Study on Faults Diagnosis of Bearing Based on EMD and Envelope Spectrum

A novel method tofault diagnosis of bearing based on EMD and envelope spectrum is presented. EMD method is self-adaptive to non-stationary andnon-linearsignal. The methodology developed in this paper decomposes the original times series data in intrinsic oscillation modes, using the empirical mode decomposition. Then the envelope spectrum is applied to the selected intrinsic mode function which stands for the bearing faults. The basic principle is introduced in de- tail. The EMD is applied in the research of the faults diagnosis of the bearing. The experimental results show that this method based on EMD and envelope spectrum can effectively diagnosis the faults of bearing.