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介绍了磁流变技术在触觉反馈系统中的应用。分析了基于磁流变液的触觉反馈系统的基本工作原理,讨论了被动触觉力反馈装置和被动触觉反馈、主动控制系统的工作方式,为增强人机系统控制能力提出了一个可行的方向。 相似文献
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设计了一种汽车轮内叶轮式磁流变液制动器,根据磁流变液在强磁场下的流变特性,推导出该制动器的制动力矩计算方法,并在Matlab/Simulink环境下建立仿真模型,分析了制动器结构参数对制动力矩的影响。所设计的汽车磁流变液制动器能够满足一般小型汽车的制动力矩需求。 相似文献
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提出了一种利用磁流变液这一新兴智能材料来实现微机器人的蠕动驱动方式。文章分析了其运动规律及控制电压的时序,并通过ADAMS仿真验证了其可行性,为后续的研究提供了依据。 相似文献
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现今人类生态环境的日益恶化迫使世界各国不得不关注摩擦材料对环境的负面影响,磁流变液智能材料的出现,为解决制动摩擦材料环境问题与开发新型制动器提供了新思路。文中综述了磁流变液及磁流变液制动器的研究现状,并指出磁流变制动器作为一种新型、环保、节能的制动器将有很大的市场潜力,其较之传统液压式制动器优势明显,但要在乘用车上大规模使用,还需要进行更全面更深入的研究,以进一步提高磁流变液制动器的制动力矩,使其满足乘用车制动力矩要求。认为可将液压式制动器与磁流变液制动器结合起来,研发出具有我国自主知识产权的一种新型的制动器,推动承用车制动器的更新换代。 相似文献
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磁流变液是一种新兴的智能材料,以其优良的物理特性、力学特性和可控性,广泛应用于工程领域。文中采用试验的方法对不同的磁场强度、不同的剪切速率以及不同的铁粉质量分数的百分比下的流变性进行研究,得到了磁流变液材料的性能随磁场强度、剪切速率、铁粉质量分数的百分比等变化的规律,为磁流变材料的开发研究和工程应用提供了基本依据。 相似文献
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为了提高静压轴承的承载能力和回转精度,提出一种基于磁流变液(Magnetorheological Fluid,MRF)润滑的静压轴承。对磁流变液静压轴承进行结构设计,并对其承载力和油膜刚度进行了计算;通过Maxwell仿真分析不同轴承材料、不同电流对静压轴承性能的影响规律;采用CFX流体仿真分析不同间隙对静压轴承承载力的影响。通过仿真分析,选择磁感应强度最大的铸铁作为轴承材料,以适应更大的负载变化,选择半径间隙为20 μm以增大承载能力。通过ANSYS流固耦合仿真,验证设计的磁流变液静压轴承的优越性,相比普通静压轴承其承载力提高了11.6%,回转精度提高了17.4%。 相似文献
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MEMS magnetometer based on magnetorheological elastomer 总被引:1,自引:0,他引:1
Guangtao DuXiangdong Chen 《Measurement》2012,45(1):54-58
To develop a simple and low-cost MEMS magnetometer, a novel sensor based on the magnetostrictive effect of magnetorheological elastomer is proposed. The micromechanical sensor consists of a silicon sensitivity diaphragm embedded with a piezoresistive Wheatstone bridge, and a magnetorheological elastomer layer attached on the sensitivity diaphragm. The interaction between the magnetic field and the elastomer generates a deflection of the sensitivity diaphragm, which changes the piezoresistance and unbalances a Wheatstone bridge. The experimental results show that the sensor has good linearity in the magnetic field range of 0-120 kA/m and the saturation magnetic field is ∼150 kA/m. This simple, low-cost, low-power sensor is easily integrated with electronic circuits using the MEMS processes. 相似文献
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Advanced nanofinishing is an important process in manufacturing technologies due to its direct influence on optical quality, bearing performance, corrosion resistivity, bio-medical compatibility and micro-fluidics attributes. Chemo-mechanical magnetorheological finishing (CMMRF) process, one of the advanced nanofinishing process, was developed by combining essential aspects of chemo-mechanical polishing (CMP) process and magnetorheological finishing (MRF) process for surface finishing of engineering materials. The CMMRF process was experimentally analyzed on silicon and copper alloy to generate surface roughness of the order of few angstroms and few nanometers respectively. However, the process