基于小波分析的压气机失速故障检测

推进技术 ›› 2003, Vol. 24 ›› Issue (1): 55-57.

基于小波分析的压气机失速故障检测

姜涛,贾智伟,李应红

空军工程大学飞机发动机工程系陕西西安710038;空军工程大学飞机发动机工程系陕西西安710038;空军工程大学飞机发动机工程系陕西西安710038

发布日期:2021-08-15

Detection of compressor stall based on wavelet analysis

Dept. of Aeroengine Engineering, Airforce Engineering Univ., Xi’an 710038, China;Dept. of Aeroengine Engineering, Airforce Engineering Univ., Xi’an 710038, China;Dept. of Aeroengine Engineering, Airforce Engineering Univ., Xi’an 710038, China

Published:2021-08-15

摘要/Abstract

摘要： 当发动机发生失速时 ,会引起压气机内压力信号的变化 ,这种压力信号的变化可以看作信号的奇异点。利用小波分析所具有的时频特性和多分辨分析的特点 ,结合对压气机内压力信号频率成分的研究 ,通过检测模极大值的方法来确定信号的奇异点 ,进而探测压气机的失速故障。结果表明 ,利用该方法可以准确地检测压气机失速故障

关键词: 航空发动机;压气机;小波变换;失速特性;故障检测

Abstract: Stall in engine compressor will result in variation of pressure in its compressors, which is regarded as a singularity of signal. Considering the good performance of wavelet analysis in time and frequency domain, a method based on multi scale wavelet transform was proposed to detect the compressor stall, which is based on the fact the wavelet transform of a signal will take its modulus maximum at its singular point in transform domain. As a result, the engine stall is detected precisely through the method developed in this paper.

Key words: Aircraft engine;Air compressor;Wavelet transform;Stalling characteristic;Fault detection

姜涛,贾智伟,李应红. 基于小波分析的压气机失速故障检测[J]. 推进技术, 2003, 24(1): 55-57.