Early detection of gear tooth cracking using the resonance demodulation technique
Early detection of gear tooth cracking using the resonance demodulation technique
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DOI：
10.1006/mssp.2001.1416
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发表时间：
2001-09-01
影响因子：
8.4
通讯作者：
Wang, WY
中科院分区：
文献类型：
--
作者：
Wang, WY
共振解调技术已广泛应用于滚动轴承诊断。提出了一种利用共振解调技术进行齿轮齿裂早期检测的方案。目的是对现有的基于同步信号平均技术的齿轮箱故障诊断技术进行补充。提出的方案侧重于齿轮齿裂纹在啮合时会产生振动冲击，从而激发结构共振。该方案首先从同步信号均值中去除齿轮啮合的规则谐波，产生剩余信号。然后，在齿轮啮合谐波范围内的结构共振周围的残余信号带通滤波。带通残余信号被解调，以提取与裂纹引起的突然变化有关的特征，在一个完整的旋转感兴趣的齿轮。然后可以对解调信号使用一些统计措施，作为裂纹存在和状态的指示器。在本文中。提出了描述齿轮啮合信号及其处理的解析信号模型，并在此基础上提出了共振解调技术。通过数值模拟数据、起落架试验数据和直升机飞行振动数据对该方法进行了验证。结果表明，共振解调技术是早期检测齿轮齿裂的有效工具。(C) 2001学术出版社。
The resonance demodulation technique has been extensively used for rolling bearing diagnostics. This paper presents a scheme of using the resonance demodulation technique for early detection of gear tooth cracks. The objective is to supplement the current techniques of gearbox fault diagnosis based on the synchronous signal averaging technique. The proposed scheme focuses on the fact that gear tooth crack will produce vibration impacts that would excite the structural resonances when the cracked tooth is engaged. Using this scheme, the regular gear meshing harmonics are first removed from the synchronous signal average to generate the residual signal. The residual signal is then band-pass filtered around a structural resonance within the range of gear meshing harmonics. The bandpassed residual signal is demodulated to extract the features related to the crack-induced sudden change in a complete revolution of the gear of interest. A number of statistical measures can then be used on the demodulated signal as an indicator on the existence and status of the crack. In this paper. an analytic signal model is also proposed to describe the gear meshing signal and its processing, the resonance demodulation technique is presented based on the signal model. The method is validated using numerically simulated data, test data from a gear rig, and helicopter in-flight vibration data. The results show that the resonance demodulation technique is an effective tool for the early detection of gear tooth cracks. (C) 2001 Academic Press.