基于PID控制器的麦弗逊悬架联合仿真研究

Co-simulation Research of Macpherson Suspension Based on PID Controller

通过实验测出磁流变阻尼器在不同电流作用下的力与速度关系的阻尼系数特征数据,将阻尼数据导入到麦弗逊悬架多体动力学模型中模拟真实悬架的工作状态,计算簧载质量速度及其变化率作为主动悬架控制的输出量;半主动悬架采用PID控制器;在MATLAB搭建悬架系统联合仿真模型,计算结果表明:采用PID控制器在各不同车速阶段对改善悬架的总体性能有明显作用,车身垂直加速度、悬架动行程、俯轮胎动行程在低频阶段改善突出,提升整车在不同车速范围内乘坐舒适特性。

MRF damper damping characteristic data at different current role of force and velocity is measured through experiment. The real state of suspension of work is simulated by importing data into McPherson suspension damping multi-body dynamics model. Sprung mass velocity and its rate of change as the active suspension control output is calculated. PID controller is adopted in semi-active suspension, suspension system co-simulation model is built in MATLAB. The results show that： the use of PID controller in various stages of vehicle speed plays a significant role in order to improve the overall performance of the sus- pension, Vertical body acceleration, suspension dynamic travel, overlooking the tire dynamic stroke are improved prominently in the low fxequencies, which can enhance the characteristic of vehicle-riding comfort in different speed ranges.