关键词: 车辆工程, 双横臂悬架, 动力学建模, 天棚参考模型, 模糊滑模控制

Abstract: In view of the low accuracy of the model caused by the direct use of suspension parameters in the traditional double-wishbone suspension modeling, which could not fully reflect the dynamic characteristics of the suspension, the mechanism dynamic modeling of the double-wishbone suspension was carried out, and the equivalent coefficients of the damping coefficient and spring stiffness of the suspension were calculated. In order to further optimize the control effect, the sliding mode controller with fuzzy gain control switch was designed, which took the ideal canopy damping system as a reference model, the error dynamic equation between actual controlled system and reference model as the control object of fuzzy sliding mode controller. In order to reduce the chattering in the sliding mode control, the switch gain K (t) was fuzzified and verified by Matlab/ Simulink simulation and compared with PID and passive suspension. The research results show that the fuzzy sliding mode controller can effectively reduce the acceleration of the vehicle body and improve the ride comfort of the vehicle.

Key words: vehicle engineering, double wishbone suspension, dynamic modeling, skyhook-based reference model, fuzzy sliding mode control