分布式电动汽车驱动力分配控制方法研究  

Research on Driving Force Distribution Control Method of Distributed Electric Vehicles

作　　者：彭晓燕[1] 邢星飞 崔庆佳 黄晶[1] Peng Xiaoyan;Xing Xingfei;Cui Qingjia;Huang Jing(College of Mechanical and Vehicle Engineering,Hunan University,Changsha 410082;CATARC Automotive Test Center(Tianjin)Co.,Ltd.,Tianjin 300300)

机构地区：[1]湖南大学机械与运载工程学院,长沙410082 [2]中汽研汽车检验中心(天津)有限公司,天津300300

出　　处：《汽车工程》2022年第7期1059-1068,共10页Automotive Engineering

基　　金：国家自然科学基金(51875049);湖南省自然科学基金(2020JJ4191);湖南省重点研发项目(2020SK2099)资助。

摘　　要：针对驱动电机正常和故障工况下分布式电动汽车的操纵稳定性问题,提出了一种结合前轮转向和驱动力重构的驱动力分配控制方法。首先基于横摆角速度与质心侧偏角设计滑模加权控制器,计算所需的附加横摆力矩;再分别建立电机正常和故障工况驱动力优化分配模型。其中,针对故障工况下驱动电机输出能力的限制,通过协同前轮转向来补偿横摆力矩。然后,基于二次规划理论求解最优驱动力分配值。最后利用Carsim和Simulink联合仿真,验证了提出的协调控制方法的有效性。结果表明,该方法可充分利用分布式驱动的冗余特性,确保分布式电动汽车在驱动电机正常与故障工况下均可满足操纵稳定性要求。Aiming at the handling and stability problems of distributed electric vehicles under normal and faulty driving motor conditions,a driving force distribution control method combining front wheel steering and driving force reconstruction is proposed.Firstly,a sliding mode weighted controller is designed based on yaw rate and the side slip angle of mass center to calculate the additional yaw moment required;and the optimal distribution model of driving force for the normal and faulty conditions of drive motor is established respectively,in which,the yaw moment is compensated by coordinating the steering of front wheels for limiting the output capacity of drive motor in faulty conditions.Then the optimal driving force distribution value is solved out based on quadratic programming theory.Finally,a Carsim/Simulink joint simulation is conducted to verify the effectiveness of the coordinated control method proposed.The results show that this method can make full use of the redundant characteristics of distributed drives to ensure the distributed electric vehicles can meet the requirements of handling stability under normal and faulty driving motor conditions.

关 键 词：分布式电动汽车 驱动力分配 驱动电机故障 操纵稳定性 

分 类 号：U469.72[机械工程—车辆工程]