一种数字滤波器组在动态风洞试验中的应用

在动态风洞试验中，由于机械振动、随机扰动等原因，原始试验数据均有较大扰动。为得到其中的有用信息，需利用数字滤波器对其处理。基于MATLAB实现了梳状和频率抽样两种数字滤波器，对其各自特性做了较为深入的研究和比较。最后，利用二者串行组成了滤波器组。该滤波器组已经应用于预研项目中，结果表明，该滤波器组低频和高频特性均能够有效减弱信号中的干扰和噪声，达到预期目标。在不进行降采样率处理的情况下，达到相似的滤波结果，滤波器组的滤波时间仅为频率抽样滤波器的2％左右。

Application of Digital Filter Set in Dynamic Wind Tunnel Test

Due to the mechanical vibration and random disturbance,there are lots of noises in the raw data of dynamic wind tunnel test.In order to remove the noise,a digital filter set is designed and programmed by MATLAB,which is composed by comb filter and frequency sample Filter.The characteristics of each filter and filter set are studied in this paper.The filter set was applied in a preliminary research project,and the result was satisfied.Furthermore,the filter set is very efficient,which is 50 times quicker tha...