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摘要：磁流变液(MRF)是一种具有良好发展前景和工程应用价值的新型智能材料，在外加磁场作用下，会产生明显的磁流变效应。使用磁流变液的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。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。振动控制在现代工程中应用十分广泛，很多工程因为没有考虑共振效应而失败，造成经济上的损失和人员伤亡。因此，其研究价值不言而喻。磁流变液阻尼器减振控制就是一种半主动控制技术。基于磁流变液特性的突出优点，并通过大量的实践中的应用，发现基于磁流变阻尼器的半主动控制展现出了很好的减振效果。本文通过对理论分析和数值仿真的方法，首先要建立了悬臂梁的振动力学模型，然后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PID控制算法的设计与实现，进行了研究。然后通过MATLAB进行了仿真，最后得到了仿真结果。结果表明：可以通过PID控制有效地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。35157
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毕业论文关键词： 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. The vibration control is widely used in modern engineering, because of the failure of the resonance effect, the economic loss and the casualties caused by the casualties are not considered. Therefore, its research value is self-evident. The damping control of MR damper is a semi-active control technology. Based on the outstanding merits of the magnetic rheological fluid, and through the application of a lot of practice, it is found that the semi-active control based on MR damper has a good effect on vibration reduction. 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. Then，this graduation design is simulated by MATLAB, and the simulation results are obtained. The results show that the vibration damping of the cantilever beam can be controlled effectively through the PID control and the input current of the damper is controlled effectively
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国内外对磁流变液阻尼器的研究及应用 1
1.3 基于磁流变液阻尼器的半主动闭环控制系统的研究现状 2
1.4振动控制减振技术的研究 2
1.4.1振动控制减振技术的研究背景 2
1.4.2 被动控制 ….2
1.4.3 主动控制 ….2
1.4.4 半主动控制…3
1.4.5 混合控制 …3
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