MULTIPLE SENSOR APPARATUS AND METHOD FOR MONITORING TURBOMACHINES

摘要

A method and device (100) for processing encoder signals from turbomachines (10) to produce frequency modulation signals representing fully isolated rotor vibrational resonances. Multi-sensor and multi-sideband group (72) processing provides enhanced results. The method provides dramatically improved frequency resolution. Amplitude modulation and random noise (56) effects are removed by a variety of artifact-free techniques. Signals then are completely separated into components (74, 76, 78) for rotational vibration and translational vibration. Fully isolating rotational vibration unmasks previously undetectable signal components of diagnostic value. In cases of high background vibration, Wiener filtering removes the effects of exogenous vibration. By these various techniques, the present invention provides significantly enhanced diagnostic information regarding condition and performance in turbomachines.