摘要
轮毂式电动汽车高速转向时,不仅要保证车辆转向的稳定性,而且需要电子差速来控制车轮转矩。在轮毂式电动汽车8自由度车辆动力学模型的基础上,考虑车辆高速转向转矩的不协调及车身的不稳定,提出了相应的电子差速控制策略,通过协调内外侧车轮的转矩实现差速功能,同时保证车辆不发生失稳。经过数值仿真验证,提出的电子差速控制策略不仅能有效地根据行驶工况来分配内外侧车轮转矩,将车轮滑移率控制在较低范围内,而且能确保车辆的横向稳定性。
When the wheeled electric vehicle is turning at a high speed,it is not only necessary to ensure the steering stability of the vehicle,but also the electronic differential speed is required to control the wheel torque.Based on the eight-degree-of-freedom vehicle dynamics model of wheeled electric vehicle,and considering the vehicle high-speed steering torque discordant and body instability,the corresponding electronic differential control strategy is proposed,which realizes the differential function by coordinating the inner and outer wheel torque,and at the same time guarantees the vehicle from instability.Through numerical simulation verification,the electronic differential control strategy proposed in this paper can not only effectively allocate the inner and outer wheel torques according to the driving condition,but also control the wheel slip rate in a relatively low range,and ensure the lateral stability of the vehicle.
作者
王东涛
WANG Dong-tao(School of Vehicle Engineering,Hunan Automotive Engineering Vocational College Zhuzhou Hunan 412000,China)
出处
《长春工程学院学报（自然科学版）》
2019年第4期39-42,47,共5页
Journal of Changchun Institute of Technology：Natural Sciences Edition
基金
湖南省教育厅资助科研项目(18C1461)。
关键词
轮毂式电动汽车
高速转向
电子差速控制
车轮转矩
横向稳定性
wheeled electric car
high speed steering
electronic differential control
wheel torque
lateral stability
