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Yaw Moment Control Strategy for Four Wheel Side Driven EV

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Abstract

When four wheel side driven EV travals in steering or changes lanes in high speed, the vehicle is easy to side-slip or flick due to the difference of wheel hub motor and a direct effect of vehicle nonlinear factors on vehicle yaw motion, which would affect vehicle handling and stability seriously. To solve this problem, a joint control strategy, combined with the linear programming algorithm and improved sliding mode algorithm, which combines the exponential reaching law and saturation function was proposed. Firstly, the vehicle dynamics model and the reference model according with the structure and driving characteristics of four wheel side driven EV were set up. Then, introduced the basic method of the improved sliding mode variable structure control and complete the sliding mode variable structure controller design basic on vehicle sideslip angle and yaw velocity.The controller accomplish optimal allocation of vehicle braking force through a linear programming algorithm, according to yaw moment produced by the vehicle motion state. Single lane driving simulation results show that the proposed control strategy can not only control vehicle sideslip angle and yaw velocity well, but also accomplish good controlling of the vehicle yaw moment, so as to significantly improve the handling and stability of vehicle.

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Authors and Affiliations

  1. Department of Automotive Engineering, Hunan Mechanical and Electrical Polytechnic, Changsha, 410151, China

    Zhu Zhao

  2. Department of Automotive and Mechanical Engineering, Changsha University of Science and Technology, Changsha, 410004, China

    Zhu Zhao & Du Ronghua

Authors
  1. Zhu Zhao
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  2. Du Ronghua
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Correspondence to Zhu Zhao.

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Zhao, Z., Ronghua, D. Yaw Moment Control Strategy for Four Wheel Side Driven EV. Aut. Control Comp. Sci. 52, 32–39 (2018). https://doi.org/10.3103/S0146411618010091

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  • DOI: https://doi.org/10.3103/S0146411618010091

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