基于模糊控制的汽车主动悬架系统仿真研究

汽车悬架直接影响汽车在行驶过程中抑制不平路面对车身的冲击力及车身倾斜度,传统被动悬架遇冲击自动调节能力较差,抗振能力不强,针对上述问题,通过对悬架受力特点分析,建立了1/4车体二自由度主动悬架数学模型,结合自动控制理论,设计车辆的主动悬架模糊控制器,利用MATLAB/Simulink模糊工具箱对其进行仿真,在相同输入的情况下,对主动悬架与被动悬架模型部分性能参数分析比较,仿真结果表明采用此模糊控制器的主动悬架在提高车辆乘坐的舒适性和操纵的稳定性方面明显优于被动悬架。实验证明,研究结果对汽车主动悬架系统的设计具有一定参考价值。

Simulation of Automotive Active Suspension with Fuzzy Control

Automobile suspension affects the ability of inhibiting the impact of uneven road to body and gradient of body to automobile in the running process,and old suspension has poor ability of automatic adjustment and weak capability of antivibration.By analyzing the forcing characteristics of suspension,we built a mathematical model of two-degree of freedom active suspension model of a quarter of vehicle,and designed of fuzzy controller for vehicle active suspension for the above reasons combining the automatic control theory.Using the MATLAB/Simulink fuzzy toolbox,we designed fuzzy controller for the active suspension,and under the same input conditions,analyzed and compared some performance parameters of active suspension model and passive suspension model.The simulation result shows that active suspension with fuzzy controller is significantly better than the passive suspension on ride comfort and handling stability.Experiment shows that the study has certain reference value for the practical application of active suspension system.