CAJ | 학술논문

傅里叶变换在分析旋转机械升、降速等非稳态振动信号时会产生频谱泄露,导致频谱模糊,阶比分析能够有效解决这一问题,文章比较了计算阶比跟踪与硬件阶比跟踪技术的各自优缺点,通过Matlab仿真示例演示了计算阶比跟踪技术的明显优势,并设计开发了汽轮发电机组振动在线监测系统.
부리협변환재분석선전궤계승、강속등비은태진동신호시회산생빈보설로,도치빈보모호,계비분석능구유효해결저일문제,문장비교료계산계비근종여경건계비근종기술적각자우결점,통과Matlab방진시례연시료계산계비근종기술적명현우세,병설계개발료기륜발전궤조진동재선감측계통.
Spectrum leakage can be found when using Fourier transform for unsteady vibration signal, which is acquired from rotating machinery during speed-up or speed-down.Order analysis is a technology which can avoid the occurrence of spectrum leakage.The article compares a computed order tracking technology ( COT) with the traditional order tracking one which bases on hardware, and reveals the ad-vantage of COT by using a Matlab simulated example.A steam turbine generator unit vibration monitoring system is developed using COT in the last.