During the start-stop process of high-speed bearing rotor system,the high-precision spectrum analysis method of sta-tionary and non-stationary signals was studied.The frequency,amplitude and phase of stationary signal spectrum analysis were corrected by proportional correction method.A method for transforming non-stationary signals in the t-time domain into stationary signals in the t2 time domain was studied.Based on the stationary signal,the spectral analysis was performed using the proportional correction method,fi-nally the results were returned to the t-time domain to obtain the frequency domain parameters at a certain moment.The simulation anal-ysis demonstrates the method can accurately extract both the spectral characteristics of the stationary signal and the frequency,ampli-tude,and phase of the non-stationary signal at a specific time,by which the problem of spectral analysis feature extraction of the fast-changing process of the bearing rotor system is effectively solved.It provides a new idea for the analysis of dynamic characteristics.
关键词
轴承转子系统/快变过程/非平稳信号/高精度频谱分析/快速傅里叶变换
Key words
bearing rotor system/fast-changing process/non-stationary signals/high-precision frequency spectrum analysis/FFT
维普
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