Fault detection and diagnosis of a gearbox in marine propulsion systems using bispectrum analysis and artificial neural networks

Li, Zhixiong, Yan, Xinping, Yuan, Chengqing, Zhao, Jiangbin, and Peng, Zhongxiao (2011) Fault detection and diagnosis of a gearbox in marine propulsion systems using bispectrum analysis and artificial neural networks. Journal of Marine Science and Application, 10 (1). pp. 17-24.

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A marine propulsion system is a very complicated system composed of many mechanical components. As a result, the vibration signal of a gearbox in the system is strongly coupled with the vibration signatures of other components including a diesel engine and main shaft. It is therefore imperative to assess the coupling effect on diagnostic reliability in the process of gear fault diagnosis. For this reason, a fault detection and diagnosis method based on bispectrum analysis and artificial neural networks (ANNs) was proposed for the gearbox with consideration given to the impact of the other components in marine propulsion systems. To monitor the gear conditions, the bispectrum analysis was first employed to detect gear faults. The amplitude-frequency plots containing gear characteristic signals were then attained based on the bispectrum technique, which could be regarded as an index actualizing forepart gear faults diagnosis. Both the back propagation neural network (BPNN) and the radial-basis function neural network (RBFNN) were applied to identify the states of the gearbox. The numeric and experimental test results show the bispectral patterns of varying gear fault severities are different so that distinct fault features of the vibrant signal of a marine gearbox can be extracted effectively using the bispectrum, and the ANN classification method has achieved high detection accuracy. Hence, the proposed diagnostic techniques have the capability of diagnosing marine gear faults in the earlier phases, and thus have application importance.

Item ID: 21780
Item Type: Article (Research - C1)
ISSN: 1993-5048
Keywords: artificial neural networks, bispectrum, fault diagnosis, marine propulsion system, vibration analysis
Date Deposited: 16 May 2012 07:05
FoR Codes: 09 ENGINEERING > 0913 Mechanical Engineering > 091304 Dynamics, Vibration and Vibration Control @ 50%
09 ENGINEERING > 0913 Mechanical Engineering > 091309 Tribology @ 50%
SEO Codes: 86 MANUFACTURING > 8614 Machinery and Equipment > 861499 Machinery and Equipment not elsewhere classified @ 100%
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