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。
The time-frequency domain sampling characteristics of periodic signal, the truncation error and the spectrum leakage error caused by asynchronous sampling are discussed in detail.
讨论了周期信号取样的时域频域特性、非同步取样引起的截断误差和频谱泄漏误差。
Periodic error commonly appear in restoring uniform motion blurred picture, its appearance degrade the quality of restored image heavily.
周期性误差是匀速直线运动降质图像复原中普遍存在的现象，它严重影响复原图像质量。
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