Abstract
To minimize the auto body’s posture change caused by steering and uneven road, and improve the vehicle’s riding comfort and handling stability, this paper presents an H ∞ robust controller of the active suspension system, which considers the effects of different steering conditions on its dynamic performance. The vehicle’s vibration in the yaw, roll, pitch and vertical direction and the suspension’s dynamic deflection in the steering process are taken into account for the designed H ∞ robust controller, and it introduces the frequency weight function to improve the riding comfort in the specific sensitive frequency bands to human body. The proposed robust controller is testified through simulation and steering wheel angle step test. The results show that the active suspension with the designed robust controller can enhance the anti-roll capability of the vehicle, inhibit the changes of the body, and improve the riding comfort of the vehicle under steering condition. The results of this study can provide certain theoretical basis for the research and application of active suspension system.
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Wang, C., Deng, K., Zhao, W. et al. Robust control for active suspension system under steering condition. Sci. China Technol. Sci. 60, 199–208 (2017). https://doi.org/10.1007/s11431-016-0423-9
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DOI: https://doi.org/10.1007/s11431-016-0423-9