摘要
基于小波变换可提取信号所需频率成分的特性 ,利用多个小波组合 ,设计较理想的带通滤波器 ,采用频谱细化法对航空弹射加速度信号作频谱分析 ,并将此法与经低通数字滤波器后得到的信号的FFT谱分析做了比较。结果表明 ,基于小波变换的频谱细化法比FFT谱分析法有较高的频率分辨率 ,实现起来也比较简单、容易 。
An idealer bandpassing filter was designed by using wavelet group and analysing ejection acceleration signal spectrum wiht spectrum zoom method. Compared with FFT spectrum analysis method, the result shows that frequency spectrum zoom method based on wavelet transform has higher frequency resolution rate than FFT spectrum method, moreover, is more simple and easier when performing. It's fit to spectrum analysis whose resolution rate is requested high.
出处
《青岛大学学报（工程技术版）》
CAS
2001年第1期52-55,共4页
Journal of Qingdao University(Engineering & Technology Edition)
