Impact Reduction Method for Electric Vehicle Dual-mode Coupling Drive System with Modes Shift

doi:10.3901/JME.2018.08.165

Abstract

Abstract: The dual-mode coupling drive system integrates the functions of the centralized drive system and the distributed drive system, which can greatly improve the electric vehicle dynamics performance, but the vehicle ride comfort is decreased due to the drive modes switch. In order to solve the above problem, the modes shift impact reduction method based on an electromechanical coupling control is proposed and verified. Firstly, the transmission system model is built based on the unique configuration of the dual-mode coupling drive system, and the dynamics mechanism of reduction modes shift impact by the addition of torsional dampers is revealed. Then, based on the optimization result of the system parameters, the angular displacement curve of the actuator drive motor is obtained by considering the limit of time and impact of the modes shift. At last, based on a predictive function controller that is designed for the modes shift, the angular displacement tracking control of the actuator motor is achieved and the modes shift is smoothly completed. The research shows that, on the premise of ensure the modes shift time, the impact of the dual-mode coupling drive system can be effectively reduced by the electromechanical coupling control with combining the torsional damper with the predictive functional controller, and the vehicle ride comfort indicators are well met.

Key words: dual-mode coupling drive, electric vehicle, mode shift, predictive function control, torsional damper

CLC Number:

U469

ZHANG Lipeng, GU Dingjie, QI Bingnan, DONG Chuangchuang. Impact Reduction Method for Electric Vehicle Dual-mode Coupling Drive System with Modes Shift[J]. Journal of Mechanical Engineering, 2018, 54(8): 165-176.

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