Model identification methodology for fluid-based inerters
Model identification methodology for fluid-based inerters
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DOI：
10.1016/j.ymssp.2018.01.018
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发表时间：
2018-06
影响因子：
8.4
通讯作者：
Xiaofu Liu;J. Z. Jiang;B. Titurus;A. Harrison
中科院分区：
文献类型：
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作者：
Xiaofu Liu;J. Z. Jiang;B. Titurus;A. Harrison
通过力-电流类比，惯性器是电容器的机械对偶。它具有这样的性质，即通过端子的力与它们的相对加速度成比例。与基于飞轮的惯性器相比，基于流体的形式具有改进的耐久性、固有阻尼和设计简单的优点。为了提高这种基于流体的设备的物理行为的理解，特别是在外部管的液压阻力和惯性效应所造成的，这项工作提出了一个全面的模型识别方法。首先，建立了一个建模过程，它允许的拓扑结构的机械网络，以获得通过映射的阻尼，惯性和刚度的影响直接到各自的液压对应。其次，实验顺序如下，分离的摩擦，刚度和各种阻尼效应的识别。此外，还介绍了一种实验装置，其中使用两个压力计来精确测量跨外管的压降。使用所提出的方法，得到了提高置信度的理论模型的螺旋管流体惯性器原型。对其余差异的来源作了进一步分析。
Inerter is the mechanical dual of the capacitor via the force-current analogy. It has the property that the force across the terminals is proportional to their relative acceleration. Compared with flywheel-based inerters, fluid-based forms have advantages of improved durability, inherent damping and simplicity of design. In order to improve the understanding of the physical behaviour of this fluid-based device, especially caused by the hydraulic resistance and inertial effects in the external tube, this work proposes a comprehensive model identification methodology. Firstly, a modelling procedure is established, which allows the topological arrangement of the mechanical networks to be obtained by mapping the damping, inertance and stiffness effects directly to their respective hydraulic counterparts. Secondly, an experimental sequence is followed, which separates the identification of friction, stiffness and various damping effects. Furthermore, an experimental set-up is introduced, where two pressure gauges are used to accurately measure the pressure drop across the external tube. The theoretical models with improved confidence are obtained using the proposed methodology for a helical-tube fluid inerter prototype. The sources of remaining discrepancies are further analysed.