Gear health monitoring index construction method based on order sideband product spectrum

A health monitoring and order technology, applied in the testing of mechanical components, testing of machine/structural components, measuring devices, etc., to achieve the effect of strengthening the characteristic order of periodic faults and suppressing in-band noise interference

Pending Publication Date: 2022-03-11
苏州微著设备诊断技术有限公司
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Problems solved by technology

[0006] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a gear health monitoring index construction method based on the order sideband product spectrum, which can monitor the health status of the gear transmission in the presence of in-band noise. And based on the data-driven statistical learning method, the self-learning and self-setting function of constructing the indicator alarm threshold is realized

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  • Gear health monitoring index construction method based on order sideband product spectrum
  • Gear health monitoring index construction method based on order sideband product spectrum
  • Gear health monitoring index construction method based on order sideband product spectrum

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Embodiment Construction

[0055] The present invention will be described in detail below in conjunction with the embodiments and the accompanying drawings.

[0056] The embodiment selects the whole life data of the axle durability test of an axle enterprise. figure 1 Shown is a schematic diagram of the structure of the test axle and the layout of the measuring points. The axle is mainly composed of a fixed-axis bevel gear transmission, in which the number of teeth of the driving bevel gear is Z1=8, and the number of teeth of the driven bevel gear is Z2=39. A vibration acceleration sensor is respectively arranged on the bearing seat of the driven wheel, and the axle encoder signal is converted into a speed pulse signal by a single-chip microcomputer, and the whole life data of the axle endurance test is taken as the analysis object, and the present invention is introduced as follows:

[0057] Such as figure 2 As shown, a gear health monitoring index construction method based on the order sideband prod...

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Abstract

The invention discloses a gear health monitoring index construction method based on an order sideband product spectrum, and the method comprises the steps: carrying out the angle domain resampling of a measured vibration acceleration signal through employing a calculation order tracking technology, and carrying out the Fourier transform of a resampling signal, and obtaining an order spectrum; calculating an order sideband product spectrum by using an order spectrum according to the order resolution and the tooth number information, designing a rectangular window by taking the gear tooth fault feature order as a center, and capturing corresponding gear tooth fault information in the order sideband product spectrum; finally, health monitoring indexes are calculated, and an alarm threshold value self-learning method is established by means of a statistical learning method based on data driving; according to the method, the influence of in-band noise on monitoring index construction is effectively inhibited through the order sideband product spectrum technology, the proposed alarm threshold self-learning method is simple and universal, the dependence on professional technicians is avoided, and gear transmission real-time health monitoring and threshold self-setting functions are realized.

Description

technical field [0001] The invention belongs to the technical field of mechanical fault diagnosis, and in particular relates to a gear health monitoring index construction method based on an order sideband product spectrum. Background technique [0002] When the tooth surface of the gear transmission fails, its fault characteristic signal is mainly manifested as an amplitude modulation signal in the time domain, and in the frequency domain, it is centered on the meshing frequency of each order, and the fault characteristic frequency of the failed gear tooth is the bandwidth of the sideband. In the form of center-side frequency, monitoring the meshing frequency of each order of gear transmission and the change of sideband amplitude is the basic idea of ​​gear health monitoring. In the actual measurement of gear transmission vibration acceleration signals, there is always the problem of background noise interference. Although the commonly used narrow-band filtering method can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/021G06F17/15
CPCG01M13/021G06F17/15
Inventor 区瑞坚孙鹏郭美娜
Owner 苏州微著设备诊断技术有限公司
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