Gear fault diagnosis platform and gear fault diagnosis method

A fault diagnosis and gear technology, applied in the direction of machine gear/transmission mechanism testing, etc., can solve problems such as the failure classification and recognition rate is not ideal, the sample data point category information is not considered, and the effect is not good.

Inactive Publication Date: 2013-01-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, linear dimensionality reduction methods such as principal component analysis are not effective when dealing with nonlinear structural data; nonlinear dimensionality reduction is mainly through manifold learning methods such as local preservation mapping,

Method used

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  • Gear fault diagnosis platform and gear fault diagnosis method
  • Gear fault diagnosis platform and gear fault diagnosis method
  • Gear fault diagnosis platform and gear fault diagnosis method

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Experimental program
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Embodiment

[0031] Depend on figure 1 As shown, a gear fault diagnosis platform of the present invention includes a stand 1, a motor 2, a reducer 4, a coupling 5, a data acquisition card 6, a rotational speed torque sensor 7, a coupling 8, an acceleration sensor 9, and a gear box 11. Fuel saving valve 12, coupling 13, magnetic powder loader 14, tension controller 15, vibration analyzer and computer 16; the output shaft of the motor 2 is connected to the reducer 4, and the reducer 4 is connected to the rotational speed and torque through the coupling 5 The sensor 7 is connected, the rotational speed torque sensor 7 is connected with the gear box 11, and the gear box 11 is connected with the magnetic powder loader 14; the magnetic powder loader 14 is connected with the tension controller 15; the motor 2, the rotational speed torque sensor 7, the acceleration sensor 9 They are respectively connected to the data acquisition card 6, and the data acquisition card 6 is connected to the vibration...

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Abstract

The invention discloses a gear fault diagnosis platform and a gear fault diagnosis method. On the platform, gear faults are simulated and vibration signals are collected, the improved local preserving projection algorithm is combined with a Bayes classifier, the mode recognition effect is judged according to the correct classification rate of the Bayes classifier, the vibration signals of the gear faults are measured by a vibration acceleration sensor, the principal component analysis is conducted firstly, and then, kernel transformation, construction of the nearest neighbor graph, solving of mapping space and the like are conducted; and the Bayes classifier is used for recognition in classification according to multi-fault classification. Compared with the principal component analysis, the laplace algorithm and the local preserving projection, the improved local preserving projection fault recognition rate can be greatly increased. According to the improved local preserving projection algorithm and the Bayes classifier combined fault mode recognition method, the fault recognition rate is increased and the accuracy is improved, and the effect of the fault mode recognition of the gear can be improved. The gear fault diagnosis platform has a simple structure, and a high-accuracy diagnosis platform can be provided for the fault recognition of the gear.

Description

technical field [0001] The invention relates to the technical field of gear fault diagnosis, in particular to a gear fault diagnosis platform and a gear fault diagnosis method. Background technique [0002] At present, the gear fault diagnosis test bench is used to simulate gear faults. By loading the gears, collecting fault signal vibration analysis under gear faults, and establishing a diagnostic database, it provides an effective basis for gear fault diagnosis. Vibration analysis is the application of various dynamic testing instruments to collect, record and analyze the vibration time-frequency domain signal changes of the vibrating parts in the gear on the gear fault test bench. Vibration analysis technology determines the location of the fault through the time-frequency domain analysis of the vibration part. Vibration signal processing mainly includes time-domain analysis, frequency-domain analysis and time-frequency domain analysis. [0003] The key to vibration dia...

Claims

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Application Information

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IPC IPC(8): G01M13/02
Inventor 谢小鹏肖海兵冯伟黄博
Owner SOUTH CHINA UNIV OF TECH
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