基于CEEMD的无绝缘轨道电路调谐区故障特征提取

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针对无绝缘轨道电路调谐区故障特征难以提取的问题,提出基于补充总体平均经验模态分解(CEEMD)的调谐区故障特征提取方法。采用四端网理论和传输线理论构建无绝缘轨道电路模型,仿真分析调谐区不同故障对轨道电路表面电压的影响;利用经验模态分解(EMD)、总体经验模态分解(EEMD)及CEEMD分别对电压信号进行分解,再提取故障特征向量。仿真结果表明:CEEMD方法抑制了EMD和EEMD引起的模态混叠和残留噪声现象,提高了运算效率,能够有效提取无绝缘轨道电路调谐区故障特征。

Aiming at the difficulty of extracting fault features of the tuning area in the jointless track circuits,this paper proposed a new method of fault diagnosis for extracting the fault feature of the tuning area based on the Complementary Ensemble Empirical Mode Decomposition(CEEMD).To achieve this goal,a jointless track circuit model was first built by using four terminal network theory and transmission line theory.Then,impact simulation and analysis on the track surface voltage when tuning area fault occurs were performed.The voltage signal was decomposed by the empirical mode decomposition(EMD),the ensemble empirical mode decomposition(EEMD)and CEEMD,respectively.Finally,the fault feature vector was extrac...