Multi-modes Torque Distribution Strategy for Distributed Drive Electric Vehicle Based on the Driver Maneuverability Stability Region

doi:10.3901/JME.2025.14.166

Abstract

Abstract: Distributed drive electric vehicles utilize differential torque to generate Direct Yaw Moment (DYM), which effectively improves vehicle maneuverability and controllability. However, DYM is produced by additional longitudinal tire force, which may exceed the tire force constraint region. Misusing DYM could result in hazardous behaviors, such as the vehicle sideslipping in extreme operating conditions. Therefore, it is of high research value to analyze the input boundaries of the optimal DYM and desired driving force to keep the vehicle stable under extreme operating conditions. Considering that both DYM and driving force are related to the driver maneuverability, to this end, a novel concept of driver maneuverability stability region is proposed to describe the feasible operating range of the driver when ensuring vehicle stability, and classifies the vehicle into four modes by distinguishing the response modes of the driver’s desired driving force and the optimal DYM outputted by the upper lateral stability controller. A modal decision criterion is designed based on linear matrix inequality to calculate the boundary of the vehicle stability region and determine the optimal mode. Finally, a multi-modes torque distribution strategy is developed to meet the control requirements under different modes, with full consideration of motor energy saving and motor mechanical fatigue. Simulation and real vehicle experimental results show that the multi-modes torque distribution strategy performs better than the distributed torque distribution strategy and the single-modal torque distribution strategy, which alleviates the contradiction between maneuverability and stability, and ensures the safety and energy saving of the vehicle in handling limit.

Key words: distributed drive electric vehicles, driver maneuverability stability region, torque distribution, linear matrix inequality, vehicle dynamics

CLC Number:

TG156

BAI Xin, SHEN Tong, WANG Fanxun, YIN Guodong, WANG Jinxiang, FANG Ruiqi, LI Xinxiu, LIANG Jinhao. Multi-modes Torque Distribution Strategy for Distributed Drive Electric Vehicle Based on the Driver Maneuverability Stability Region[J]. Journal of Mechanical Engineering, 2025, 61(14): 166-183.

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