Wireless Sensors for Dynamic Testing of a Full Scale Highway Truss: Vertical Electrodynamic White Noise Shaker Excitation

The truss was excited in the vertical direction with band-limited white noise to simulate ambient excitation in the field. The generated white noise, amplified using an amplifier is imposed on the truss using the electro-dynamic shaker (VG-100 from Vibration Test Systems). In all of the tests the shaker location was constant. For each of the test configurations, data was collected for multiple repetetions of the same shaker excitations. The truss was subject to band limited white noise of 0-200 Hz.

In the tests, wireless sensors are used to measure acceleration responses on the truss structure. Wireless sensors are triaxial, so x, y, and z directions are measured at the same time. Data was collected for 280 seconds at sampling frequencies of 280 Hz for the various sensor configurations.

桁架（Truss）在垂直方向受带限白噪声（band-limited white noise）激励，以模拟现场的环境激励。所生成的白噪声经放大器放大后，通过电动振动台（electro-dynamic shaker，来自Vibration Test Systems的VG-100型）施加于桁架之上。所有测试中，该振动台的安装位置均保持固定。针对每种测试配置，均采集了同一振动台激励下的多次重复实验数据。本次实验中，桁架所受的带限白噪声频段为0-200 Hz。
本实验采用无线传感器（wireless sensors）采集桁架结构的加速度响应（acceleration response）数据。该无线传感器为三轴型，可同时采集x、y、z三个方向的加速度信号。针对不同的传感器配置，实验均以280 Hz的采样频率（sampling frequency）采集了时长280秒的实验数据。

搜集汇总

背景与挑战

背景概述

该数据集记录了在普渡大学实验室对一个17.4米长的全尺寸高速公路标志支撑桁架结构进行的动态测试。实验采用垂直电动白噪声激振器和模态锤击进行激励，并使用无线和有线加速度传感器在144个自由度上采集加速度响应数据，旨在研究结构在完好和损伤状态下的动态特性。