CAJ | 학술논문

针对航空滚动轴承振动信号信噪比低且非平稳特性，应用小波理论及小波降噪原理，对航空滚动轴承的振动信号进行小波降噪处理。通过对仿真信号的降噪处理和FFT变换，对比分析了振动信号经过小波降噪及FFT变换和原信号直接进行FFT变换的结果，得到了振动信号小波降噪的有效性。通过对轴承的实测振动信号的降噪处理，进一步表明了小波降噪在消除噪声干扰方面的优越性。
침대항공곤동축승진동신호신조비저차비평은특성，응용소파이론급소파강조원리，대항공곤동축승적진동신호진행소파강조처리。통과대방진신호적강조처리화FFT변환，대비분석료진동신호경과소파강조급FFT변환화원신호직접진행FFT변환적결과，득도료진동신호소파강조적유효성。통과대축승적실측진동신호적강조처리，진일보표명료소파강조재소제조성간우방면적우월성。
Aiming at air rolling bearing vibration signals low SNR and non-stationary characteristics , taking wavelet theory and principles of the wavelet noise reduction for air vibration signals of rolling bearings to conduct wavelet noise reduction pro-cessing.By means of the simulation signal wavelet noise reduction processing and fast Fourier transform, the contrast analysis of the vibration signals is made after wavelet noise reduction and FFT transform and the original signal directly to the result of the fast Fourier transform, and thus the validity of the vibration signal wavelet noise reduction is proved.Through the actual vi-bration signals of bearing conduct noise reduction processing , the result is a further indication of the superiority of wavelet noise reduction in eliminate noise interference .