Multiple-domain manifold for feature extraction in machinery fault diagnosis

作者：Gan Meng^*; Wang Cong; Zhu Chang'an

来源：Measurement, 2015, 75: 76-91.

DOI：10.1016/j.measurement.2015.07.042

• Singular value decomposition (SVD)
• Feature space construction
• Manifold learning
• Multiple-domain manifold (MDM)
• Machinery fault diagnosis

Extracting features of vibration signals is a key technology in mechanical device state monitoring and fault diagnosis. This study proposes a novel multiple-domain manifold (MDM) method to achieve representative features based on singular value decomposition (SVD) and manifold learning. MDM features are generated by three main steps: first, phase space reconstruction is applied to signals in time domain and frequency domain to achieve a reconstructed 2-D space, respectively; second, SVD is used to calculate singular values (SVs) in the reconstructed spaces, as well as the improved Hilbert-Huang spectrum of the signal; and finally, manifold learning is employed to extract the MDM features by revising the SVs. The MDM features can reveal the intrinsic information of signals, and exhibit high-stability denoising effect. Moreover, the low-dimension property is beneficial for an effective diagnosis. The validity of MDM is confirmed by detecting bearing and gear faults, which demonstrates the advantages and potential practical applications of the method for recognizing mechanical fault patterns.

• 出版日期2015-11
• 单位中国科学技术大学