吉林大学学报(工学版) ›› 2012, Vol. 42 ›› Issue (01): 7-12.

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Optimization design of vehicle yaw rate gain for steer-by-wire

ZHENG Hong-yu, LI Jun, ZONG Chang-fu, YUAN Kun, ZHAO Jing-che, HOU Jia-feng   

  1. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China
  • Received:2010-11-24 Online:2012-01-01 Published:2012-01-01

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Abstract:

In order to study the variable steering ratio design of Steer-By-Wire (SBR) system, vehicle dynamic model and driver were built. A steady state control strategy for the steering ratio was designed to keep the vehicle yaw rate gain a constant. Under typical vehicle speed, the vehicle yaw rate gain was optimized by genetic algorithm and the steering ratio of SBW system was calculated. The optimization is based on driver-vehicle close-loop, and adopts comprehensive evaluation indexes of vehicle handling and stability, which include lateral trace error index, driver burden index, rollover rate index and slip rate index of vehicle gravity center. Test results show that the proposed control strategy can effectively improve the vehicle maneuverability and reduce the driver burden.

Key words: vehicle engineering, steer by wire system(SBW), genetic algorithm, yaw rate gain, comprehensive evaluation of vehicle handling and stability

CLC Number: 

  • U463.4


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