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首页> 外文期刊>Key Engineering Materials >A Time-Frequency Distribution based on a Moving and Combined Kernel and its Application in the Fault Diagnosis of Rotating Machinery
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A Time-Frequency Distribution based on a Moving and Combined Kernel and its Application in the Fault Diagnosis of Rotating Machinery

机译：基于移动组合核的时频分布及其在旋转机械故障诊断中的应用

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摘要

A new Cohen's class time-frequency representation with the moving and combined kernel is defined and its designing method is introduced for improving the time-frequency analysis of multicomponent signals. The positions and shapes of this kernel can be adjusted according to the characteristics of the analyzed signal. This kernel has two advantages, the first is that the processing time of the signal is shorter than that of the adaptive kernel, the second is that it may analyze a large class of signals. In the fault diagnosis of the machine, this kernel can change its parameters with the change of the rotating machine motion so as to extract the harmonic components and process the speed-up stage of the rotating machine. The result of the simulation and real example analysis demonstrates that this kernel is practical and effective.
机译：定义了一种新的具有移动核和组合核的Cohen类时频表示，并介绍了其设计方法，以改进多分量信号的时频分析。该核的位置和形状可以根据分析信号的特性进行调整。该内核具有两个优点，其一是信号的处理时间比自适应内核的处理时间短，其二是它可以分析一大类信号。在机器的故障诊断中，该内核可以随着旋转机器运动的变化而改变其参数，从而提取谐波分量并处理旋转机器的加速阶段。仿真和实例分析结果表明，该内核是实用有效的。

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