In this paper , according to the characters and processing requirements of flutter test data , based on the general theory of wavelet analysis , a set of laplace wavelets are introduced 本文根據(jù)顫振試驗信號的基本特征和處理要求,在對小波一般理論研究的基礎(chǔ)上,引入了一種適用于顫振試驗信號處理( ftdp )的小波? ? laplace小波。
Turbulence response . the functions of the methods are investigated by computer simulation and further examined by using flutter testing data of low - speed wind - turne of some aeroelastical modes . the related software is developed on matlab and labview for windows 結(jié)果表明,本文方法在精度、有效性和數(shù)值特性等方面優(yōu)于現(xiàn)有的時頻域濾波方法,并具有較好的應(yīng)用特性,可以滿足工程應(yīng)用的實際需求。
Simultaneously , a new fbp criterion is presented based on the gray - lavel and contour for the image of gabor spectrogram and the relation parameter is used to make flutter boundary prediction . the functions of the method are studied by computer simulation and further examined by using several flutter testing data ( low - speed wind - tunnel , high - speed wind tunnel and flight ) 本文詳細(xì)研究了顫振信號聯(lián)合時頻譜圖的特征,應(yīng)用圖像邊緣識別方法對顫振信號時頻譜圖的輪廓、灰度進(jìn)行了綜合分析,給出了一種全新的顫振余量定標(biāo)量化法,依此量化值完成對顫振邊界的外推。
The theory analysis and method principle are presented the characteristics of the two methods are studied by computer numerical simulation . the results show that both the methods are reasonable and feasible . focused on the features and requirements of flutter test data processing , the methods presented here are used to pickup the major information as a pre - processing technique the application scheme is brought out for flutter boundary prediction based on subcritica 根據(jù)顫振試驗的原理和觀測信號特點,本文將所提出的兩種時頻域濾波算法引入到了飛機(jī)結(jié)構(gòu)亞臨界響應(yīng)分析的顫振邊界預(yù)測( fbp )研究當(dāng)中,給出了一種新的顫振邊界預(yù)測方案,即通過聯(lián)合時頻分析與時頻域濾波提取有效信號再進(jìn)行模態(tài)參數(shù)提取與顫振邊界預(yù)測。
Focused on the nonstationary features and analysis requirements of flutter test data , the application scheme is brought forward for flutter signal processing . by using computer simulation and flutter test of low - speed wind - tunnel of some aeroelastical modes , the characteristics of the scheme are investigated 本文基于顫振試驗信號的非平穩(wěn)特點與分析需求,應(yīng)用自適應(yīng)時頻分析技術(shù)給出并實現(xiàn)了兩種新的顫振信號處理方案,重點研究了適用于連續(xù)變速顫振試驗的顫振邊界預(yù)測問題。