基于实值离散Gabor变换的阶比跟踪滤波  

Order Tracking Filtering Based on Real-Valued Discrete Gabor Transform

作　　者：程利军[1] 张英堂[1] 李健伟 孙宜权[1] 尹刚[1] 

机构地区：[1]军械工程学院火炮工程系,河北石家庄050003 [2]72502部队,山东济南250003

出　　处：《军械工程学院学报》2012年第3期65-68,共4页Journal of Ordnance Engineering College

基　　金：军队科研计划项目

摘　　要：提出了基于实值离散Gabor变换的阶比跟踪滤波方法．分析了阶比跟踪滤波为时频滤波的实质，给出了如何通过实值离散Gabor变换实现阶比跟踪滤波的步骤．通过对仿真信号阶比跟踪滤波前后的时频分布、阶比谱和时域信号对比，证实本方法能有效滤除阶比混叠成分．通过延长信号两端采样长度的方法可以消除阶比跟踪滤波后端点的误差．An order tracking filtering method based on real-valued discrete Gabor transform is put forward. Order tracking filter＇s essential is time frequency filter, the process of use real-valued discrete Gabor transform to achieve order tracking filtering is described. Through comparing the time-frequency distribution,order spectrum and time domain signal of simulation signal before and after order tracking filtering, we find that this method can efficiently eliminate the alias order component. Through extending the signal,the order tracking filter error at signal＇s start and end point can be eliminated.

关 键 词：旋转机械 阶次跟踪 GABOR变换 阶比跟踪滤波 等角度采样 

分 类 号：TH115[机械工程—机械设计及理论] TN911.72[电子电信—通信与信息系统]