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摘要：磁流变阻尼器具有阻尼连续可调、动态范围宽、响应速度快、功耗低等特点，现已成为振动控制中非常有应用前景的智能器件[1]。在安装有磁流变阻尼器的减振系统中，通过改变阻尼器的阻尼力大小（即通过改变对磁流变液阻尼器输入电流的大小），可以实现系统的减振控制。由于磁流变阻尼器动力学特性非常复杂，具有典型的非线性特性，目前描述它的力学模型以及能充分发挥其耗能减振的控制算法还不完善。因此对磁流变阻尼器、典型减振系统及其控制算法进行的研究非常有意义[2]。本毕业论文利用理论分析和数值仿真的方法，首先建立了悬臂梁的振动力学模型，对磁流变阻尼器的力学模型、减振系统动力学特性以及减振控制算法的设计与实现进行了研究。由于时间和器材的限定，本次的课程设计未能做成实验，本次毕业设计只是通过MATLAB进行了仿真，并得到了仿真结果。结果表明：通过PID控制可以有效地通过对控制磁流变液阻尼器输入电流来间接控制对悬臂梁的减振。21013
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关键词： 磁流变液阻尼器；悬臂梁；减振；PID控制；MATBAL仿真
Semi Active Closed-loop Control System Based on Magnetorheological Fluid Damper
Abstract: Magnetorheological dampers are continuously adjustable damping, wide dynamic range, fast response, low power consumption, it has become a very promising application of smart devices in vibration control. In the installation of a damping system of magneto rheological damper, by changing the size of the damper force (that means it is by changing the magnetorheological fluid damper input current), the system can achieve the damping control. Due to the dynamical characteristics of MR damper is very complex, with typical nonlinear characteristic, the description of its mechanics model and the control algorithm of energy dissipation is not perfect. Therefore the research of typical vibration control system and its method of magnetorheological damper are very meaningful. In this paper, using the method of theoretical analysis and numerical simulation, the first vibration mechanical model of cantilever beam is established, the mechanical models of magnetorheological damper, damping system dynamic characteristics and design of vibration control algorithm and realization are studied. Because of limited time and equipment, curriculum design failed to the make the experiment, this graduation design is simulated by MATLAB, and the simulation results are obtained. The results show that: the PID control can effectively through control of magnetorheological fluid damper input current to control vibration of the cantilever beam.
Keywords: Magnetorheological fluid damper；Cantilever beam；Damping；PID control；MATBAL Simulation
目 录
1 绪论 1
1.1 课题开展的依据 1
1.2 基于磁流变液阻尼器的减振装置国内外的发展概况 1
1.2.1 国外研究及发展现状 1
1.2.2 国内研究及发展现状 2
1.3 完成本课题已具备的条件和存在的困难 2
2 磁流变液阻尼器工作原理及内容 3
2.1 磁流变液以及磁流变液阻尼器简介 3
2.1.1 磁流变液和磁流变效应……..3
2.1.2 磁流变液阻尼器……..3
2.2 磁流变液阻尼器的力学模型 4
2.2.1 静力学模型….4
2.2.2 动力学模型….4
2.3 磁流变液阻尼器减振控制技术 4
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