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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。经实例证明,此法误差小,计算效率高,完全能够满足工程上的需要。
The method to calculate the frequency characteristics of discrete mathematical model by using Fast Fourier Transform (FFT) is introduced. The example shows that this method is small error, high computational efficiency, fully able to meet the engineering needs.