基于H_∞混合灵敏度控制的EPS操纵稳定性研究  

Study on Handling Stability of Vehicle with Electric Power Steering System Based on H_∞ Mixed Sensitivity Control

作　　者：臧怀泉[1] 耿佳[1] 赵保军[2] 

机构地区：[1]燕山大学河北省工业计算机控制工程重点实验室,河北秦皇岛066004 [2]北京理工大学信息与电子学院,北京100081

出　　处：《北京理工大学学报》2012年第12期1252-1257,共6页Transactions of Beijing Institute of Technology

基　　金：国家"八六三"计划项目(2008AA8012320B)

摘　　要：针对电动助力转向系统存在的传感器噪声、路面干扰、参数摄动等不确定性,以及转向系统的多控制目标要求,设计了一种基于H_∞混合灵敏度控制方法的EPS系统电流控制器.建立了能够体现装配EPS系统汽车助力特性和整车操纵稳定性能的综合模型,从而使评价EPS汽车综合操纵性能的指标更加全面和符合实际.仿真与分析结果表明,所设计的控制器不仅能够保证满意的路感、良好的操纵稳定性能,而且可以有效抑制传感器噪声和路面干扰的影响,从而提高了系统的性能鲁棒性和稳定鲁棒性.A current controller of electric power steering （EPS） system was designed using H∞ mixed sensitivity control method in view of the performance demands of steering system under the existence of uncertainties such as torque sensor noise, road disturbance and parameter change. A synthesized model has been established to reflect the performance of EPS system and the vehicle handling stability. The simulation results indicate that the designed control system for EPS shows a satisfactory road feeling, and a favorable handling performance. It also could effectively restrain the noises and disturbances caused by system uncertainties and road conditions. Consequently, the robustness of handling stability could be enhanced.

关 键 词：电动助力转向(EPS)系统 路感 操纵稳定性 H∞混合灵敏度控制 

分 类 号：U461.6[机械工程—车辆工程]