关键词: 航空发动机;转子;故障;特征提取+

Abstract: A method to detect early fault and extract its features of aero-engine rotor systems with VI(Virtual Instruments) and MT(Matlab Tools) is proposed.It is based on the analysis of early fault of the aero-engine rotor systems.The method is described in detail.The early fault characteristic signal from detected signals and analysis the selection of early fault eigenvalue is extracted,in which useful signal is separated from dominant noise signal.The experiments on the early rub-impact and early unbalance of the aero-engine rotor system is performed and the effectiveness of our method was demonstrated in the following respects: it shows that not only complex calculation can be avoided with VI and MT but also early fault features can be quickly extracted.The early fault feature signal can be obtained by means of de-noising,decomposition and reconstruction.Early fault features of aero-engine rotor system can be fast extracted from the complex signals by energy distribution of feature frequency.Early fault can be separated and amplified by Wavelet Analysis.

Key words: Aero-engine;Rotor;Fault;Fault feature extraction~+