汽车磁流变液减振器的研究

【作者】 张莉洁；

【导师】 郑建国；

【作者基本信息】 南京理工大学 ， 机械电子工程， 2004， 硕士

【摘要】 本文主要研究了智能液体材料—磁流变液技术在汽车减振系统中的应用。与传统的汽车被动悬架系统相比，装有磁流变液减振器的半主动悬架系统，可以根据路面状况和车辆运行状态，在计算机的控制下自动调节阻尼力，大大提高了汽车乘坐的舒适性和行驶安全性。 本文采用模糊推理控制策略，以MATLAB／SIMULINK为仿真工具，对磁流变液减振器半主动悬架系统统进行了计算机设计及仿真。在此基础上，提出了车辆减振器基于磁流变液新技术的控制方法并设计开发了以DSP芯片为主控器件的减振器电控系统。仿真结果充分证明了本文提出的控制方案是正确可靠的，并证明磁流变液减振器在提高汽车操纵稳定性和行驶平顺性方面均优于传统的减振系统。 本文研究证明了磁流变液减振器在汽车半主动悬架控制系统中良好的减振控制特性，为汽车减振技术的进一步发展提供了很好的前景。更多还原

【Abstract】 In this paper, the application of the intelligent fluid-magnetorheological fluid (MRF) technology for car absorption of vibration system is studied. Compared with the passive car suspension, the semi-active car suspension system with the intelligent MRF damper can control the damping force automatically with the computer control and then enhance the ride comfort and handling stability of the car more effectively.This paper establishes a one-forth vehicle model with a semi-active suspension, applying fuzzy logic control strategy, using MATLAB/SIMULINK as a simulation tool to simulate this control system. Based on the simulation results, this paper designs and develops a fuzzy-controlled semi-active suspension system in which TMS320LF2407 DSP plays the main role. The simulation results demonstrate that the mathematical model and control methods presented by this paper are accurate and reliable. The performances of semi-active suspension excel that of passive suspension in the aspect of ride comfort and handling stability.The results show good effect of semi-active car suspension with MRF damper and verify feasibility and advantage of MRF damper in car suspension control and in the mean time provide a good future for the development of car absorption of vibration technology.更多还原