吉林大学学报(工学版) ›› 2011, Vol. 41 ›› Issue (6): 1532-1536.

• paper • Previous Articles     Next Articles

H∞ control for electric power steering road feel based on frequency shaping

WANG Chun-yan1,ZHAO Wan-zhong1,2,YU Lei-yan3   

  1. 1.College of Energy &|Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China|2.State Key Laboratory of Automotive Safety and Energy, Tsinghua University,Beijing 100084,China|3.College of Mechanical and Electronic Engineering|China University of Petroleum|Dongying 257061|China
  • Received:2010-03-02 Online:2011-11-01 Published:2011-11-01

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Abstract:

To deal with the fact that there are uncertainties such as disturbance signals, sensor noises,etc., in the electric power steering(EPS) system, and the demand of the system to the robustness and the dynamic performance, a road feel model was built for the EPS system and an H∞ controller was designed for the EPS road feel. The output performance of the system was shaped by selection of the frequency weighting function, and a simulation was performed in the frequency domain. The simulation results showed that compared with the traditional PID controller, the H∞ controller for the EPS road feel can provide a better system robustness, the frequency weighted EPS can acquire better road informations at low frequencies, can attenuate the noises and disturbances from the road at high frequencies, thus insure the driver to get a better road feel.

Key words: vehicle engineering, frequency weighting function, electric power steering, H∞ control, road feel

CLC Number: 

  • U461.4
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