A novel denoising method for vibration signal of hob spindle based on EEMD and grey theory

When the vibration analysis is used to evaluate the wear status of the hob cutter, the collection of vibration signals is inevitably contaminated by noise. To solve this problem, a novel denoising method for the vibration signal based on ensemble empirical mode decomposition (EEMD) and grey theory, named EEMD-Grey, is proposed in this paper. Grey relational analysis (GRA) and grey model (G-model), as two important techniques in grey theory, are...