Journal ArticleDOI
Identification of multiple characteristic components with high accuracy and resolution using the zoom interpolated discrete Fourier transform
TLDR
In this article, the interpolated discrete Fourier transform (IpDFT) with maximum sidelobe decay windows is investigated for machinery fault feature identification, which combines the idea of local frequency band zooming-in with the IpDFTs and demonstrates high accuracy and frequency resolution in signal parameter estimation when different characteristic frequencies are very close.Abstract:
Complex systems can significantly benefit from condition monitoring and diagnosis to optimize operational availability and safety. However, for most complex systems, multi-fault diagnosis is a challenging issue, as fault-related components are often too close in the frequency domain to be easily identified. In this paper, the interpolated discrete Fourier transform (IpDFT) with maximum sidelobe decay windows is investigated for machinery fault feature identification. A novel identification method called the zoom IpDFT is proposed, which combines the idea of local frequency band zooming-in with the IpDFT and demonstrates high accuracy and frequency resolution in signal parameter estimation when different characteristic frequencies are very close. Simulation and a case study on rolling element bearing vibration data indicate that the proposed zoom IpDFT based on multiple modulations has better capability to identify characteristic components than do traditional methods, including fast Fourier transform (FFT) and zoom FFT.read more
Citations
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Journal ArticleDOI
Rolling bearing fault diagnosis using an optimization deep belief network
TL;DR: Stochastic gradient descent is used to efficiently fine-tune all the connection weights after the pre-training of restricted Boltzmann machines (RBMs) based on the energy functions, and the classification accuracy of the DBN is improved.
Journal ArticleDOI
A review of wind turbine bearing condition monitoring: State of the art and challenges
TL;DR: In this article, the authors provide a review on wind turbine bearing condition monitoring techniques such as acoustic measurement, electrical effects monitoring, power quality, temperature monitoring, wear debris analysis and vibration analysis.
Journal ArticleDOI
Fault diagnosis of rotating machinery based on the statistical parameters of wavelet packet paving and a generic support vector regressive classifier
TL;DR: A new intelligent fault diagnosis scheme based on the extraction of statistical parameters from the paving of a wavelet packet transform (WPT), a distance evaluation technique (DET) and a support vector regression (SVR)-based generic multi-class solver is proposed.
Journal ArticleDOI
Health Monitoring of Cooling Fans Based on Mahalanobis Distance With mRMR Feature Selection
TL;DR: A novel method for the health monitoring of cooling fans based on Mahalanobis distance with minimum redundancy maximum relevance features is proposed and the results show that the proposed approach is feasible.
Journal ArticleDOI
Misfire and valve clearance faults detection in the combustion engines based on a multi-sensor vibration signal monitoring
TL;DR: This research investigates the engine faults, including the misfire and valve clearance faults, using the vibration data captured by four sensors placed in different locations of the automobile engine and under different experimental circumstances.
References
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Digital spectral analysis : with applications
TL;DR: This new book provides a broad perspective of spectral estimation techniques and their implementation concerned with spectral estimation of discretespace sequences derived by sampling continuousspace signals.
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Some windows with very good sidelobe behavior
TL;DR: Correct plots of Harris' windows are presented and additional windows with very good sidelobes and optimal behavior under several different constraints are derived.
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Prognostics and health management of electronics
Nikhil M. Vichare,Michael Pecht +1 more
TL;DR: The state-of-the-art in the area of electronics prognostics and health management can be found in this article, where four current approaches include built-in-test (BIT), use of fuses and canary devices, monitoring and reasoning of failure precursors, and modeling accumulated damage based on measured life-cycle loads.
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Prognostics and Health Management of Electronics
TL;DR: In this paper, a physics of failure (PoF) based approach is proposed for the prediction of the future state of reliability of a system under its actual application conditions, which integrates sensor data with models that enable in situ assessment of the deviation or degradation of a product from an expected normal operating condition.
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