CAJ | 학술논문

利用小波分析所具有的时频特性特点，针对涡扇发动机起动过程存在的压力脉动异常现象，获取信号随转速变化的频谱图。重点介绍了发动机脉动频率分析方法，并结合试验测点布局，根据不同脉动的频率特点，对其脉动成分进行分解，分析出脉动频率产生的原因，为发动机起动问题的解决提供支持。研究结果表明：利用小波分析进行发动机起动过程的脉动异常研究，形象、直观，具有一定的工程应用价值。
이용소파분석소구유적시빈특성특점，침대와선발동궤기동과정존재적압력맥동이상현상，획취신호수전속변화적빈보도。중점개소료발동궤맥동빈솔분석방법，병결합시험측점포국，근거불동맥동적빈솔특점，대기맥동성분진행분해，분석출맥동빈솔산생적원인，위발동궤기동문제적해결제공지지。연구결과표명：이용소파분석진행발동궤기동과정적맥동이상연구，형상、직관，구유일정적공정응용개치。
Because of the instability of start-up signals, traditional signal processing methods such as FFT can’t be used. In this paper, the wavelet method was used for the data processing because of its time-fre?quency characteristics. According to the characteristics of engine start-up, the spectrum pressure signals were obtained. Combined with measuring point placements and the characteristics of each frequency, the pulsation was decomposed with wavelet analysis method to find out the causes generating the frequency. The study provided a support to solve the problems on engine start-up. The results show that the wavelet method is suitable for engine start-up signal analysis, which has good effects in engineering application.