratio at various speeds with the experimental results. A final series of experiments was then performed to evaluate the relative effects of the cornering stiffness, initial toe-in angle, and initial camber angle on the steady-state and transient-state full-vehicle cornering handling performance. The results show that the handling performance can be improved by increasing the cornering stiffness and initial toe-in angle or reducing the initial camber angle. View Full-Text
Keywords: vehicle suspension system; vehicle cornering performance; understeer coefficient; yaw rate gain; CAE analyses vehicle suspension system; vehicle cornering performance; understeer coefficient; yaw rate gain; CAE analyses
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MDPI and ACS Style

Huang, H.-H.; Tsai, M.-J. Vehicle Cornering Performance Evaluation and Enhancement Based on CAE and Experimental Analyses. Appl. Sci. 2019, 9, 5428.

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