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工程与应用
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ComputerEngineering andApplications计算机工程与应用
基于HHT的液压管路裂纹故障诊断方法研究李哲洙12，高培鑫"，佟琨"，赵大哲12，刘积仁1.2
LI Zhezhu'-2, GAO Peixin', TONG Kun*, ZHAO Dazhe'-, LIU Jiren'.2
1.东北大学信息科学与工程学院，沈阳110819 2.东软集团，沈阳110179
3.大连理工大学机械工程学院，辽宁大连116024 4.中捷机床有限公司，沈阳110142
2016,52(20)
1.College of Information Science and Engineering, Northeastem University, Shenyang 110819, China 2.Neusoft Group, Shenyang 110179, China
3.College of Mechanical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China 4.Zhongjie Machine Tools Co., Ltd, Shenyang 110142, China
221
LI Zhezhu, GAO Peixin, TONG Kun, et al. Research of fault diagnosis method of hydraulic pipeline craeks based onHHT.Computer Engineering andApplications, 2016,52(20):221-226.
Abstract : In this paper, the HHT method is applied to detect the crack faults of hydraulic pipeline. The crack faults diagnosis of hydraulic pipeline method based on HHT is proposed, and an experimental application to the normal hydraulic pipeline and a crack hydraulic pipeline demonstrates the effectiveness of the detection technique. First, EMD (Empirical Mode Decomposition) vibration signal decomposition is done. The EMD and HHT method is introduced to analyze the vibration signals of the aeroengine hydraulic pipeline cracks. The results of the vibration signal of an engine hydraulic pipeline cracks show that the method can overcome the defects that the time domain and frequency domain cannot be obtained at the same time by Fourier spectrum. And at the same time, the marginal spectrum can more objectively reflect the frequency and amplitude distribution of the cracks hydraulic pipeline. In addition the marginal spectrogram shows that no cracks in hydraulic pipeline and cracks hydraulic pipeline vibration signal frequency energy focuse on 25 Hz, respectively, the whole system stiffiness of cracked is greater than that of no cracks. Therefore, the vibration increase of cracks pipeline can be expressed by HHT method obviously.
Key words: hydraulic pipeline cracks; Hilbert-Huang transform; fault diagnosis; empirical mode decomposition
摘
要：将HHT方法应用于液压管路裂纹的故障诊断，提出基于HHT的液压管路裂效故障诊断方法，并以正常液压
管路和有裂效液压管路为例进行实验验证，首先进行EMD(经验模态分解法)振动信号分解，将EMD和HHT方法引入航空发动机液压管路裂纹的振动信号分析，某发动机液压管路的裂纹振动信号的分析结果表明，该方法能够克服傅里叶谱无法同时获得时城和频城信息的块陷。同时边际谱能够比较真实客观地反映有裂效液压管路的频率和幅值分布情况，此外由边际频谱图中可知，无裂纹液压管路、有裂纹液压管路振动信号的频率能量分别集中于25HZz，
有裂纹的整体系统度大于无裂纹的，据此，有裂纹的管路，其振动加大的现象得以由HHT方法明显呈现，关键词：液压管路裂纹；希尔伯特黄转换(HHT)；故障诊断；经验模态分解法(EMD）
文献标志码：A
中图分突号：TN911.72
doi: 10.3778/j.issn.1002-8331.1411-0127
作者简介：李哲殊（1969一），男，博士在读，工程师，主要研究方向：计算机应用、软件工程、软件架构；高培鑫（1986一），男，博士在
读，主要研究方向：信号处理与故障诊断、动力学与控制；修琨，男，工程师，主要研究方向：液压系统振动控制；赵大哲，女，博士，教投，主要研究方向：图像处理，软件工程；刘积仁，男，博士，教授，主要研究方向：医学图像处理与分析、计算机网络技术，嵌入式软件技术。
收稿日期：2014-11-13
修间日期：2015-01-20
文编号：1002-8331(2016)20-0221-06
CNKI网络优先出版:2015-06-05, http:/www.cnki.net/kcms/detail/11.2127.tp.20150605.1059.002.html
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