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为了分析和评价具有半主动模糊控制的重型卡车空气悬挂系统性能,基于Matlab/Simulink软件建立了具有16自由度的三维非线性动力学模型.以座椅的平均垂直加速度响应、驾驶室的俯仰和倾斜角及动载系数(DLC)为目标函数,用半主动模糊控制方法对不同工况下的车辆空气悬挂系统进行了优化分析.结果表明:在ISO D级和ISO E级路面上,当车速超过27.5 m/s时,驾驶室侧倾角对重型卡车乘坐舒适性影响非常明显;在ISO B级路面车速为20 m/s时,车辆座椅的平均垂向加速度、驾驶室俯仰角及驾驶室倾侧角分别降低了24%,30%和25%.此外,在不同路况条件下,车辆的动载系数均有较大的降低.特别地,在ISO B级路面车速为27.5 m/s且满载时,车辆驱动轴处的动载系数降低了27.4%.
In order to analyze and evaluate the performance of the air suspension system with semi-active fuzzy control, a three-dimensional nonlinear dynamic model with 16 DOFs was established based on Matlab / Simulink software.The average vertical acceleration response of the seat, cab pitch and Tilt angle and dynamic load coefficient (DLC) as objective function, the semi-active fuzzy control method is used to optimize the air suspension system of vehicles under different working conditions.The results show that on the ISO D-class and ISO E-class pavement, Over 27.5 m / s, the cabin roll angle has a significant impact on the comfort of heavy-duty trucks; at ISO m Class B the average vertical acceleration of the vehicle seat, cab pitch angle, and cab The roll angle is reduced by 24%, 30% and 25% respectively. In addition, under different road conditions, the dynamic load factor of the vehicle is greatly reduced. Especially, when the vehicle speed of ISO Class B is 27.5 m / s and full load , The dynamic load coefficient at the drive axle of the vehicle is reduced by 27.4%.