兵工自动化Issue(4)：52-55,4.DOI:10.7690/bgzdh.2016.04.014
一种基于新阈值函数的小波降噪方法在高速风洞中的应用
Application of Wavelet De-nosing Method Based on New Threshold Function in High Speed Wind Tunnel
摘要
Abstract
This paper puts forward a de-noising method based on new threshold function for continuous acquisition signal of wind tunnel to solve the traditional method's conflict between noise pollution control and high frequency signal details retaining. Traditional wavelet threshold function noise de-noising method is introduced, according to the characteristics of the wavelet threshold de-noising method, a new threshold function has been constructed. Different methods have been used to de-noising the signal X, the CL-a curves were compared. Test results shows that the new threshold function has many advantages over traditional function, it has the higher similarity with the original signal. At the same time, by using different methods to deal with the calibration model, it is showed that the new threshold function method fits the step test better, it has a good de-noising performance and also can get the none-linear aerodynamics of the aircraft model or the non-stable character of the mutation signal.关键词
风洞连续信号/新阈值函数/小波变换/飞行器模型Key words
wind tunnel continuous signal/new threshold function/wavelet transform/aircraft model分类
信息技术与安全科学引用本文复制引用
张鹏,谢艳,魏志..一种基于新阈值函数的小波降噪方法在高速风洞中的应用[J].兵工自动化,2016,(4):52-55,4.基金项目
解放军总装备部"气动预研基金"(51313040205) （51313040205）
