整车半主动悬架模糊控制研究

Study on semi-active suspension based on fuzzy control

为了提高半主动悬架的控制效果,设计了节流口可调式阻尼减振器,根据汽车系统动力学原理建立了半主动悬架整车模型,采用Mamdani模糊控制策略,设计了基于可调阻尼减振器的汽车半主动悬架双模糊控制器,并以某微型轿车为例在Matlab/Simulink环境下进行了阶跃激励仿真试验和随机路面激励仿真试验。仿真结果表明,采用所提出的模糊控制策略改善了汽车的行驶平顺性和乘坐舒适性,同时还降低了悬架被击穿的可能,提高了轮胎的接地性。

In order to improve the control effect of automotive semi-active suspension,a throttle adjustable damping shock absorber was designed,and a full car model of semi-active suspension system was established based on the principle of vehicle dynamics.Mamdani fuzzy control strategy was adopted,and the semi-active suspension fuzzy controller based on adjustable damping shock absorber was designed,and a micro-vehicle was chosen as the object for step incentive simulation and random road excitation simulation.The simulation results under Matlab/Simulink environment show that the fuzzy controller not only improved vehicle ride smooth and travel comfort,but also decreased the probability of suspension break-down,and meanwhile improved performance of the tire ground.