CEEMDAN-SE-WT降噪方法在航空发动机燃油流量信号中的应用  

Application of De-noising Method on Aviation Engine Fuel Flow Signal Based on CEEMDAN-SE-WT

作　　者：曲春刚[1,2] 朱胜翔 冯正兴 QU Chun-gang;ZHU Sheng-xiang;FENG Zheng-xing(College of Aeronautical Engineering,Civil Aviation University of China,Tianjin 300300,China;Aircraft Engine Condition Monitoring and Failure Diagnosis Laboratory,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学航空工程学院,天津300300 [2]中国民航大学,飞机发动机状态监控与故障诊断综合实验室,天津300300

出　　处：《科学技术与工程》2024年第15期6525-6533,共9页Science Technology and Engineering

基　　金：中央高校基本科研业务费专项(ZXH2012P007,KJZ53420220017)。

摘　　要：燃油流量信号是反映发动机状态和计算飞机排放物排放量的重要信号,但飞机飞行过程中传感器采集信号时不可避免地会受到外界环境以及内部因素干扰。提出一种结合样本熵(sample entropy,SE)的完全自适应噪声集合经验模态分解(complete ensemble empirical mode decomposition with adaptive noise,CEEMDAN)与小波变换(wavelet transform,WT)的联合降噪方法。首先使用CEEMDAN对燃油流量信号进行分解得到本征模态分量,利用样本熵筛选含噪分量,并用相关系数与方差贡献率进行复核。对于含噪分量使用小波阈值降噪进行处理。最后将未处理的模态分量和完成降噪的模态分量重构得到最终燃油流量信号。通过与其他方法比较,CEEMDAN-SE-WT方法拥有最高信噪比为85.287,降噪后燃油消耗总量与飞机总重变化最为接近,可以认为该方法较大程度保留了燃油流量信号中的有效特征,为后续计算民机排放物排放总量提供了良好的数据支持。The fuel flow signal is an important signal which reflect the status of the engine and calculate the emissions of aircraft emissions.However,it is inevitable that the sensor will be disturbed by external environment and internal factors during the acquisition of signals in flight.A joint denoising method combining sample entropy(SE)with adaptive noise(CEEMDAN)and wavelet transform(WT)was proposed.Firstly,CEEMDAN was used to decompose the fuel flow signal to obtain the intrinsic mode components,and the noise components were screened by sample entropy,checked by the correlation coefficient and variance contribution rate.Wavelet threshold denoising was used to process the model components containing noise.Finally,the unprocessed modal component and the denoising modal component were reconstructed to obtain the final fuel flow signal.Compared with other methods,the CEEMDAN-SE-WT has the highest signal-to-noise ratio of 85.287,and the total fuel consumption after noise reduction is closest to the change in the gross weight of the aircraft.It can be considered that this method retains the effective features in the fuel flow signal to a large extent,providing pure data support for calculating the total emissions of civil aircraft in the future.

关 键 词：降噪 燃油流量信号 完全自适应噪声集合经验模态分解 小波阈值降噪 样本熵 

分 类 号：V271.1[航空宇航科学与技术—飞行器设计]