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Development of virtual instrument in characteristic analysis of rotating machinery based on instantaneous frequency estimation

机译：基于瞬时频率估计的旋转机械特性分析虚拟仪器的开发

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摘要

Based on the recently quick-developing time-frequency analysis (TFA) technique and virtual instrument (VI) technique, a virtual instrument in characteristic analysis of rotating machinery is researched and developed successfully. By utilizing instantaneous frequency estimation (IFE) theoretics of TFA technique, and based on IFE of peak searching on the time-frequency spectrum, order analysis (OA) functions is put forward and implemented, such as order spectrum, order spectrum matrix, order tracking, order tracking filtering, and order component extraction, etc. Unlike the home and abroad existing popular characteristic analyzers, which need key phasing devices such as shaft encoder, phase-locked loop (PLL), phase-locked multiple frequency, tachometer, etc, to implement constant angle sampling directly or indirectly, whereas this instrument only uses the vibration signal of rotating machinery to carry out OA. This instrument makes up the shortage of these traditional instruments in analyzing the non-stationary signal of run-up and run-down process of rotating machinery. Therefore, it is a great breakthrough for the existing order analyzers.
机译：在最近快速发展的时频分析（TFA）技术和虚拟仪器（VI）技术的基础上，成功研发了一种用于旋转机械特性分析的虚拟仪器。利用TFA技术的瞬时频率估计（IFE）理论，并基于时谱上峰值搜索的IFE，提出并实现了阶次分析（OA）功能，如阶次谱，阶次谱矩阵，阶次跟踪等。 ，阶次跟踪滤波和阶次分量提取等。与国内外现有的流行特性分析仪不同，它需要关键相位装置，例如轴编码器，锁相环（PLL），锁相多频，转速表等，可以直接或间接进行定角采样，而本仪器仅利用旋转机械的振动信号进行OA。该仪器弥补了传统仪器分析旋转机械升降过程中的非平稳信号的不足。因此，对于现有的订单分析仪而言，这是一个巨大的突破。

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