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This study presents the application of a Linear Quadratic Regulator (LQR) controller aimed at enhancing the motion smoothness of passenger vehicles through the utilization of an active suspension system. In the study, the authors focused on increasing the vertical oscillation performance of the vehicle employing a half-vehicle dynamic model as the basis for analysis. The LQR controller is specifically designed to optimize the performance of the active suspension system and enhance the driving comfort for both passengers and cargo. Simulation results indicate that the vertical displacement of the vehicle body, the acceleration of the vehicle body and the angle of the yaw achieved enhancements of approximately 20% compared to traditional passive suspension systems. The findings of this paper contribute to the foundational understanding of control theory for the development of modern automobile suspension systems.

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Applying LQR Controller to Active Suspension System to Increased Oscillation Performance for Passenger Cars

  • 会议论文

  • 发表日期：

    2026年

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  • Nguyen Tien Dung,
  • Vu Dinh Hoan,
  • Le Bao Viet

摘要

This study presents the application of a Linear Quadratic Regulator (LQR) controller aimed at enhancing the motion smoothness of passenger vehicles through the utilization of an active suspension system. In the study, the authors focused on increasing the vertical oscillation performance of the vehicle employing a half-vehicle dynamic model as the basis for analysis. The LQR controller is specifically designed to optimize the performance of the active suspension system and enhance the driving comfort for both passengers and cargo. Simulation results indicate that the vertical displacement of the vehicle body, the acceleration of the vehicle body and the angle of the yaw achieved enhancements of approximately 20% compared to traditional passive suspension systems. The findings of this paper contribute to the foundational understanding of control theory for the development of modern automobile suspension systems.