基于VMD-TEO 的多分支小电流接地系统行波故障定位庞清乐叶林马兆兴郑杨Science Technology & Engineering
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针对小电流接地故障行波波头难以检测,行波波速不确定和多分支线路难以精确定位等问题,提出一种新的行波定位方法.首先,对故障电流进行相模变换得到线模信号,并对线模信号进行变分模态分解(variational mode decomposition, VMD),利用Teager能量算子(Teager energy operator, TEO)提取本征模态函数(intrinsic mode function, ...
TEO能量窗函数深层双向长短记忆神经网络(DBiLSTM)轴承故障诊断针对现代滚动轴承早期故障监测因数据量增大所带来的诊断困难问题,提出了基于变分模态分解(VMD)与TEO窗特征提取的深层双向长短记忆神经网络(DBiLSTM)轴承故障诊断方法.首先,利用改进果蝇算法优化的VMD-TEO窗函数,提取轴承振动信号的瞬时能量特征,构造具有时序特性...
Firstly, the instantaneous energy characteristics of bearing vibration signals were extracted by the VMDTEO window function that optimized by the improved fruit fly algorithm. Meanwhile, the characteristic matrix with time characteristic was constructed. Secondly, DBiLSTM...
In order to solve this problem, a fault diagnosis method is proposed based on adaptive variational mode decomposition (VMD) and Teager energy operator (TEO). Particles warm optimization (PSO) is used to optimize VMD system parameters to solve the problem of traditional VMD algorit...
VMD广义S变换Teager能量算子法煤矿井下供电线路工作环境恶劣,时常发生故障,且存在故障定位的难度大,研究较少等问题.据此提出了基于VMD-GST的TEO行波故障测距方法,用于煤矿井下输电线路故障定位.首先,提取故障信号,并经K=3层VMD分解,得到波动较大的IMF分量;然后再将选择的IMF分量经广义S变换得到S模矩阵,并采用Teager...