分析了数字方法运用于波形合成中由于DAC零阶保持特性造成的信号频谱高频失真的机理；
The mechanism of the signal spectrum distortion because of DAC's zero-order holding is analysed.
本文从零阶保持和滞后一拍控制这两个方面来研究：SPWM逆变电源的数字控制对系统性能的影响。
This paper focused on the research on the digital effect of SPWM inverter systemperformance from two aspects of zero-order-hold and one-step-delay.
从采样，计算延时，控制对象的零阶保持离散化等方面分析了数字化过程对有源电力滤波器性能的影响。
From sampling, calculation time delay, control object zero-order discretization, digitalization process influence to Active Power Filter is analyzed in this paper.
论文采用分数阶保持器(FROH)代替传统的零阶保持器(ZOH)，对减摇鳍系统进行数字控制设计。
This paper USES fractional order hold (FROH) to replace the traditional zero-order hold (ZOH), designs a numerical control system for the fin.
针对零阶保持器引起的幅度误差和相位误差，以及D/A转换器有限字长引起的误差进行了较为详细的分析，并进行了D/A误差仿真试验。
This paper mainly describes the amplitude and phase errors caused by zero-order holder and the error caused by finite word length of D/A, and computer simulation test of D/A error is also introuced.
针对零阶保持器引起的幅度误差和相位误差，以及D/A转换器有限字长引起的误差进行了较为详细的分析，并进行了D/A误差仿真试验。
This paper mainly describes the amplitude and phase errors caused by zero-order holder and the error caused by finite word length of D/A, and computer simulation test of D/A error is also introuced.
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