中文摘要：

首先对电动助力转向系统（EPS）进行了建模、分析及合理的简化。根据该系统特性,选择基于H∞的控制方法。在对S/T奇异值曲线的深入观察和研究的基础上,提出一种根据系统频域关键参数先构造闭环函数然后反推出系统控制器的方法。EPS系统频谱分析及干扰和模型参数摄动下的仿真结果表明,该方法设计的控制器简单有效,具有很好的鲁棒稳定性和鲁棒性能。

英文摘要：

The analysis,modeling,simplifying were carried out with an electric power steering system.According the characteristic of the EPS,the method based on H∞ was introduced.Based on the analysis of S/T curves of singular values,a kind of controlling method was proposed that the controller was concluded according to the closed-loop function of system constructed by parameters in frequency domain.Spectral analysis of EPS system and simulation with disturbances and parameters perturbation demonstrate that the method is concise and effective,and the controller has excellent robustness and robust stability.