A new semi-active suspension control strategy through mixed H_2/H_∞ robust technique  

作　　者：郑玲 李以农 陈兵奎 

机构地区：[1]State Key Laboratory of Mechanical Transmission,Chongqing University

出　　处：《Journal of Central South University》2010年第2期332-339,共8页中南大学学报（英文版）

基　　金：Project(50775225) supported by the National Natural Science Foundation of China;Projects(CSTC, 2008AC6097, 2008BA6025) supported by National Natural Science Foundation of Chongqing, China

摘　　要：A new semi-active suspension control strategy through mixed H2/H∞ robust technique was developed due to its flexibility and robustness to model uncertainties.A full car model with seven degrees of freedom was established to demonstrate the effectiveness of the new control approach.Magneto-rheological(MR) dampers were designed,manufactured and characterized as available semi-active actuators in the developed semi-active suspension system.The four independent mixed H2/H∞ controllers were devised in order to perform a distributed semi-active control system in the vehicle by which the response velocity and reliability can be improved significantly.The performance of the proposed new approach was investigated in time and frequency domains.A good balance between vehicle's comfort and road holding was achieved.An effective and practical control strategy for semi-active suspension system was thus obtained.This new approach exhibits some advantages in implementation,performance flexibility and robustness compared to existing methods.A new semi-active suspension control strategy through mixed H2/H∞ robust technique was developed due to its flexibility and robustness to model uncertainties. A full car model with seven degrees of freedom was established to demonstrate the effectiveness of the new control approach. Magneto-rheological （MR） dampers were designed, manufactured and characterized as available semi-active actuators in the developed semi-active suspension system. The four independent mixed H2/H∞ controllers were devised in order to perform a distributed semi-active control system in the vehicle by which the response velocity and reliability can be improved significantly. The performance of the proposed new approach was investigated in time and frequency domains. A good balance between vehicle＇s comfort and road holding was achieved. An effective and practical control strategy for semi-active suspension system was thus obtained. This new approach exhibits some advantages in implementation, performance flexibility and robustness compared to existing methods.

关 键 词：mixed H2/H∞ control semi-active suspension magneto-rheological （MR） damper linear matrix inequality （LMI） 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]