液压与气动2024，Vol.48Issue(4)：109-116,8.DOI:10.11832/j.issn.1000-4858.2024.04.015
基于改进Hilbert-Huang变换的管路环向裂纹故障诊断研究
Fault Diagnosis of Circumferential Crack in Pipeline Based on Improved Hilbert-Huang Transform
摘要
Abstract
In the process of manufacturing,processing,assembly and service,aircraft hydraulic pipelines may have planar defects.Under the action of seaworthy load,these defects will crack and expand,and eventually lead to pipe rupture and oil leakage.In order to diagnose the micro-crack in the pipeline,a self-built modal test platform and measurement and control system were used to collect and pre-process the vibration signals of the aviation hydraulic pipeline with circumferential cracks.However,in the process of Decomposition of pipeline vibration signals,it is difficult to obtain accurate intrinsic mode functions(IMF)due to the Mode aliasing problem of empirical mode decomposition(EMD)algorithm.In order to improve signal processing accuracy,an improved Hilbert-Huang transform method based on complete ensemble empirical mode decomposition with adaptive noise(CEEMDAN)and Hilbert transform theory is proposed to diagnose the ring crack of aviation hydraulic pipeline.The results show that this method can diagnose the circumferential crack fault of aviation hydraulic pipeline more accurately.关键词
航空液压管路/模态分析/改进Hilbert-Huang变换/裂纹故障诊断Key words
aviation hydraulic pipeline/modal analysis/improved Hilbert-Huang transform/crack fault diagnosis分类
机械制造引用本文复制引用
权凌霄,孙世博,狄梦然,李朋杰,熊国钦..基于改进Hilbert-Huang变换的管路环向裂纹故障诊断研究[J].液压与气动,2024,48(4):109-116,8.基金项目
国家自然科学基金(51775477) （51775477）
