基于变论域模糊控制的车辆半主动悬架控制方法

针对车辆半主动悬架系统，提出了一种基于变论域模糊PID控制方法，目标是提高车辆在随机路面激励作用下的平顺性。通过将变论域方法与模糊PID控制器相结合来解决模糊PID存在的因模糊规则制定盲目性而产生的在线调节时间过长等问题。由仿真和实验研究对比可知，变论域模糊PID控制下的半主动悬架系统中的车身垂直振动速度和加速度比常规PID控制下的车身垂直振动速度和加速度分别减小了46.56%和29.21%，相比被动悬架系统的车身垂直振动速度和加速度分别减小了58.05%和49.74%。使用该车辆半主动悬架模糊控制方法可提高车辆的平顺性。

Control Method of Vehicle Semi Active Suspensions Based on Variable Universe Fuzzy Control

A fuzzy control method was proposed based on variable universe fuzzy PID for vehicle semi-active suspension systems herein. The goals were to improve the ride comfort of vehicles under random road excitations. The fuzzy PID controller was combined with variable universe method to solve the problems that the fuzzy rules were blind and the online regulation time was too long. The simulations and experimental results show that, variable universe fuzzy PID control semi-active suspension systems in the body vertical vibration velocity and acceleration are reduced  by 46.56% and 29.21% respectively in comparison with conventional PID controls, compared to the passive suspension systems they are reduced by 58.05% and 49.74% respectively. The vehicle semi-active suspension fuzzy control method has better effects on vehicle ride comfort.