论文标题
基于Xgboost的声学信号空穴检测框架,具有自适应选择功能工程
An acoustic signal cavitation detection framework based on XGBoost with adaptive selection feature engineering
论文作者
论文摘要
阀被广泛用于工业和国内管道系统。但是,在操作过程中,它们可能会遭受空化的发生,这可能会引起阀体内部组件的噪音,振动和损坏。因此,监测阀内部的流量状态非常有益,可以防止空化引起的额外成本。在本文中,提出了一种新型的声学信号空穴检测框架,基于XGBoost,具有自适应选择功能工程。首先,开发了具有非重叠滑动窗口(NOSW)的数据增强方法,以解决本研究所涉及的小样本问题。然后,通过快速的傅立叶变换(FFT)将每个分段的时间域声信号转换,其统计特征被提取为自适应选择功能工程(ASFE)过程的输入,在该过程中,自适应特征聚合和特征交叉执行。最后,使用选定的特征,XGBoost算法进行了空化检测的训练,并在Samson AG(Frankfurt)提供的阀门声信号数据上进行了测试。我们的方法已取得了最新的结果。在二元分类(空化和无浪费)上的预测性能以及四类分类(气noged沟,持续的空化,初期的空化和无浪费)令人满意,并且在准确性上提高了传统的XGBoost 4.67%和11.11%。
Valves are widely used in industrial and domestic pipeline systems. However, during their operation, they may suffer from the occurrence of the cavitation, which can cause loud noise, vibration and damage to the internal components of the valve. Therefore, monitoring the flow status inside valves is significantly beneficial to prevent the additional cost induced by cavitation. In this paper, a novel acoustic signal cavitation detection framework--based on XGBoost with adaptive selection feature engineering--is proposed. Firstly, a data augmentation method with non-overlapping sliding window (NOSW) is developed to solve small-sample problem involved in this study. Then, the each segmented piece of time-domain acoustic signal is transformed by fast Fourier transform (FFT) and its statistical features are extracted to be the input to the adaptive selection feature engineering (ASFE) procedure, where the adaptive feature aggregation and feature crosses are performed. Finally, with the selected features the XGBoost algorithm is trained for cavitation detection and tested on valve acoustic signal data provided by Samson AG (Frankfurt). Our method has achieved state-of-the-art results. The prediction performance on the binary classification (cavitation and no-cavitation) and the four-class classification (cavitation choked flow, constant cavitation, incipient cavitation and no-cavitation) are satisfactory and outperform the traditional XGBoost by 4.67% and 11.11% increase of the accuracy.