基于提升格式小波变换的涡街信号处理方法

摘要

提升格式是一种完全在时域上构造小波的方法,其基本思想是以一个简单的多分辨率分析为起点,通过提升或对偶提升,得到满足一定性质的多分辨率分析,同时能够减小进行小波变换的计算量,提高算法实现的运行速度.该文应用小波提升原理,研究了基于boir5/3小波滤波器的提升格式算法,并将算法应用于涡街流量信号的处理,提取代表流量信息的涡街信号频率,并且相比第一代小波变换,该算法具有计算简单、运算量小的特点.%Lifting scheme is a fully constructed of wavelet method in the domain, the basin idea is a simple Multi-resolution analysis as a starting point, and gradually "lifting" to satisfy certain properties of Multi-resolution analysis and wavelet transform algorithm can improve the speed of the algorithm. This article use bior5/3 wavelet filter to enhance the format used in vortex signal processing, simulation results show that the lifting scheme wavelet transform can significantly improve the accuracy extraction algorithm of computing speed has definitely improved.