基于模糊PID控制器的1/2整车半主动悬架仿真研究

通过抽象简化建立1/2整车半主动悬架数学模型,并在MATLAB软件中搭建仿真模型;计算出被动悬架的簧载质量、速度及其变化率,并作为主动悬架控制的输出量。半主动悬架采用模糊PID复合控制器,用模糊控制策略对PID控制器在给定的参数范围内进行在线实时调整。研究结果表明:采用模糊PID复合控制器的半主动悬架在不同车速阶段,对改善整车的总体性能有明显作用,车身垂直加速度、车身俯仰角加速度、前后悬架动行程改善明显,提升了整车在不同车速范围内的乘坐舒适性和操纵稳定性。

A Simulation Research on 1/2 Vehicle Semi-Active Suspension Based on the Fuzzy-PID Controller

A mathematical model of 1/2 vehicle semi-active suspension has been built by abstraction and simplification, followed by the establishment of a simulation model in MATLAB software. The final results of the sprung mass, speed and change rate of passive suspension, which are to be taken as the output of active suspension control, has been worked out. The fuzzy PID compound controller has been adopted by the semi-active suspension, for the purpose of the adjustment of the PID controller online in the given parameter range. The results show that the semi-active suspension with the fuzzy PID controller has an evident effect on the improvement of the overall vehicle performance at different speed stages, with the body vertical acceleration, body pitch angle acceleration, as well as the front and rear suspension moving stroke obviously improved, thus helping to improve the ride comfort and handling stability of the vehicle in different speed ranges.