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基于时频分析的高速列车转向架混合故障盲分离 被引量:1

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摘要 针对高速列车同时发生两种故障的问题,提出了一种基于短时傅里叶变换(Short-Time Fourier Transform,STFT)和时频比的高速列车转向架混合故障盲分离算法。首先对观测数据进行STFT线性时频变换,再运用混合信号的时频比(Time-Frequency Ratio of Mixtures,TIFROM)估计单源域,得到分离矩阵;然后对源信号和分离后的估计信号分别提取矢量特征,用于盲分离准确度评价;最后用支持向量机(Support Vector Machine,SVM)识别盲分离的正确率。
出处 《电气应用》 2015年第12期109-113,共5页 Electrotechnical Application
基金 国家自然科学基金重点项目(61134002)
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