摘要
旋转机械的升/降速过程的阶比分析中测试数据容易受到阶比交叠噪声分量的干扰,使得分析结果失真甚至无意义。提出了对测试数据先用独立分量进行分解,将混合信号中的阶比分量和非阶比交叉噪声分离为不同独立信号分量,在此基础上再对分离出的阶比分量信号对应独立信号分量进行阶比跟踪分析,解决了阶比跟踪分析中的交叠噪声干扰问题。对Gabor阶比跟踪和独立分量分析的基本原理进行了简要介绍,在此基础上提出了本方法的实现方案,并在阶比分析中解决了独立分量分析具有的不确定性问题。通过仿真试验和实际测试对本方法的有效性进行了评价。
Data in test and measurement of order tracking(OT) during run-up or coast down of a rotating machinery are easy to be disturbed by order-crossing noise,it often makes OT results distorted and even invalid.Here,a new approach is proposed.It utilizes the independent component analysis(ICA) approach to separate the observed data into the order components corresponding independent components and order-crossing independent components.Then,order tracking analysis is only applied to the separated order components corresponding independent components.Following the brief instruction on Gabor order tracking and ICA,the scheme of the proposed approach is presented.The uncertainties of ICA are solved in the present approach too.Through simulations and tests the validity of the present approach is verified.
出处
《振动与冲击》
EI
CSCD
北大核心
2008年第10期98-102,105,共6页
Journal of Vibration and Shock
基金
云南省自然科学基金(批准号.2004E0011Q)
关键词
旋转机械
阶比跟踪
独立分量分析
rotating machinery
order tracking(OT)
independent component analysis(ICA)
