在不受控制的结构健康监测中,基于PCA重建检测异常的最佳主要组件和测量间隔选择
Kang Yang1, Kang Gao1, Junkai Zhou1
1Department of Electrical and Computer Engineering, University of Florida, Gainesville, 32608, FL, USA.
Ultrasonics
|March 25, 2025
概括
本研究介绍了用于结构健康监测PCA重建中选择最佳主要组件和测量间隔的策略. 研究结果显示,重建系数的变化有效地指导了这些选择,减少了损坏检测中的错误报警.
科学领域:
- 结构健康监测 结构健康监测
- 信号处理 信号处理
- 数据分析 数据分析
背景情况:
- 主要组件分析 (PCA) 重建对于无监督损坏检测在引导波结构健康监测中至关重要.
- 测量间隔的选择显著影响数据相关性,PCA值和损坏检测准确度.
- 关于优化PCA组件和测量间隔以尽量减少虚假报警的研究有限.
研究的目的:
- 制定选择最佳主要组件和测量间隔的策略,用于基于PCA重建的损坏检测.
- 在没有事先的损坏信息的情况下,确定最佳参数选择的指标.
主要方法:
- 研究了不同数量的主要组件和测量间隔对PCA重建的影响.
- 分析了重建系数中的模式,作为最佳参数选择的指标.
- 使用来自不同测量间隔的不受控制和动态监测条件的数据验证的结果.
主要成果:
- 重建系数变化的模式有效地表明了最佳的主要组件和测量间隔.
- 拟议的指标允许优化损坏检测参数,而不需要损坏数据.
- 验证证实了这些指标在不同监测场景中的有效性.
结论:
- 最佳的主要组件选择和测量间隔的确定对于基于PCA的准确损坏检测至关重要.
- 重建系数分析为优化这些参数提供了一个强大的方法.
- 这种方法通过减少虚假警报,提高了结构性健康监测系统的可靠性.
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