Journal
VEHICLE SYSTEM DYNAMICS
Volume 53, Issue 8, Pages 1172-1189Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00423114.2015.1028414
Keywords
handling and stability; electric vehicle; optimal torque distribution
Categories
Funding
- Automotive Partnership Canada
- Ontario Research Fund
- General Motors
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In this paper, an optimal torque distribution approach is proposed for electric vehicle equipped with four independent wheel motors to improve vehicle handling and stability performance. A novel objective function is formulated which works in a multifunctional way by considering the interference among different performance indices: forces and moment errors at the centre of gravity of the vehicle, actuator control efforts and tyre workload usage. To adapt different driving conditions, a weighting factors tuning scheme is designed to adjust the relative weight of each performance in the objective function. The effectiveness of the proposed optimal torque distribution is evaluated by simulations with CarSim and Matlab/Simulink. The simulation results under different driving scenarios indicate that the proposed control strategy can effectively improve the vehicle handling and stability even in slippery road conditions.
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