基于Freescale单片机的电子控制空气悬架模糊PID控制

Fuzzy-PID control of the electronic control air suspension based on Freescale MCU

以 Freescale 公司的 MC9S08GB60A 单片机为控制芯片,以 YBL6891H 型客车的1/4车辆模型为研究对象,设计了一种客车用空气悬架的电子控制单元。该控制单元以车身垂直加速度的均方根为主要控制目标,采用了模糊 PID 控制算法,并用 MATLAB/SIMULINK 对该模型进行了仿真,仿真结果表明,利用该控制系统能很好地抑制客车的振动。

An electronic control unit for air suspension of the passenger car is designed based on the quarter vehicle model of YBL6891H-passenger car. Freescale＇s MCU MC9508GB60A is adopted as the control chip in the design. With RMS of perpendicular vibration acceleration of the vehicle as control index, Fuzzy-PID control algorithm is adopted in the control unit and simulation of the quarter model is carried out in MATLAB/SIMULINK. The results of simulation illustrate the vibration of the vehicle is controlled greatly.