Application of local wave method in signature extraction of axis orbit
Zhao De-you · Journal of Dalian Maritime University · 2009
To prevent the interference of noise from blurring the rotor system with fault diagnosis,a purified method based on the time-scale characteristic filtering of local wave was developed,and the formula of filter was introduced.Local wave method can decompose any complicated signal into a finite number of intrinsic mode functions(IMFs) with local wave decomposition and defining instantaneous frequency.Every IMF describes different frequency and scale of the inherence oscillation mode.The analysis result shows that the feasibility is proved by filtering of signals with noise and the method is introduced to the identification of axis orbit of misalignment rotor,which could rationally and effectively purify axis orbit and extract the fault signature.