Filtering Method of Aero⁃engine Load Spectrum Based on Rain Flow Counting  

基于雨流计数的航空发动机载荷谱滤波方法

作　　者：XU Cong SUN Zhigang LU Qi SONG Yingdong 许聪;孙志刚;陆琪;宋迎东(南京航空航天大学能源与动力学院,中国南京210016)

机构地区：[1]College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,P.R.China

出　　处：《Transactions of Nanjing University of Aeronautics and Astronautics》2020年第6期947-954,共8页南京航空航天大学学报（英文版）

基　　金：This work was supported by the National Basic Research Program of China,National Nature Science Foundation of China(No.51675266);the Foundation Research Funds for the Center in NUAA(Nos.NJ20160038,NS2017011);Foundation of Graduate Innovation Center in NUAA(No.kfjj20170220)。

摘　　要：A filtering method of aero-engine load spectrum based on the rain flow counting is proposed in this paper.Firstly,the original load spectrum is counted through the rain flow method to get the peak and valley values.Then,some data points in the original load spectrum are added between the peak and valley values.Finally,the filtering spectrum is obtained.The proposed method can reflect the path information of the original load spectrum.In addition,it can also eliminate the noise in the signal and improve the efficiency of signal processing,which is of practical significance for the research of aero-engine.提出了一种基于雨流计数法的航空发动机载荷谱滤波方法。首先,对航空发动机载荷谱的原始谱进行雨流计数,得到雨流谱。然后,基于雨流谱,在雨流谱的峰谷值间添加若干个原始载荷谱中的数据点,最终得到基于雨流法的滤波谱。该方法能反映出原始载荷谱的加卸载路径信息,即在删除小循环的基础上,保证滤波谱与原始谱循环的峰谷值相同。此外,该方法能够更有效地剔除奇异点,对信号进行阈值滤波,消除信号中的噪声,提高后续的载荷谱数据处理效率。为航空发动机载荷谱的编制过程中飞行参数的预处理、野点剔除等方面的研究提供了一种新的方法。

关 键 词：load spectrum FILTERING rain flow counting AERO-ENGINE 

分 类 号：V231.91[航空宇航科学与技术—航空宇航推进理论与工程]