基于模糊自适应PID控制器的空气悬架控制策略研究

Control Strategy Research of Air Suspension Using Fuzzy Adaptive PID Control Method

空气悬架可以根据车辆振动情况改变悬架控制力,从而提高车辆的乘坐舒适性和道路友好性.为了提高车辆的行驶平顺性,利用Matlab/Simulink建立了1/4空气悬架模型和控制器,控制器通过模糊控制对PID控制器参数进行自整定,对PID的控制量加以实时修正.仿真结果表明,采用模糊自适应PID控制器空气悬架的车辆相对于PID控制悬架和被动悬架车身加速度有明显减小,轮胎动载荷有所减小,但悬架动行程略有提高.综合来看,模糊自适应PID控制器具有较好的控制效果,改善了汽车行驶平顺性.

In order to improve the vehicle ride comfort capability ,using Matlab /Simulink a 1/4 air suspension model and controller are established to establish .The controller through fuzzy control for PID controller parameters self‐tuning ,the amount of PID controller parameter will correct in real time .The simulation results show ：the fuzzy adaptive PID controller for the air suspension relative to PID control suspension and passive suspension has significantly reduce of the vehicle body accelera‐tion ,the dynamic load of tire is reduced ,but the suspension dynamic deflection increased slightly .On the w hole ,fuzzy adaptive PID controller has a better control effect ,to improve the automobile ride comfort capability .