Design and metrological evaluation of the new 5 MN hexapod-shaped multicomponent build-up system
Design and metrological evaluation of the new 5 MN hexapod-shaped multicomponent build-up system
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DOI：
10.1088/0026-1394/53/3/956
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发表时间：
2016-06-01
期刊：
影响因子：
2.4
通讯作者：
Barbato, Giulio
中科院分区：
文献类型：
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作者：
Palumbo, Stefano;Germak, Alessandro;Barbato, Giulio
新的5 MN六足形多组件组装系统（HSM-BUS）代表了高力范围内参考传感器领域的重大进展。与任何组合系统一样，所提出的六足形多分量力传感器不仅可以测量比每个单轴力传感器（UFT）的能力高5倍的力，而且还可以给出关于力矢量和力矩矢量的其他分量的信息。此外，这种类型的多分量力传感器的校准仅涉及来自每个UFT的信号输出的校准和系统几何形状的校准。在这项工作中，一个先验评估的预期不确定性进行。作为第一近似，UFT的校准不确定度和施工图上给出的几何公差的影响被考虑。随后，通过对5 MN HSM-BUS在负载下的机械行为进行有限元模拟，对弹性变形的数学模型进行了评估，并将其应用于评估和校正由于负载下几何形状变形而引起的系统误差。
The new 5 MN hexapod-shaped multicomponent build-up system (HSM-BUS) represents significant progress in the field of reference transducers in the high force range. As with any build-up system, the presented hexapod-shaped multicomponent force transducer can lead, not only to measure forces 5 times higher than the capacity of a each single uniaxial force transducer (UFT), but gives also information about the other components of the force vector and of the moment vector. Furthermore, the calibration of such types of multicomponent force transducer regards only the calibration of the signal outputs coming from each UFT and the calibration of the geometry of the system. In this work, an a priori evaluation of the expected uncertainty is performed. As a first approximation, the effects of the calibration uncertainties of UFTs and of the geometrical tolerances given on the construction drawing were considered. Subsequently, with a finite element simulation of the mechanical behavior of the 5 MN HSM-BUS under load, a mathematical model of elastic deformations has been evaluated and applied for evaluating and correcting the systematic errors due to the deformation of the geometry under load.