基于瞬时角速度信号窄带解调的太阳轮故障检测

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (5) : 263-268.

论文

尹兴超，郭瑜，李震焘，华健翔

作者信息 +

Fault detection of sun gear based on narrowband demodulation of IAS signals

YIN Xingchao, GUO Yu, LI Zhentao, HUA Jianxiang

Author information +

文章历史 +

摘要

由于时变传递路径以及振动传感器受测量频率下限的限制，及在转速较低工况下基于常规振动信号的太阳轮故障检测较为困难。对此，本文结合编码器信号的优势，提出一种基于编码器信号窄带解调技术的太阳轮故障检测方法。首先使用T法对光栅式编码器角度信号进行采集，然后使用向前差分法获得瞬时角速度（IAS）信号，随后使用角域同步平均抑制非同步干扰分量，最后通过窄带解调实现太阳轮故障检测。同时，在所提方法中提出一种基于峭度的解调频带选择策略和一种基于相位解调函数相位变化率的故障特征增强方法。实验证明IAS信号可以有效克服常规振动检测方法的不足，并验证了所提出方法能有效实现对太阳轮故障的检测。

Abstract

Because the time-varying transmission path and the vibration sensor are limited by the lower limit of measured frequency, it is difficult to detect the solar wheel fault based on conventional vibration signals under the condition of low rotational speed. In this paper, combining the advantages of encoder signal, a sun wheel fault detection method based on narrow band demodulation technology of encoder signal is proposed. Firstly, the Angle signal of raster encoder is collected by T method, then instantaneous angular velocity (IAS) signal is obtained by forward difference method, then the asynchronous interference component is suppressed by Angle domain synchronous averaging, and finally the fault detection of solar wheel is realized by narrowband demodulation. Meanwhile, a kurtosis based demodulation frequency band selection strategy and a fault feature enhancement method based on phase change rate of phase demodulation function are proposed. Experimental results show that IAS signal can effectively overcome the shortcomings of conventional vibration detection methods, and the proposed method can effectively realize the detection of solar wheel faults.

导出引用

尹兴超，郭瑜，李震焘，华健翔. 基于瞬时角速度信号窄带解调的太阳轮故障检测[J]. 振动与冲击, 2023, 42(5): 263-268

YIN Xingchao, GUO Yu, LI Zhentao, HUA Jianxiang. Fault detection of sun gear based on narrowband demodulation of IAS signals[J]. Journal of Vibration and Shock, 2023, 42(5): 263-268

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