needs theoretical exploration towards better understanding, process optimization and result prediction. Hence, an attempt has been made for theoretical study of CMMRF process to analyze the effects of MR fluid under various process parameters. The present theoretical work is split as per following two sub-activities to simplify intricacy of the work.1) FEA-CFD simulation to analyze magnetism, polishing pad formation and polishing pressure during the CMMRF process. The simulation results are used to conduct experiments on aluminium alloy.2) A mathematical model has been developed to predict material removal as well as surface roughness during the CMMRF process. Model validation is conducted by comparing finite element simulation results with the experiments on aluminium alloy.The theoretical results show good agreement with the experimental data and the same has been discussed in this paper. 相似文献
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提出把磁流变液作为电动机软启动装置的工作介质,介绍了磁流变液的特性,利用磁流变液屈服应力的Bingham塑性模型,分析了用磁流变液实现电动机软启动的原理,推导了磁流变液软启动器传递力矩的计算公式。 相似文献
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Sunil Jha V. K. Jain 《The International Journal of Advanced Manufacturing Technology》2009,42(7-8):656-668
The finishing action in magnetorheological abrasive flow finishing (MRAFF) process relies mainly on bonding strength around abrasive particles in magnetorheological polishing (MRP) fluid due to cross-linked columnar structure of carbonyl iron particles. The fluid flow behaviour of MRP fluid exhibits a transition from weak Bingham liquid-like structure to a strong gel-like structure on the application of magnetic field. Depending on the size and volume concentration of abrasives and carbonyl iron particles (CIPs) in the base medium, the rheological properties hence, bonding strength gained by abrasives through surrounding CIP chains varies. To study the effect of particle size on rheological properties of MRP fluid, a hydraulically driven specially designed capillary magnetorheometer was fabricated. The rheological properties of MRP fluids in the homogeneous magnetic field perpendicular to the shear flow direction are evaluated. The three constitutive models, viz. Bingham plastic, Herschel–Bulkley and Casson’s fluid, are used to characterise the rheological behaviour of MRP fluid by fitting the rheological data obtained from capillary magnetorheometer and evaluating respective constants in their constitutive equations. 相似文献
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基于挤压模式下磁流变液力学行为的实验研究 总被引:2,自引:2,他引:2
对磁流变液在不同直流电流作用下的准静态挤压过程进行了实验研究.建立了用于测试磁流变液挤压模式下力学特性的实验装置,并通过ANSYS/Multiphysics对此实验装置磁路的磁感应强度分布进行了仿真分析.测试了压应力和压缩弹性模量各自随压应变的变化曲线.实验结果表明:压应力与压应变、外加电流大小和磁流变液本身的性能都有密切的关系.压应力与压应变、压缩弹性模量与压应变的曲线可以划分为3个不同的区域.在第1区域压应变小于0.025时,压应力和压缩弹性模量随压应变的增加而迅速增加;在第2区域压应力与压应变的曲线斜率近乎为零,而压缩弹性模量却随压应变的增大而下降,在压应变约为0.15时降到最低.随后在压应变大于0.15时压应力和压缩弹性模量与压应变显示为指数关系. 相似文献
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轴向绕组磁路结构磁流变液阻尼器设计 总被引:3,自引:0,他引:3
给出轴向绕组磁路结构磁流变阻尼器的设计方法,通过判定线圈横截面积与线圈槽横截面积相等,将阻尼器结构设计与磁路设计联系起来,设计出结构合理紧凑的阻尼器。然后采用ANSYS软件对磁路结构进行电磁场有限元分析,分析表明阻尼器结构设计满足要求,轴向绕组磁路结构改善了阻尼间隙通道磁场分布。 相似文献