The rub failures between rotating and stationary parts in rotating machinery may contribute to vibration signals measured on the machine as the colored noise component. But, for the colored noise mixed in vibration signals, ordinary FFT or autoregressive (AR) spectrum analysis methods can't provide sufficient and reasonable spectra estimates. In this paper, we exploited Adaptive Line Enhancer (ALE) technique to separate the colored noise from vibration signals in the time domain. The capability of the technique was evaluated using Simulink for some simulated vibration signals composed of three...
