论文标题

使用卷积神经网络丧失振动测试数据恢复:案例研究

Lost Vibration Test Data Recovery Using Convolutional Neural Network: A Case Study

论文作者

Moeinifard, Pouya, Rajabi, Mohammad Sadra, Bitaraf, Maryam

论文摘要

结构健康监测(SHM)网络中的数据丢失最近已成为工程师的主要挑战之一。因此,SHM的数据恢复方法通常是一个昂贵的过程,至关重要。最近,一些技术提供了使用神经网络(NN)算法恢复这些有价值的原始数据的技术。其中,可以将基于卷积的卷积神经网络(CNN)应用于数学操作,可应用于非图像数据集,例如信号,以在没有人类监督的情况下提取重要特征。但是,尚未研究和优化不同参数的效果。因此,本文旨在提出不同的体系结构,并研究不同超参数对最新提议的方法之一的影响,该方法基于Alamosa Canyon桥的CNN算法作为真实结构。为此,考虑分别通过找到其他传感器之间的相关性来预测三个不同的CNN模型来预测一个和两个故障传感器。然后,通过实验数据对CNN算法进行了训练,结果表明该方法在预测Alamosa Canyon桥的遗漏数据方面具有可靠的性能。通过添加卷积层提高了模型的准确性。同样,具有两个隐藏层的标准神经网络接受了CNN模型的相同输入和输出的训练。根据结果​​,CNN模型的精度较高,计算成本较低,并且比标准神经网络更快。

Data loss in Structural Health Monitoring (SHM) networks has recently become one of the main challenges for engineers. Therefore, a data recovery method for SHM, generally an expensive procedure, is essential. Lately, some techniques offered to recover this valuable raw data using Neural Network (NN) algorithms. Among them, the convolutional neural network (CNN) based on convolution, a mathematical operation, can be applied to non-image datasets such as signals to extract important features without human supervision. However, the effect of different parameters has not been studied and optimized for SHM applications. Therefore, this paper aims to propose different architectures and investigate the effects of different hyperparameters for one of the newest proposed methods, which is based on a CNN algorithm for the Alamosa Canyon Bridge as a real structure. For this purpose, three different CNN models were considered to predict one and two malfunctioned sensors by finding the correlation between other sensors, respectively. Then the CNN algorithm was trained by experimental data, and the results showed that the method had a reliable performance in predicting Alamosa Canyon Bridge's missed data. The accuracy of the model was increased by adding a convolutional layer. Also, a standard neural network with two hidden layers was trained with the same inputs and outputs of the CNN models. Based on the results, the CNN model had higher accuracy, lower computational cost, and was faster than the standard neural network.

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