摘要
针对双电机独立驱动电动车电子差速问题进行了研究,根据ACKERMANN汽车转向模型和电机的特性及双电机独立驱动的特点,提出了以2个驱动轮的相对滑转率(δ)为控制变量进行调速控制的方法,并确定了δ的临界值,在δ≤2%时,采用自适应调节的电子差速模式,实现电子差速功能;在δ>2%时,采用闭环有差反馈式调压系统调节,使δ≤2%,实现电子差速的自调节功能。仿真模拟结果表明,此电子差速控制策略能够保证电动车在直线和转向行驶达到差速目的,并能以最佳的驱动力行驶。
Electronic differential （ED） system for a double-motor individual-drive electric vehicle is discussed in the paper. According to the ACKERMANN steering model, the motor characteristics and the features of independent drive by dual motors, the paper puts forward the speed regulating method with the relative slip ratio （S） of each driving wheel as control variable and finally determines the S critical value. When the ratio is less than or equal to 2%, the function of ED can be realized by using the mode of adaptive ED. When the relative slip ratio is larger than to 2%, closed loop feedback control system is used to decrease the value of ~ to 2% or less than 2% so as to realize the function of ED and adaptive adjustment. The simulation results show that the proposed strategy can maintain the stability of the vehicle either on a straight line or on a curve, and make sure the vehicle has better driving performance.
出处
《汽车工程师》
2011年第12期28-30,共3页
Automotive Engineer
基金
山东省科技攻关计划资助项目(2010GGX10725)
关键词
双电机驱动
电子差速
自适应差速
相对滑转率
Dual motor driving
Electronic differential
Adaptive differential
Relative slip ratio
