论文标题
空气悬浮液以零长度纤维的扭转平衡的特性
An Air Suspension to Demonstrate the Properties of Torsion Balances with Fibres of Zero Length
论文作者
论文摘要
我们报告了已构建的空气悬架的设计和表征，该空气悬浮液的特性强调了纤维长度为零的扭转平衡的特性。该悬浮液在实验室的水平平面上悬浮浮动，其旋转和翻译运动使用磁执行器控制。我们证明了浮子中心的原位电磁调谐，其准确性为$ \ pm $ 0.3毫米，这受到空气轴承噪声的限制。还测量了浮子的旋转刚度，设计约为零。我们将观测到的浮子的行为与浮点部传动系统静态模型的详细模型的预测进行了比较。最后，我们简要讨论了这些思想和结果在构建敏感设备中的应用，以测量短范围的弱力。
We report on the design and characterisation of an air-bearing suspension that has been constructed to highlight the properties of torsion balances with fibres of zero length. A float is levitated on this suspension and its rotational and translational motion in the horizontal plane of the laboratory is controlled using magnetic actuators. We demonstrate the in-situ electromagnetic tuning of the float's centre-of-buoyancy to an accuracy of $\pm$0.3 mm, which was limited by the noise in the air bearing. The rotational stiffness of the float, which is approximately zero by design, was also measured. We compare the observed behaviour of the float with the predictions of a detailed model of the statics of the float-actuator system. Finally, we briefly discuss the application of these ideas and results to the construction of sensitive devices for the measurement of weak forces with short ranges.
