Civil aviation QAR data reduction and it’s performance analysis based on wavelet scaling coefficients
Huan Xiuxia · Jisuanji gongcheng yu sheji · 2009
A great amount of data from aviatic and performance parameters are recorded by the quick access recorder (QAR) equipped on scheduled flights. Reduction of QAR data is an important step through data mining process for these datas. According to the characters of QAR data and for the need of applying data mining arithmetic, based on analysis of relative wavelet transform theory, a method of QAR time sequence data reduction is proposed using wavelet scaling coefficients and corresponding performance analysis method, and corresponding evaluating indicators are defined. Subsequent experiment proves its correctness and superiorities of taking into account of both characters of data in the time domain and freqency domain, less main diagnostic distortion, etc.