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A new resonant based measurement method for squeeze mode yield stress of magnetorheological fluids

机译：一种基于共振的磁流变流体挤压模屈服应力测量方法

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摘要

A new approach to measure the field-dependent yield stress of magnetorheological (MR) fluids in squeeze mode using the resonance concept is proposed. The measurement system is designed using the piezolaminated cantilever beam coupled with an electromagnetic coil based MR fluid squeezing setup. The cantilever beam is maintained at resonance using simple closed-loop electronics. The magnetic field produced by the coil changes the viscosity of MR fluids and produces an additional stiffness to the resonating cantilever beam. The shift in resonant frequency due to the change in viscosity of the MR fluid is measured, and the shift in frequency is analytically related to the yield stress. Two types of MR fluids based on sphere and plate iron particles are used to demonstrate the effectiveness of the proposed measurement system.
机译：提出了一种利用共振概念来测量磁流变（MR）流体在挤压模式下与磁场有关的屈服应力的新方法。该测量系统是使用压电化悬臂梁与基于电磁线圈的MR流体挤压装置相结合而设计的。悬臂梁通过简单的闭环电子设备保持共振。线圈产生的磁场改变了MR流体的粘度，并为共振悬臂梁增加了刚度。测量由于MR流体的粘度变化而引起的共振频率偏移，并且该频率偏移与屈服应力解析相关。基于球形和板铁颗粒的两种类型的MR流体被用来证明所提出的测量系统的有效性。

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