The characteristics of error motion of shafting is a complex signal which includes periodic component and random term.
轴系回转误差运动的特征是一项复合信号，它含有周期分量和随机分量。
Aiming at these problems, this paper presents an efficient algorithm which use all zero digital filter for filtering the periodic component.
针对这两方面的问题，提出了一种用全零点数字滤波器滤除周期性分量的滤波算法。
To evaluate the influences of the stochastic component on apparatus, it is necessary to remove the periodic components from the vibration signal.
为评估随机成分对设备的影响，需要将周期成分从振动信号中去除。
Because of the limitation of theory, Fourier algorithm is unable to filtering the periodic component, and especially poor in restraining decaying DC component which is common in current malfunction.
由于傅氏算法原理上的局限，它不能完全滤除非周期分量，尤其对电流故障中常见的衰减直流分量的抑制能力很差。
It is difficult to detect the periodic impulse component in the vibration acceleration signal with conventional analysis methods such as time domain wave and frequency spectrum.
通过时域波形和频谱等基本分析手段来探测振动加速度信号中的周期性冲击分量往往是困难的。
The decaying DC component in the sampling signal will bring errors to the full-wave Fourier algorithm, which is derived with periodic signal.
全波傅氏算法是基于周期信号推导出来的，当采样信号中含有衰减直流分量时，将会产生误差。
However, in respect of a vibration acceleration signal, the signal to noise ratio (SNR) is often so small that the periodic impulse component is submersed in its intense background noises.
通常检测的机械振动加速度信号，由于信噪比太低，即使存在周期性的冲击分量也往往被淹没在强的背景噪声之中。
Whether there exists a periodic impulse component in a vibration signal is an important sign of a mechanical device being faulty.
机械设备振动信号中是否存在周期性的冲击分量是其有无故障的重要标志。
The trend component and non-periodic cycle components with different average cycle of the log-price series were found.
得到了趋势项和几个不同平均周期的非周期循环分量。
The trend component and non-periodic cycle components with different average cycle of the log-price series were found.
得到了趋势项和几个不同平均周期的非周期循环分量。
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