模糊PID控制在磁流变缓冲器中的应用

Research on the Application of Fuzzy PID Control in Magneto-Rheological Damper

为了探究模糊控制在磁流变缓冲器的优势,以某型直升机为原型,设计出一款磁流变缓冲器,建立的磁流变缓冲器的落震仿真动力学模型,并结合经典PID控制理论与模糊控制理论,为了实现缓冲器的半主动控制,设计出基于缓冲器行程与活塞相对速度的二维模糊控制器,通过输出不同强度的电流,来控制阻尼力的大小。经过Matlab-Simulink进行落震仿真验证,并与基于活塞相对速度的一维经典PID控制器的控制效果对比,所设计的模糊控制器具有结构简单、品质高、鲁棒性强,能够有效减少缓冲器的峰值载荷,提高缓冲器效率。

In order to explore the advantage of fuzzy control in magneto-rheological damper,Using the parameters of a helicopter, the magneto-rheological damper and the model of the vertical motion of the magneto-rheological damper were designed. According to the model and the theory of fuzzy control and classic PID control,a kind of two-dimensional fuzzy controller,which is based on damper stroke and the relative velocity of piston,was designed to realize the semi-control of the magnetorheological damper. According to the input parameters, this controller outputs different intensity of current to change the damping force. Through simulation of drop test using Matlab-Simulink and the comparison with a classic PID controller based on the relative velocity of piston, this kind of intelligent controller was proved to be high quality and strong robustness,which can reduce the peak load and improve the efficiency of the damper.