时频域滤波方法及其在颤振信号处理中的应用  

Time-Frequency Filtering Analysis and Applications to Flutter

作　　者：刘帅[1] 裴承鸣[1] 张哲[1] 宋叔飚[1] 

机构地区：[1]西北工业大学动力与能源学院,陕西西安710072

出　　处：《计测技术》2005年第1期4-6,共3页Metrology & Measurement Technology

基　　金：航空科学基金资助项目 (0 1A5 3 0 0 1)

摘　　要：采用自适应时频分析方法并通过理论分析和数字仿真完成了相应的数值特性与应用特性研究。根据颤振试验的原理和观测信号特点,将所提出的两种时频域滤波算法引入到了飞机结构亚临界响应分析的颤振边界预测研究当中,即通过联合时频分析(JTFA)与时频域滤波提取有效信号再进行模态参数提取与颤振边界预测,取得了预期的效果。Adapting the self-adaption time-frequency analysis method, through the theoretical analysis and digital simulation the study of relative numeral and applied characteristics has been done in this paper. According to the principle of the flutter test and the characteristics of the signal, the two time-frequancy field filtering algorithms are led to research on the flutter boundary prediction of the subcritical response of the aeroplane structure. Through the joint time-frequency analysis (JTFA) and the time-frequency field filtering, the effective signal and the model parameter are picked up and the flutter boundary is predicted. The desired result is achieved.

关 键 词：时频域 信号处理 滤波方法 联合时频分析 有效信号 时频分析方法 滤波算法 预测研究 预期 理论分析 

分 类 号：TN911.3[电子电信—通信与信息系统]