计算阶比跟踪技术及其在振动监测中的应用  

Computed Order Tracking and Its Application in Rotating Machinery Vibration Monitoring

作　　者：汪江 张辉 田万军 陈悦 庞靖 

机构地区：[1]中国大唐集团科学技术研究院有限公司华东分公司,安徽合肥230031

出　　处：《安徽电气工程职业技术学院学报》2015年第3期98-103,共6页Journal of Anhui Electrical Engineering Professional Technique College

摘　　要：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。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.

关 键 词：傅里叶变换 阶比分析 计算阶比跟踪技术 振动监测系统 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]