电动汽车电驱动系统建模及控制策略研究
Research on Modeling and Control Strategy of Electric Drive System of Electric Vehicle
冶存良 1杨贺绪 1郝杰 2巩云鹏1
作者信息
- 1. 宁夏理工学院机械工程学院,宁夏 石嘴山 753000;东北大学机械工程与自动化学院,辽宁 沈阳 110819
- 2. 内蒙古一机集团宏远电器股份有限公司,内蒙古 包头 014030
- 折叠
摘要
针对纯电汽车电驱动系统因受负载端转动惯量时变特性及传动部件中存在柔性的影响,导致电机端转矩波动及传动精度降低的问题,这里提出了一种通过加入陷波滤波器与前馈调整增益进行调整的控制策略.相比传统方法,此方法需要配置的参数更少,控制的精度更高.首先对电驱动系统建立了基于双惯量模型的动力学方程,并分析了不同负载转动惯量下系统的频率响应.依据建立的电驱动系统双惯量模型,设计了两种陷波滤波器.对比加入陷波滤波器后系统的参数变化和响应曲线,选择了一种效果更好的陷波器.最后,对加入陷波器后的控制系统,通过前馈控制和调整增益进行改进.给出了改进后控制策略的理论分析过程与参数设计方法,并进行了数值仿真.结果表明,所提出的方法可以减弱纯电汽车的电驱动系统因传动柔性与电机负载端转动惯量时变特性导致的系统扭振及传动精度降低的问题.
Abstract
The electric drive system of pure electric vehicle is affected by the time-varying characteristics of moment of inertia at the load end and the flexibility in the transmission parts,which leads to the motor end torque fluctuation and transmission preci-sion reduction.A control strategy is proposed by adding notch filter and feedforward adjustment gain.Compared with the tradi-tional method,this method needs to configure fewer parameters and has higher control precision.Firstly,the dynamic equation of the electric drive system based on the Two-inertia system is established,and the frequency response of the system under different load moment of inertia is analyzed.Two kinds of notch filters are designed according to the Two-inertia system of electric drive system.By comparing the parameter change and response curve of the system with the notch filter,a better notch filter is selected.Finally,the control system with notch is improved by feedforward control and gain adjustment.The theoretical analysis process and parameters design method of the improved control strategy are given,and a series of simulations is carried out.The results show that the proposed method can reduce the torsional vibration and transmission precision of the electric drive system of pure electric vehicle due to the transmission flexibility and the time-varying characteristics of the moment of inertia at the load end of the motor.
关键词
电动车辆/电驱动系统/双惯量系统/负载时变/陷波滤波器Key words
Electrical Vehicle/Electric Driving System/Two-Inertia System/Dynamic Performance Analysis/Notch Filter引用本文复制引用
基金项目
宁夏回族自治区自然科学基金(2022AAC03338)
出版年
2024
NETL
NSTL
维普
万方数据