2012, Volume 7, Issue 3
Frontiers of Mechanical Engineering >> 2012, Volume 7, Issue 3 doi: 10.1007/s11465-012-0328-1
HHT-based crack identification method for start-up rotor
State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Next Previous
Abstract
This paper presents a crack identification method for start-up rotor based on the Hilbert-Huang transform (HHT). With this method, the instantaneous frequency (IF) of each intrinsic mode function is obtained through the Hilbert transform, and the spectrum of IF is calculated accordingly. The influence of acceleration and crack depth on the rotor is analyzed through experiments. HHT is employed to detect the shallower crack, and is then tested during the start-up process of the rotor. The results of the experiment show that HHT is a better tool for crack detection than fast Fourier transform.
Keywords
京公网安备 11010502051620号
