Noninvasive method and apparatus for determining resonance information for rotating machinery components and for anticipating component failure from changes therein

摘要: A method and apparatus is described for determining resonant frequencies of vibration turbine (20) (22) fan shafts (16) blades, other rotating machines (12) in which a element the machine has oscillatory vibrations that modulate fundamental frequency rotation (12). sensor (30) monitors (12), providing train pulses or signal representative angular The processed to provide modulation spectrum instantaneous-frequency components present. electronically resonance-information, spectral signals amplitude characteristics, both, vibrations. Signal-processing methods (36) include use Fast Fourier Transform Discrete Transform.