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Automotive Engineering ›› 2025, Vol. 47 ›› Issue (11): 2202-2211.doi: 10.19562/j.chinasae.qcgc.2025.11.014

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Research on Unbiased Full State Feedback Path Tracking Control Method for Four-Wheel Steering Vehicles for the Extreme Sideslip Scenario

Guoying Chen1(),Jiahao Dong2,Xinyu Wang2,Jiaqi Wang2,Lei Lu3,Lun Li3   

  1. 1.Jilin University,National Key Laboratory of Automotive Chassis Integration and Bionics,Changchun 130022
    2.College of Automotive Engineering,Jilin University,Changchun   130022
    3.China FAW Co. ,Ltd. ,Changchun   130000
  • Received:2024-11-30 Revised:2025-01-07 Online:2025-11-25 Published:2025-11-28
  • Contact: Guoying Chen E-mail:cgy-011@163.com

Abstract:

For the problem of non-convergence of lateral and heading errors of path tracking in extreme lateral slip scenarios of the motion control method widely used in four-wheel steering vehicles based on feedback mechanism, a control method integrating unbiased feedforward and hysteresis-corrected full-state feedback is proposed. Firstly, a full-state feedback controller considering path preview and hysteresis correction is designed, and based on this, a closed-loop analysis of the lateral motion of four-wheel steering vehicles is conducted. The unbiased feedforward steering angle with zero lateral and heading errors in the steady state is deduced, thereby establishing the control algorithm combining unbiased feedforward and hysteresis-corrected full-state feedback. Finally, the proposed control algorithm is applied in real vehicle tests and compared and verified with the pure feedback control algorithm and the proportional feedforward plus full-state feedback control algorithm. The results show that the proposed control algorithm reduces the maximum lateral error by 26.6% and 20.5% respectively, and the maximum heading error by 21.9% and 15.7% respectively in the high-curvature working condition. In the high-speed serpentine working condition, the maximum lateral error is reduced by 29.9% and 15.6% respectively, and the maximum heading error is reduced by 37.8% and 32% respectively.

Key words: four-wheel steering vehicles, extreme sideslip, path tracking, full-state feedback, unbiased feedforward