摘要
通过对系统频谱能量的分析、给出了一阶系统的采样公式．并将其推广至二阶和高阶系统．对几个典型的采样周期经验取值规则作了分析．揭示了这些规则之间的内在联系和一致性．进一步阐明了控制采样周期的较佳取值问题．
The sampling formula of the first-order systems is given by the analysis of frequency spectrum energy, and the formula is extended to the second--order systems and the higher--order systems. Some typical emprical selecting rules of sampling period are made analysis. And the inner relation and unanimity of the rules are revealed. The better selecting problem of controlling sampling period is explained much more clearly.
关键词
采样周期
频谱
采样系统
取值
控制
sampling period
frequency spectrum
sampling system
