The short-time Fourier transform is applied to analyze non-stationary characteristics of vibration response of starting process in pre-delivery test of air turbine starters.Larger amplitude is identified and abnormal vibration is determined effectively to prevent the vibration faults of the air turbine starter after delivery.The comparison of STFT spectral analysis of starting process of the air turbine starter in normal condition and abnormal vibration condition is conducted to abtain the time frequency spectrum characteristics of abnormal vibration.The possible causes of components and assembly leading to such abnormal vibration are analyzed.The results demonstrate that vibration signal analysis of starting process of air turbine starter using STFT can identify non-stationary characteristics of vibration distinctly.
关键词
空气涡轮起动机/短时傅里叶变换/故障诊断
Key words
air turbine starter/short-time Fourier transform/fault diagnosis
维普
万方数据