吉林大学学报(工学版) ›› 2009, Vol. 39 ›› Issue (06): 1420-1424.

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Mixed H2/H&infin|control for enhancing anti-interference performance of EPS system

ZHAO Wan-zhong1,LIN Yi2,SHI Guo-biao2   

  1. 1.Department of Automotive Engineering, Nanjing University of Aeronautics and Astronautics, Nangjing 210016, China;2.School of Vehicular Engineering,Beijing Institute of Technology,Beijing 100081,China
  • Received:2007-07-04 Online:2009-11-01 Published:2009-11-01

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Abstract:

According to the requirements of the electric bus on the electric power steering(EPS), a recirculating ball type EPS system was designed and its dynamic model was established.Because of the existence of system uncertainties in modeling, signal disturbance,sensor noise, considering the requirements on the system robustness and the dynamic performance, a mixed H2/H∞ controller was designed and optimized by the mixed weighted index optimization.The simulation results showed that this optimal control method could attenuate the random road excitation,torque sensor measurement noises and disturbances, reduce oscillations that might occur in the steering column,provide satisfied road feeling for drivers.The simulation results were verified by the bench test.The test results showed that the mixed H2/H∞ controller for the recirculating balltype EPS system is feasible and effective,and it improves the vehicle steering and handling stability.

Key words: vehicle engineering, pure electric power bus, electrical power steering, recirculating ball-type, mixed H2/H∞

CLC Number: 

  • U461.4
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