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The moment fluctuations, unbalanced radial force of electric motors, and road surface disturbances have introduced significant vibrations into electric vehicles. To address this issue, a two-degree-of-freedom dynamic model of distributed drive electric vehicles has been established. A Linear Quadratic Regulator (LQR) control strategy is applied to the active suspension system of the vehicle. Three performance indices, including the weighted root-mean-square (RMS) acceleration responses of body acceleration (BA), suspension working space (SWS), and dynamic tire load (TDL), are selected as the objective function to evaluate the performance of active suspension. Simulation results show that, the RMS values of body acceleration, suspension working space and dynamic tire load of the active suspension is reduced by 16.31%, 32.89%, 3.83% respectively by comparing to the passive suspension. These findings demonstrate the superior performance of the active suspension system compared to the passive suspension system.

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Enhancing Ride Comfort in Distributed Drive Electric Vehicle Using LQR Control for Active Suspension Systems

  • 会议论文

  • 发表日期：

    2025年

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  • Bui Van Cuong,
  • Le Van Quynh,
  • The Minh Huong,
  • Nguyen Dinh Tan,
  • Vu Thi Hien

摘要

The moment fluctuations, unbalanced radial force of electric motors, and road surface disturbances have introduced significant vibrations into electric vehicles. To address this issue, a two-degree-of-freedom dynamic model of distributed drive electric vehicles has been established. A Linear Quadratic Regulator (LQR) control strategy is applied to the active suspension system of the vehicle. Three performance indices, including the weighted root-mean-square (RMS) acceleration responses of body acceleration (BA), suspension working space (SWS), and dynamic tire load (TDL), are selected as the objective function to evaluate the performance of active suspension. Simulation results show that, the RMS values of body acceleration, suspension working space and dynamic tire load of the active suspension is reduced by 16.31%, 32.89%, 3.83% respectively by comparing to the passive suspension. These findings demonstrate the superior performance of the active suspension system compared to the passive suspension system.