【摘要】 谐波小波具有简单的时频表达式和更加普遍意义上的正交性,在频域具有良好的盒形谱特性,以及简单快速的FFT分解算法。根据其FFT分解算法构造出谐波小波的时频网格图、时频等高线图与时频剖面图,并用它们成功提取出某试验台齿轮箱的周期性断齿冲击信号,说明谐波小波具有较大的工程应用价值。更多还原

【Abstract】 Harmonic wavelet has simple expressions both in time and frequency domain. It has orthgonality in more general sense. It has good box-like spectrum and efficient decomposing algorithm based on FFT. Its time-frequency mesh map, contour map and sectional map are built based on its FFT decomposing algorithm. By applying time-spectrum plots mentioned above to fault signals of a gear box, the periodic impact signals of broken gears are gained, which show that harmonic wavelet is practically valuable.更多还原