Laboratory experiment of the structural sensing method using the accurate artificial vibrator
Laboratory experiment of the structural sensing method using the accurate artificial vibrator
复制标题
精密人工振动器结构传感方法的室内实验
DOI：
10.1016/j.aei.2015.03.008
复制
发表时间：
2015
影响因子：
8.8
通讯作者：
Mika Tsukahara and Takahiro OHTANI
中科院分区：
文献类型：
--
作者：
Masayuki SAEKI;Tatsuya KURIHARA;Mika Tsukahara and Takahiro OHTANI
本文介绍了一种利用精密人工振子进行结构传感的方法，并给出了实验室规模的振动实验结果。精确的人工振动器通过旋转偏心质量产生谐波力。由于旋转是通过相位控制类型的控制器精确控制的，因此振动器周期性地产生精确的谐波力。利用相位信息可以精确地计算力函数。将自回归外生（ARX）模型应用于力函数和实测位移响应的时间序列，得到目标结构的绿色函数。在本研究中，我们研究了原型系统的性能，并发展了绿色函数估计方法。我们还进行了实验室规模的振动测试，其中原型系统被应用到一个两米的简单梁。通过有限元分析对估算的绿色函数进行了模拟，并成功地确定了其结构模型。
This paper presents a structural sensing method using the accurate artificial vibrator and shows the results of vibration experiments in laboratory scale. The accurate artificial vibrator generates harmonic forces by rotating an eccentric mass. Since the rotation is accurately controlled by means of a phase control type servomotor, the vibrator generates accurate harmonic forces periodically. The phase information obtained from the servomotor let us calculate the force function precisely. Applying Auto-Regressive eXogenous (ARX) model to the time series of force function and measured displacement responses yields the Green function of a target structure. In this research, we investigated the performance of prototype system and developed the Green function estimation method. We also conducted laboratory scale vibration tests in which the prototype system was applied to a two-meter simple beam. The estimated Green function was simulated by the analysis of Finite Element Method (FEM) and its structural model was successfully determined.