使用 AOA-BiLSTM-TPA 基于行为预期的桥梁变形异常检测:考虑温度和交通诱发的时间模式

IF 4.6 2区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Guang Qu, Ye Xia, Limin Sun, Gongfeng Xin
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引用次数: 0

摘要

在结构健康监测(SHM)领域,了解结构的预期行为对于及时识别异常活动至关重要。现有方法往往只对监测数据的物理量建模,而忽略了相应的时间信息。为解决这一问题,本文提出了一种创新的深度学习框架,该框架将 BiLSTM 模型与时间编码的温度和交通诱导的偏转-时间模式协同结合,并通过时间模式关注(TPA)机制加以强化。采用算术优化算法 (AOA) 对超参数进行优化调整,并实施增量学习以实现模型的实时更新。基于所提出的框架,随后开发了一种异常检测方法。这种方法是双向的:它使用量化损失来提供结构行为的预期范围,从而识别孤立的异常现象,而基于多元核密度估计(MKDE)的加窗归一化互信息(WNMI)则有助于检测结构刚度下降引起的趋势变化。该框架和异常检测方法利用一座运行中的斜拉桥的数据进行了验证。结果表明,该方法可有效预测结构行为并检测异常,突出了时间信息在 SHM 中的关键作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Behavior Expectation-Based Anomaly Detection in Bridge Deflection Using AOA-BiLSTM-TPA: Considering Temperature and Traffic-Induced Temporal Patterns

Behavior Expectation-Based Anomaly Detection in Bridge Deflection Using AOA-BiLSTM-TPA: Considering Temperature and Traffic-Induced Temporal Patterns

In the realm of structural health monitoring (SHM), understanding the expected behavior of a structure is vital for the timely identification of anomalous activities. Existing methods often model only the physical quantities of monitoring data, neglecting the corresponding temporal information. To address this, this paper presents an innovative deep learning framework that synergistically combines a BiLSTM model, fortified by a temporal pattern attention (TPA) mechanism, with time-encoded temperature and traffic-induced deflection-temporal patterns. The arithmetic optimization algorithm (AOA) is employed for optimal hyperparameter tuning, and incremental learning was implemented to enable real-time updates of the model. Based on the proposed framework, an anomaly detection method was subsequently developed. This method is bidirectional: it uses quantile loss to provide expected ranges for structural behavior, identifying isolated anomalies, while the windowed normalized mutual information (WNMI) based on multivariate kernel density estimation (MKDE) helps detect trend variability caused by decreases in structural stiffness. This framework and the anomaly detection method were validated using data from an operational cable-stayed bridge. The results demonstrate that the method effectively predicts structural behavior and detects anomalies, highlighting the critical role of temporal information in SHM.

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来源期刊
Structural Control & Health Monitoring
Structural Control & Health Monitoring 工程技术-工程:土木
CiteScore
9.50
自引率
13.00%
发文量
234
审稿时长
8 months
期刊介绍: The Journal Structural Control and Health Monitoring encompasses all theoretical and technological aspects of structural control, structural health monitoring theory and smart materials and structures. The journal focuses on aerospace, civil, infrastructure and mechanical engineering applications. Original contributions based on analytical, computational and experimental methods are solicited in three main areas: monitoring, control, and smart materials and structures, covering subjects such as system identification, health monitoring, health diagnostics, multi-functional materials, signal processing, sensor technology, passive, active and semi active control schemes and implementations, shape memory alloys, piezoelectrics and mechatronics. Also of interest are actuator design, dynamic systems, dynamic stability, artificial intelligence tools, data acquisition, wireless communications, measurements, MEMS/NEMS sensors for local damage detection, optical fibre sensors for health monitoring, remote control of monitoring systems, sensor-logger combinations for mobile applications, corrosion sensors, scour indicators and experimental techniques.
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