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Automotive Engineering ›› 2021, Vol. 43 ›› Issue (5): 721-729.doi: 10.19562/j.chinasae.qcgc.2021.05.011

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Stability Control of Distributed Driven Electric Vehicle Based on Phase Plane

Longfei Zhong,Yuhui Peng(),Ming Jiang   

  1. School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350116
  • Received:2020-10-14 Revised:2021-01-04 Online:2021-05-25 Published:2021-05-18
  • Contact: Yuhui Peng E-mail:pengyuhui@fzu.edu.cn

Abstract:

To improve the handling stability of a distributed driven electric vehicle, a driving stability control strategy based on phase plane method is proposed. Firstly, a two degree?of?freedom nonlinear model for vehicle simulation is established to obtain the boundary model of phase plane stability region for vehicle centroid slip angle with different tire?road friction coefficients. Secondly, a regional controller based on the phase plane of centroid sideslip angle is designed to achieve the stability of vehicle. When the vehicle runs in the stability region, the yaw momentum is determined by the fuzzy neural network controller to make the vehicle follow the target variable. When the vehicle runs out of the stability region, the yaw momentum is determined by a combined controller of instability and fuzzy neural network to restore the stability of the vehicle. Finally, by use of Simulink and CarSim software, the stability control method is verified by simulation and on?road experiment under the condition of snaking driving around pile and double line change. The experimental results reveal the feasibility and effectiveness of the proposed control strategy.

Key words: electric vehicle, driving stability, phase plane, distributed driven, fuzzy neural network, regional controner