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Automotive Engineering ›› 2025, Vol. 47 ›› Issue (4): 724-733.doi: 10.19562/j.chinasae.qcgc.2025.04.013

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Study on Fault-Tolerant Control Strategy of Composite Steering for Heavy Load Vehicles with Distributed Electric Drive

Junqiu Li1(),Shengyue Chen1,Jianwen Chen2,Yongxi Yang1,Xiaohan Li1   

  1. 1.School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081
    2.Jianglu Electromechanical Group Co. ,Ltd. ,Xiangtan 411100
  • Received:2024-06-02 Revised:2024-10-17 Online:2025-04-25 Published:2025-04-18
  • Contact: Junqiu Li E-mail:lijunqiu@bit.edu.cn

Abstract:

Distributed electrically-driven heavy-duty vehicles achieve compound steering through the differential between the steering assist motor and the wheel-end drive motor. By means of coordinated control of multiple motors, various active safety control functions are realized and the driver's operational burden is reduced. For the driving safety issues brought about by the failure of the drive motor and the steering assist motor, in this paper a fault-tolerant control strategy encompassing mode switching and fault-tolerant torque distribution is proposed. The proposed mode-switching strategy, based on the vehicle pose information, introduces in the yaw rate residual function as the switching condition for the fault-tolerant mode. The proposed fault-tolerant torque distribution strategy takes into account of the output redundancy and the vehicle's stability to solve for the target output torque of the drive motor and the steering assist motor. Finally, a hardware-in-the-loop simulation platform is established to verify the effectiveness and real-time performance of the control strategy.

Key words: distributed drive, compound steering, actuator failure, fault-tolerant control