减轻温度变化对超声波导向波式结构健康监测的影响,通过变化自动编码器
Rafael Junges1, Luca Lomazzi1, Lorenzo Miele1
1Politecnico di Milano, Department of Mechanical Engineering, Via La Masa n.1, 20156 Milan, Italy.
Sensors (Basel, Switzerland)
|March 13, 2024
概括
这项研究引入了一种新的生成人工智能方法,用于减少使用引导波对结构健康监测 (SHM) 的环境影响. 该方法有效地减轻了温度变化,提高了结构中损坏检测的准确性.
科学领域:
- 材料科学与工程 材料科学与工程
- 人工智能和机器学习
- 非破坏性测试和评估.
背景情况:
- 结构健康监测 (SHM) 对于结构的成本效益维护至关重要.
- 目前的SHM方法使用超声波引导波和传感器网络来检测损坏.
- 现有的数据驱动方法提高了诊断性能,但与环境和操作条件 (EOC) 斗争.
研究的目的:
- 证明机器学习在减少EOC对SHM影响方面的有效性.
- 专门解决和减轻影响超声波引导波信号的温度变化.
- 提高SHM系统中损伤诊断的可靠性和准确性.
主要方法:
- 利用生成性人工智能,特别是变化自编码器 (VAE) 和奇数值分解 (SVD).
- 训练模型学习温度对引导波传播的影响.
- 利用受过训练的模型的生成能力,在不同温度下重建信号,包括精细的"强制VAE"方法.
主要成果:
- 成功演示了生成人工智能的能力,以减轻对引导波信号的温度影响.
- 拟议的框架显示了在未见温度下信号重建精度的提高.
- 在复合板上对现实世界的测量进行验证证实了框架的有效性.
结论:
- 生成型人工智能,特别是VAE与SVD相结合,为在SHM中处理EOC提供了强大的解决方案.
- 开发的方法显著减少了温度变化的影响,提高了损伤诊断的可靠性.
- 这种概念验证为在具有挑战性的操作环境中更强大,更准确的SHM系统铺平了道路.
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