vb版本的fft变换，能够正反变换。正变换： 把时域信号转换成频域信号，反变换：能够把频域信号转换成时域信号。fft可广泛应用于工程领域，例如：信号的频域分析。震动，噪声的分析等等。-vb version of the fft transform, to transform pros. Transformation : put time domain signal into frequency domain signal, anti-transformation : can frequenc

这是一个对齿轮箱震动产生的信号进行捕捉并进行谱分析的程序 它应用了FFT变换算法-This is a gearbox vibration signals generated by capturing and spectral analysis procedures for the application of fast Fourier transform algorithm

对一个信号文件导入并进行fft变换，显示图形；对信号是否平稳，周期性，采样点数N，有偏无偏处理的估计效果等都做了处理和显示(A signal file is imported and transformed by FFT to display graphics; whether the signal is stable, periodic, sampling point N, the estimation effect of biased and unbiased processing are