基于LabVIEW的磁流变半主动悬架预瞄控制的研究

Research on Preview Control of MRF Semi-active Suspension Based on LabVIEW

为了对磁流变半主动悬架进行控制,以改善车辆行驶的平顺性,研究了磁流变阻尼器的工作原理,根据磁流变阻尼器的工作特性,在LabVIEW中设计了磁流变半主动悬架的预瞄前馈模糊控制器,将预先得到的轴间预瞄位移信号及其变化率作为模糊控制器的输入,计算出理想的磁流变阻尼器电流控制信号,并搭建了实验装置,采用LV-LINK工具包实现第三方采集硬件与LabVIEW的通讯,从而实现硬件在环实验仿真。通过实验结果的对比来验证所设计控制方法的有效性。

To control the MRF semi-active suspension to improve the vehicle smoothness ability,the working principle of MRF damper is studied.Based on the working characteristic of MRF damper,the preview feedforward fuzzy logic controller is designed in LabVlEW, which takes the preview displacement signal and its changing rate as the inputs of the controller,and works out the desired current control signal of the MRF damper.The experiment system for the MRF semi-active suspension is built.The LV-LINK toolkit is used to communicate between LabVIEW and the third-party data acquisition hardware to realize the hardware-in-loop simulation.Experiment results are analyzed and compared to prove the control method.