【摘要】 研究了傅里叶变换与小波变换在信号故障诊断中的应用。仿真表明,小波变换在检测信号突变点方面比傅里叶变换优越得多,且利用小波变换可以精确地检测出信号突变的时间与位置。最后探讨了在应用小波变换进行故障检测时小波基的选取原则。更多还原

【Abstract】 The application of Fourier transform and wavelet transform to signal fault diagnosis was mainly concerned. The simulation example expatiates that wavelet transform is superior to the Fourier Transform in the signal detection and wavelet Transform can make the signal detection more accurate both in time and location. The selecting principles of wavelet basis in the application of wavelet transform to signal diagnosis were then discussed.更多还原