Strategy of Acceleration Torque Compensation Control for Electric Vehicle
Shujiang Chen · Journal of Highway and Transportation Research and Development · 2012
In order to solve the problem of motor output power shortage of electric vehicle during urgent acceleration and start,which is difficult to satisfy the demand of driver for the need of power,an acceleration torque compensation control strategy was proposed based on analysis of the torque characteristics during vehicle acceleration.In the strategy,basic driving torque could be determined on the basis of linear stationary driving torque control strategy.Fuzzy control algorithm was adopted to develop a driver intention expression controller,which utilized the accelerator pedal position and its change rate as the input,and the target incremental torque as the output.Then,the acceleration torque compensation algorithm was designed to calculate compensation torque.Finally,the torque requirement of the driver was determined and the command of torque control was sent to motor driving system.The simulation result shows that the control strategy could significantly improve the acceleration performance of electric vehicles.