基于多变量耦合反馈的电动助力转向模糊PID控制策略研究

The fuzzy PID control strategy of electric power steering based on multivariable coupling feedback

采用动力学分析方法建立了电动助力转向系统的数学模型,基于数学模型建立了电动助力转向系统的离线仿真模型。在分析经典PID控制方法基础上,提出了一种基于多变量耦合反馈的电动助力转向模糊PID控制方法。利用离线仿真和台架实验对所提出的控制方法进行分析,实验结果表明:与传统PID控制方法相比,所提出的多变量耦合反馈模糊PID控制方法可有效提高电动助力转向系统转向操纵的轻便性和稳定性。

The mathematical model of Electric Power Steering （EPS） system is established by using the dynamics analysis method, and the ottline simulation model of EPS system is established based on mathematical models. Muhivariable coupling feedback fuzzy PID control of EPS system is proposed based on analysis of classical PID control method. Using offline simulation and bench tests analysis of the proposed control method. The results show that compared with the traditional PID control, the multivariable coupling feedback fuzzy PID control method has certain advantages in the manipulation of portability and stability.