ctive suspension sliding mode control based on road excitation preview range switching

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (13) : 237-247.

KOU Farong, CHEN Yixiao, ZHANG Xinqian, WANG Qianlei, LIU Pengtao

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Abstract

Aiming at the matching of suspension control force and actual road excitation under different driving conditions, a sliding mode control method of active suspension based on switching preview range of pavement excitation was designed. The road preview system composed of lidar, inertial measurement unit and GPS (Global Positioning System) was set up to collect the original road information and complete the data coordinate transformation; the mathematical model of wheel trajectory was established, and the road surface excitation identification method of switching preview range was designed according to the mathematical model; taking the ideal sky-hook model as the reference model, the sliding mode controller of active suspension was designed; the dynamic performance of suspension under linear and steering conditions was simulated and analyzed. The simulation results show that under linear conditions, the dynamic performance of the active suspension with preview range switching is consistent with the active suspension system with fixed preview range; and under the steering condition, compared with the sliding mode control with fixed preview range, the RMS of spring mass acceleration and tire dynamic load of the suspension system with switching preview range are reduced by 8.42% and 8.76%, respectively. The effectiveness of the control method to improve the dynamic performance of the suspension is verified.

Key words

active suspension / pavement excitation / lidar / steering condition / sliding mode control

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KOU Farong, CHEN Yixiao, ZHANG Xinqian, WANG Qianlei, LIU Pengtao. ctive suspension sliding mode control based on road excitation preview range switching[J]. Journal of Vibration and Shock, 2024, 43(13): 237-247

References

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