Hui Li
The Journal of Mechanical Science and Technology, vol. 23, no. 2, pp.291-301, 2009

Abstract : This work presents the application of a new signal processing technique, the Hilbert-Huang transform and its marginal spectrum, in analysis of vibration signals and fault diagnosis of roller bearings. The empirical mode decomposition (EMD), Hilbert-Huang transform (HHT) and marginal spectrum are introduced. First, the vibration signals are separated into several intrinsic mode functions (IMFs) by using EMD. Then the marginal spectrum of each IMF can be obtained. According to the marginal spectrum, the localized fault in a roller bearing can be detected and fault patterns can be identified. The experimental results show that the proposed method may provide not only an increase in the spectral resolution but also reliability for the fault detection and diagnosis of roller bearings.

Keyword : Bearing; Faults diagnosis; Empirical mode decomposition; Hilbert-Huang transform; Signal processing; Marginal spectrum