纯电动车辆传动系统扭振模糊PID主动抑制仿真

Active Damping of the Torsional Vibration in Electrical Vehicle Drive Train Under Compact Condition with a Fuzzy-PID Controller

基于纯电动汽车传动系统集中质量-弹性轴动力学模型,分析了输入转矩突变工况下传动系统的冲击振动。将传动系统扭振响应转化为车辆加速度,以抑制车辆加速度波动为控制目标,采用PID控制器对传动系统扭转振动进行主动抑制。为提高扭振控制器对模型参数变化和建模误差的鲁棒性,采用模糊控制对PID控制器参数进行了实时整定。设计低通滤波器对车辆加速度进行滤波,以得到了车辆加速度的跟踪目标,并通过理论分析给出了该低通滤波器的解析表达式。仿真结果表明,所提出的方法能够抑制电动车辆传动系统冲击振动,对传动系统中主要非线性因素和参数变化有较好的鲁棒性,且能消除电机高频转矩波动对车辆性能的影响,为纯电动车辆扭振控制器设计提供了参考。

The mechanism of torsional vibration of the drivetrain in electrical automotive caused by the sudden change of the drive motor torque is revealed through a concentrated mass-elastic shaft model. The torsional vibration response of the transmission system is converted into vehicle acceleration to suppress the vehicle acceleration fluctuation as the control target,and a PID controller is used to actively suppress the torsional vibration of the transmission system. In order to improve the robustness of the torsional-vibration controller to model parameter variation and modeling error,fuzzy control strategy is used to set the parameters of the PID controller in real time. The tracking target of vehicle acceleration is obtained by filter vehicle acceleration with a low-pass filter which general analytic form is provided through theoretically analysis. The simulation results show that the method proposed in this paper can suppress the torsional vibration under the impact condition and have a good robustness to the main nonlinear factors and parameter variation,the high frequency torque fluctuation of the motor also can be eliminated through the active damping strategy. it giving a good reference for the designing of the controller to suppress torsional vibration of electrical vehicle.