ウェーブレット解析を利用した軸受給油不足時の軸振動診断(機械力学,計測,自動制御)

概要

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We developed a diagnosis method for an abnormal rotor vibration with reducing lubricant in tilting pad journal bearings. We suggest a method of diagnosis based on a statistical approach using repetition in an incidental vibration signal. That repetition is calculated using normalized amplitude of vibration for each frequency to diagnose anomalies early. The time-frequency characteristics of vibration amplitude were calculated using continuous wavelet analysis. On this diagnosis method, we compared measured repetitions with pre-measured repetitions of abnormal vibrations using inner products. We applied the diagnosis method to the measured vibration. We found that incidental low-frequency vibration occurred by reducing the lubricant, and the low-frequency vibration became a steady high-frequency vibration as the lubricant decreased. The diagnosis method detected the occurrence and the transition of the rotor vibration when lubricant in the bearings was reduced.
社団法人日本機械学会の論文
2005-12-25