介绍了利用快速富里叶变换(FFT)计算离散数学模型频率特性的方法。
A method of using fast Fourier transformation (FFT) to calculate the frequency characteristics of discrete mathematical model is introduced.
频域分析借助于快速富里叶变换分析（FFTA）过程，并用由计算机生成的数学模型进行测试。
The frequency-domain analysis is accomplished by fast-Fourier transform analysis(FFTA)procedures and tested with a computergenerated mathematical model.
本文应用谐波分析法分析了圆度误差，提出了一种圆度误差的简便分析方法，最后讨论了快速富里叶变换的应用。
Using harmonic analysis, the roundness error is analysed. A handy analytical method of roundness error is presented. Then the application of FFT is discussed.
采用快速离散富里叶变换处理信号；
The mathematical means of discrete Fast Fourier Transform is used in signal processing.
采用快速离散富里叶变换处理信号；
The mathematical means of discrete Fast Fourier Transform is used in signal processing.
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