... 12 08 2012 Various faults inevitably occur in mechanical systems and may result in unexpected failures. Hence, fault detection is critical to reduce unscheduled downtime and costly breakdowns. Empirical mode decomposition (EMD) is an adaptive time-frequency domain signal processing method...

...Qingbo He; Peng Li; Fanrang Kong rolling element bearing localized defect evaluation empirical mode decomposition intrinsic mode function multiscale slope feature Rolling element bearing is one of the most important rotating equipments in industrial applications. Unexpected failures...

... influences of human operators in the practical application. This paper compares two adaptive methods: local mean decomposition (LMD) and empirical mode decomposition (EMD) from four aspects, i.e., local mean, decomposed components, instantaneous frequency, and the waveletlike filtering characteristic through...

...Ruqiang Yan; Robert X. Gao This paper presents a signal decomposition and feature extraction technique for the health diagnosis of rotary machines, based on the empirical mode decomposition. Vibration signal measured from a defective rolling bearing is decomposed into a number of intrinsic mode...