VMD-HD-KT去噪法在管道泄漏信号中的去噪应用  

Application of VMD-HD-KT Denoising Method in Gas Pipeline Leakage Detection

作　　者：王冬梅[1] 史少雄 路敬祎[1,2] WANC Dongmei;SHI Shaoxiong;LU Jingyi(School of Electrical and Information Engineering,Northeast Petroleum University,Daqing 163318,China;Heilongjiang Provincial Key Laboratory of Networking and Intelligent Control,Northeast Petroleum University,Daqing 163318,China)

机构地区：[1]东北石油大学电气信息工程学院,黑龙江大庆163318 [2]东北石油大学黑龙江省网络化与智能控制重点实验室,黑龙江大庆163318

出　　处：《吉林大学学报（信息科学版）》2023年第2期202-206,共5页Journal of Jilin University（Information Science Edition）

基　　金：国家自然科学基金资助项目(61873058);黑龙江省自然科学基金资助项目(LH2020F005);东北石油大学青年科学基金资助项目(2018QNL-33);冶金装备及其控制教育部重点实验室开放基金资助项目(MECOF2019B01)。

摘　　要：针对变分模态分解(VMD:Variational Mode Decomposition)难以选取预设尺度K和其分解后难以区分有效模态和噪声模态的问题,提出了一种由豪斯多夫距离(HD:Hausdorff Distance)确定K和肯德尔相关系数(KT:Kendall’s Tau)确定有效模态的联合准则方法(VMD-HD-KT),并将其应用于天然气管道泄漏信号去噪。首先,计算K=2~8 h最后一个模态与原始信号的HD,通过评估HD确定K,然后输入K值进行VMD分解,将原始信号分解成K个具有不同特征时间尺度的固有模态函数(IMF:Intrinsic Mode Functions),选取KKT大于0.1的IMF作为有效模态,最后进行信号重构。实验结果表明,VMD-HD-KT算法可以准确选取K值和有效模态,对仿真信号和管道泄漏信号有较好的去噪效果。It is difficult to select the preset scale K for VMD(Variational Mode Decomposition) and to distinguish the effective mode from the noise mode after decomposition. In order to solve the problem, a joint criterion method(VMD-HD-KT) is proposed to determine the presetscale K by HD(Hausdorff Distance) and the effective mode by Kendall correlation coefficient KT(Kendall 's Tau). And it is used to denoise the leakage signal of natural gas pipeline. First, the HD of the last mode and the original signal when K=2 to 8 is calculated, K is determined by evaluating HD, and then K value is input for VMD decomposition. The original signal is decomposed into K IMF(Intrinsic Mode Functions) with different characteristic time scales. IMF with K_(KT) greater than 0.1 is selected as the effective mode for signal reconstruction. The experimental results show that the VMD-HD-KT algorithm can accurately select the preset scale K and effective modes, and has a good denoising effect on the simulation signals and pipeline leakage signals.

关 键 词：变分模态分解 豪斯多夫距离 肯德尔相关系数 信号去噪 

分 类 号：TN911.72[电子电信—通信与信息系统]